Title of Invention

AN OLEFIN POLYMERIZATION PROCESS

Abstract

This invention relates to an olefin polymerization process comprising contacting one or more C2-C20 olefin monomers at a temperature from 0-250 and a pressure from atmospheric to 10,000 atmospheres with a catalyst composition comprising one of more Group 4 metal complexes and one or more activating cocatalysts selected from the group consisting of alumoxanes; neutral Lewis acids; ammonium-, phosphonium-, oxonium-, carbonium-, silylium- or sulfonium-salts of compatible, noncoordinating anions; ferrocenium salts of compatible, noncoordinating anions; and combinations thereof characterized in that the Group 4 metal complex corresponds to the formula; wherein M is titanium, zirconium, or hafnium; Q independently each occurrence is chloride, C1.6 hydrocarbyl, or dimethylamido, or two Q groups together are 1,4-dipheny 1-1,3-butadiene; R^ independently each occurrence is CM alkyl, trimethylsilyl or phenyl; R^ independently each occurrence is hydrogen or C1.20 hydrocarbyl or two adjacent R" groups are joined together, thereby forming a fiised ring structure; and R is a C 1.20 hydrocarbyl group.

Full Text

BRIDGED METAL COMPLEXES This invention relates to certain bridged Group 4 transition metal complexes possessing a unique bridging structure and to olefin polymerization catalysts obtained from such complexes. In one form, this invention embodies Group 4 transition metal complexes containing a unique bridged, or divalent ligand structure having two anionic, deiocalized n-bonded ligands attached thereto. In a second embodiment the invention relates to Group 4 transition metal complexes containing a unique bridged ligand containing one of the foregoing anionic, deiocalized n-bonded moieties and one anionic amido or phosphide moiety. In a third embodiment the invention relates to Group 4 transition metal complexes containing a unique bridged ligand containing two anionic amido and/ or phosphide groups. In all cases the unique bridge consists of either boron or aluminum atoms which are further ligated with nitrogen containing groups. . In Anew. Chem. Int. Ed. End.. 36. 21, p2338-2340 (1997) and in Phosphoms. Sulfur, and Silicon, 124 & 125, p561-565 (1997) amido substituted boron bridged ferrocenophanes useful for fuming poly(ferrocenes) by a ring opening polymerization were disclosed. The synthesis and characterization of Group 1 and 2 metal and tin complexes of 1,2-bis(dimethylamino)-1,2-di-9-fluorenyldiboranes were disclosed in Chem. Ber.. 127, p1901-1908. (1994), Diboranes having structure similar to those employed in the foregoing study were disclosed by the same researchers in Eur. J. Indoor. Chem., p505-509 (1998). Fen'ocenophane derivatives of similar misbrands for further molecular property studies were disclosed by J’ Roanoke. Chem., 530 pi 17-120 (1997). In Oraanometallics, 16, p4546-4550 (1997) boron bridged anta metallocenes complexes including dimethylsulfide and phosphine adducts thereof of possible use in Ziegler-Natta-type olefin polymerizations were disclosed. Non-bridged metallocenes such as 1-t-butyl-4,4,bis(Ti’-cyclopentadienyl)-2-(2,2,6,6-tetramethylpiperidino)-1-aza-2-bora-4-titana-cyclobutane are disclosed in Chem. Ber. (1987), 120(5), 863-5. In the patent literature, bridged metal complexes for use as olefin polymerization catalyst components, including such complexes containing one or more boron atoms in the bridge are generically disclosed by EP-A-416,815 and WO 98/39369. Figures 1 and 2 are the crystal structures (ORTEP) of the compounds of Examples 2 and 5 respectively. The present invention relates to certain bridged Group 4 transition metal complexes and to olefin polymerization catalysts obtained from such, said complexes coH'esponding to the following formulas: wherein Z, T, R’ and R’ are as defined above; Y’ and Y’' are an anionic, cyclic or non-cyclic, Tc-bonded group. NR\ or PR’ and R"* is hydrogen or a trimethylsilyl group. Such ligand groups of Formula 1A or 2A are readily prepared by contacting sources of the anionic groups (Y’'R’)" and (Y’'R"*)', particularly the Grignard or alkali metal salts thereof, with the neutral compound TZY’ or (TZ)2Y’2, where Y’ is a leaving group, especially halide, either as neat reagents or in an inert solvent, employing temperatures from -100 ‘C to 150 -C. Additionally, according to the present invention there is provided a process for preparing complexes of formula 1 and formula 2 in high racemic purity in the +2 formal oxidation state by contacting ligand structures of formula 1A or 2A where R"* is trimethylsilyl, or deprotonated diamines derivatives of ligand structures of formula 1A or formula 2A, with a Group 4 precursor of the formula 3: wherein M and Y’ are defined as above, R’ independently each occurrence is hydrogen, a hydrocarbyl group, a tri(hydrocart3yl)silyl group, or a tri(hydrocarbyl)silylhydrocariDyl group, said Regroups containing up to 20 atoms not counting hydrogen; and LB is a Lewis base, especially an ether, amine, or phosphine of up to 20 cartons. The reaction is desirably conducted in an inert solvent, especially an aliphatic or aromatic hydrocardon or ether, employing temperatures from -100 ‘c to 150 ‘C. This technique is similar to that disclosed in United States patent application 265,641, filed March 10,1999. differing in that different starting reagents are employed. Further according to the present invention there are provided catalyst compositions suitable for the polymerization of addition polymerisable monomers comprising one or more metal complexes of formulae 1 or 2 in combination with one or more activating cocatalysts or activated by use of an activating technique. Finally, according to the present invention there is also provided a polymerization process comprising contacting one or more addition polymerisable monomers with a catalyst composition comprising one or more metal complexes of formula 1 or 2 in combination with one or more activating cocatalysts or activated by use of an activating technique. The polymerization is preferably performed under solution, slurry, suspension, or high pressure process conditions, and the catalyst composition or individual components thereof may be used in a heterogeneous state, that is, a supported state or in a homogeneous state as dictated by process conditions. The catalysts of the present invention can be used in combination with one or more additional catalysts of the same or different nature either simultaneously or sequentially in the same or in separate reactors-Catalyst compositions according to the present invention possess improved catalytic efficiencies and improved thermal stability allowing for use under higher operating temperatures compared to catalysts comprising conventional metal complexes. All references to the Periodic Table of the Ele’nents herein shall refer to the Periodic Table of the Elements, published and copyrighted by CRC Press, Inc., 1997. Also, any references to a Group or Groups shall be to the Groups or Groups reflected in this Periodic Table of the Elements using the lUPAC system for numbering groups. By the term Vbonded" as used herein is meant that bonding occurs through an interaction involving delocalized electrons. Finally, by the term, "leaving group" is meant a ligand that is readily displaced by another ligand under ligand exchange conditions. The present Group 4 transition metal complexes contain a unique bridging group: (T-Z) or (T-Z)2. which imparts improved catalytic properties when used in combination with one or more activating cocatalysts or activating techniques in the presence of addition polymerisable monomers. While not desiring to be bound by theory, it is believed that the improvement in catalytic properties for such complexes may be due to the electronic properties of the ZT, Y’ and Y’ moieties. Preferred Group 4 transition metal complexes of the present invention which correspond to formula 1 or 2 are represented in formulas 4, 5, 6, 7, 8 and 9: wherein M, Z, T, Q and j are as defined above; R’ is hydrogen, or a hydrocarbyl, halohydrocarbyl, dihydrocarbylamino-hydrocarbyi, tri(hydrocaft)yl silyl)hydrocart)yl, Si(R’)3, N(R’)2. or’ group of up to 20 carbon or silicon atoms, and optionally two adjacent R’ groups can be joined together, thereby forming a fused ring structure, especially an indenyl ligand or a substituted indenyl ligand; and R’ is independently hydrogen, a hydrocarbyl group, a trihydrocarbylsityl group or a trihydrocarbylsilylhydorcarbyl group, said R’ having up to 20 atoms not counting hydrogen. When M is in the +4 oxidation state, j = 2 and Q independently each occun’ence is halide, hydride, hydrocarbyl, silylhydrocarbyl, hydrocarbyioxide, dihydrocarbylamide, said Q having up to 20 atoms not counting hydrogen. Alternatively, two Q groups may be joined together to form an alkandiol group or a conjugated C4’ diene ligand which is coordinated to M in a metallocyclopentene fashion. When M is in the +3 oxidation state, j = 1 and Q is either 1) a monovalent anionic stabilizing ligand selected from the group consisting of alkyl, cycloalkyi, aryl, silyl. amido, phosphide, alkoxy, aryloxy, sulfide groups, and mixtures thereof, and being further substituted with an amine, phosphine, ether, or thioethers containing substituent able to fonn a coordinate-covalent bond or chelating bond with M said ligand having up to 50 atoms not counting hydrogen; or 2) a C3.10 hydrocartiyl group comprising an ethylene unsaturation able to form an TAIlbone with M. When M is in the +2 oxidation state, j = 1 and Q is a neutral conjugated diene, optionally substituted with one or more tri(hydrocarbyl)silyl or tri(hydrocarbyl silyl)hydrocart)yl groups, said Q having up to 40 carbon atoms and forming a 7c-complex with M, Specific examples of the above metal complexes wherein M is in the +4 oxidation state are shown below in formulas 4a-9a, wherein the definitions of M, Z, R\ R’, and Rare as defined above: wherein Q, independently each occurrence is a halide, hydrocarbyl, hydrocarbyloxy, or dihydrocarbylamide group of up to 10 atoms not counting hydrogen, or two Q groups together form a C4-20 diene ligand coordinated to M in a metaliocyclopentene fashion. Most highly preferably Q independently each occurrence is chloride or a Ci-e hydrocarbyl group, or two Q groups together form a 2-methyl-1,3-butadienyl or 2.3-dimethyi-1,3-butadienyl group. Specific examples of the above metal complexes wherein M is in the +3 oxidation state are shown below in formulas 4b-9b. wherein the definitions of M, Z, R\ R’, and Rare as defined above: wherein Q, each occurrence is a monovalent anionic stabilizing ligand selected from the group consisting of alkyl, cycloalkyi, aryl, and sibyl groups which are further substituted with one or more amine, phosphine, or ether substituents able to form a coordinate-covalent bond or chelating bond 'vita M, said Q having up to 30 non-hydrogen atoms; or Q is a C3-10 hydrocarbyl group comprising an ethylene unsaturation able to fumy an r\3 bond with M, Most highly preferred examples of such Q ligands are 2-N,N"dimethylaminobenzyl, ally, and 1-methyl-allyl, Specific examples of the above metal complexes wherein M is in the +2 oxidation state are shown below in formulas 4C'9c, wherein the definitions of M, Z, R\ R’. and R’ are as defined above: wherein Q. each occurrence is a neutral conjugated diene, optionally substituted with one or more tri(hydrocarbyl)silyl groups or tri{hydrocarbyl)silylhydrocarbyi groups, said Q having up to 30 atoms not counting hydrogen and forming a Tt-complex with M. Most highly preferred Q groups are 1.4-diphenyl-1,3-butadiene, 1,3-pentadiene, 3-methyM ,3-pentadiene, 2,4-hexadiene, 1-phenyl-1,3-pentadiene, 1,4-dibenzyl-1,3-butadiene, 1,4-ditolyl-1,3-butadiene. 1,4-bis{trimethylsilyl)-1,3-butadiene. and 1,4-dinaphthyl-1,3-butadiene. Preferably in the foregoing formulas, R1 independently each occurrence is C1-4 alkyl, or phenyl more preferably methyl or isopropyl, most preferably methyl, Y1 and Y2 are both inden-1-yl, 2-alkyl-4-arylinden-1-yl, or3-alkylinden-1-yi, or Y1 is cyclopentadienyl or alkyl-substituted cyclopentadienyl and Y2 is fluorenyl; Z is boron and Q is halide, alkyl, N,N-dialkyl amido, or 1,4-diphenyl-1,3-butadiene (said alkyl or aryl groups having up to 10 carbons). Even more preferably in formulas 4a-c and 7a-c, M is zirconium or hafnium and R1 is methyl or isopropyl, most preferably methyl. During synthesis of these complexes, the use of methyl R1 groups gives elevated, often quantitive, yields of the rac isomer. In formulas 5a-c, 6a-c, 8a-c and 9a-c, M is even more preferably titanium, Z is boron and R1 is Ci-t alkyl or phenyl, most preferably methyl or isopropyl. Most highly preferred metal complexes are those of formulas 4a-c and 7a-c wherein Y1 and Y2are both inden-1-yl, 2-methyl-4-phenyrmden-1-yl, 3-isopropylinden-1-yl, or 3-t-butylinden-1-yl groups, especially compositions comprising greater than 90 percent rac isomer. Specific, but not limiting, metal complexes included with the invention described in the foregoing formulas are: dimethylamidoborane-bis-Ti’-cyclopentadienyl zirconium dichloride; dimethylamidoborane-bis-n5-cyclopentadienyl zirconium dimethyl; dimethylamidoborane-bis-Ti2-cyciopentadienyl zirconium bis-dlmethylamide; dimethylamidoborane-bis-Ti2-cyclopentadienyl zirconium 2-methyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-cyclopentadienyl zirconium 2,3-dimethyl-1.3-butadiene; dimethylamidoborane-bis-Ti’-cyclopentadienyl zirconium 2-N,N-dimethylaminobenzyl; dimethylamidoborane-bis-n’-cyclopentadienyl zirconium allyl; dimethylamidoborane-bis-r|’-cyclopentadienyl zirconium Ti'*-1,4-diphenyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-cyclopentadienyl zirconium •n'*-2.4-hexadiene; dimethylamidoborane-bis-ri’-cyclopentadienyl zirconium r|'‘-1,4-dinaphthyl-1,3-butadiene; dimethylamidoborane-bis-n’-cyclopentadienyl zirconium ri'‘-l-phenyl-1,3-pentadiene; dimethylamidoborane-bis-Ti’-cyclopentadienyl zirconium TI’-1 .3-pentadiene; dimethylamidoborane-bis-Ti’-n-butylcyclopentadienyl zirconium dichlorlde; dimethylamidoborane-bis-Ti’-n-butylcydopentadienyl zirconium dimethyl; d-methylamidoborane-bis-n’-n-butylcyclopentadienyl zirconium bis-dimethylamide; dimethylamidoborane-bis-Ti’-n-butylcyclopentadienyl zirconium 2-methyt-1,3-butadiene; dimethylamidoborane-bis-Ti’-n-butylcydopentadienyl zirconium 2,3-dimethyl-1,3-butadiene; dimethylamidoborane-bis-T|’-n-butylcyciopentadienyl zirconium 2-N,N-dimethylaminobenzyl; dimethylamidoborane-bis-Ti’-n-butyicyclopentadienyl zirconium allyl; dimethylamidoborane-bis-ri’-n-butylcyclopentadienyl zirconium TI'‘-I ,4-diphenyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-n-butylcyclopentadienyl zirconium V-2,4-hexadiene; dimethylamidoborane-bis-Ti’-n-butylcyclopentadienyl zirconium ti’-1,4-dinaphthyl-1,3-butadiene; dlmethylamidoborane-bis-Ti’-n-butylcyctopentadienyl zirconium ri'‘-l -phenyl-1,3-pentadiene; dimethylamidoborane-bis-ti’-n-butylcyclopentadienyl zirconium r|’-1.3- penta diene; -bis-T| - -bis-Ti’- bis-Tj’- bis-T|’- bis-n’- -bis-Ti’- -bis-ri’- dimethylamidoborane-bis-ri’- dimethylamidoborane dimethylamidoborane dimethylamidoborane dimethylamidoborane dimethylamidoborane dimethylamidoborane dimethylamidoborane -bis-n’--bis-Ti’- ■bis-n’-•bis-Ti’- butadiene; dimethylamidoborane butadiene; dimethylamidoborane dimethylamidoborane nden-1-ylzirconium dichloride; nden-1-ylzirconium dimethyl; nden-1 -ylzirconium bis-dimethylamide; nden-1-ylzirconium 2-methyl-1,3-butadiene; nden-1-ylzirconium 2.3-dimethyl-1,3-butadiene; nden-1 -ylzirconium 2-N,N-dimethylaminobenzyl; nden-1-ylzirconium allyl; nden-1-ylzirconium T|’-1 ,4-diphenyl-1.3- nden-1 -ylzirconium Ti'*-2,4-hexadiene; nden-1-ylzirconium r|*-1,4-dinaphthyl-1,3- nden-1 -ylzirconium TI’-1 -phenyl-1,3-pentadiene; riden-1-ylzirconium V-1.3-pentadiene; dimethylamidoborane-bis-Ti’-(2-methylinden-1 dimethylamidoborane-bis-Ti’-(2-methylinden-1 dimethylamidoborane-biS'n’-(2-methylinden-1 dimethylamidoborane-biS'n’-(2-methylinden-1 butadiene; dimethylamidoborane-biS'n’-(2-methylinden-1 butadiene; dimethylamidoborane-bis-'n’-(2-methylinden-1 dimethylaminobenzyl; dimethylamidoborane-bis-"n’-(2-methylinden-1 dimethylamidoborane-bis-ii’-(2-methylinden-1 1,3-butadiene; dimethylamidoborane-bis-'n’-(2-methylinden-1 dimethylamidoborane-bis-'n’-(2-methylinden-1 1,3-butadiene; -yl)zirconium dichloride; -yl)zirconium dimethyl; -yl)zirconium bis-dimethylamide; -yl)zirconium 2-methyl-1,3- -yl)zirconium 2,3-dimethyl-1.3- -yl)zirconium 2-N,N- -yl)zirconium allyl; -yl)zirconium T|’-1,4-diphenyl- -yl)zirconium ti'*-2.4-hexadiene; -yl)zirconium T|'*-1 ,4-dinaphthyl- dinnethylamidoborane-bis-r|’-(2-methylinden-1 -yl)zirconium TI'*-1 -phenyl-1,3-pentadiene; dimethylamidoborane-bis-'n’-(2-methylinden-1 -yl)zirconium TI’-1 ,3-pentadiene; dimethylamidoborane-bis-'n’-(2-methyl-4-phenylinden-1-yl)zirconium dichloride; dimethylamidoborane-bis-'n’-(2-methyl-4-phenylinden-1-yl)zirconium dimethyl; dimethylamidoborane-bis-n’-(2-methyl-4-phenylinden"1-yl)zirconium bis-dimethylamide; dimethylamidoborane-biS"Ti’-(2-methyl-4-phenylinden-1-yl)zirconium2-methyl-1,3-butadiene; dimethylamidoborane-bis-ri’-(2-methyi-4-phenylinden-1-yl)zirconium2,3-dimethyl-1,3-butadiene; dimethylamidoborane-bis-'n’-(2-methyl-4-phenylinden-1-yOzirconium 2-N,N-dimethyiaminobenzyl; dimethylamidoborane-bis-Ti’-(2-methyl-4-phenylinden-1-yl)zirconiumallyl; dimethylamidoborane-bis-Ti’-(2-mefriyl-4-phenyiinden-1 -yl)zirconium TI’-1 ,4-diphenyl-1,3-butadiene; dimethylamidoborane-bis-T|’-{2-mett’yl-4-phenylinden-1-yl)zirconiumTi'*-2,4-hexadiene; dimethylamidoborane-bis-Ti’-(2-methyl-4-phenyiinden-1 -yl)zirconium TJ’'-I ,4-dinaphthyl-1,3-butadiene; dimethylamidoborane-bis-ii’-(2-methyl-4-phenylinden-1 -yl)zirconium xy’-’ -phenyl-1,3-pentadiene; dimethylamidoborane-bis-Ti’-(2-methyl-4-phenylinden-1 -yl)zirconium ii’-l ,3-pentadiene; dimethylamJdoborane-bis-n’-(2-ethyl-4-phenylinden-1-yOzirconium dichloride; dimethylamidoborane-bis-Ti’-(2-ethyl-4-phenylinden-1-yl)zirconium dimethyl; dimethylamidoborane-bis-Ti’-(2-ethyl-4-phenylinden-1-yl)zirconiumbis- dimethylamide; dimethylamidoborane-bis-Ti’-(2-ethyl-4-phenyiinden-1-yl)zirconium2-methyl- 1,3-butadiene; dimethylamidoborane-bis-TiM2-ethyl-4-phenylinden-1-yl)zirconium2,3- dimethyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-(2-ethyi-4-phenylinden-1-yl)zirconium2-N,N-dimethylaminobenzyl; dirnethylamidoborane-bis-Ti’-(2-ethyl-4-phenylinden-1-yl)zirconiumallyI; dimethylamidoborane-bis-t’’-(2-ethyK"phenylinden-1-yl)zirconium|'*-1,4-diphenyl-1,3-butadiene; dimethylamidoborane-bis-r|’-(2-ethyl-4-phenylinden-1-yl)zirconium ‘"‘-2,4-hexadiene; dimethylamidoborane-bis-'n’-(2-ethyl-4-phenylinden-1 -yl)zirconium r[‘-1,4-dinaphthyl-1,3-butadiene; dimethylamidoborane-bis-r|’-(2-ethyl-4-phenylinden-1 -yl)2irconium TI'‘-I -phenyl-1,3-pentadiene; dimethylamidoborane-bis-Ti’-(2-ethyl-4-phenylinden-1-yl)zirconium V"1 »3- penta diene; dirnethylamidoborane-bis-Ti’-(2-isopropyl-4-phenylinden-1-yl)2irconiurTi dichloride; dimethylamidoborane-bis-Ti’-(2-isopropyl-4-phenylinden-1-yl)2irconium dimethyl; dimethylamidoborane-bis-ri’-(2-isopropyl-4-phenyiinden-1-yl)2irconiumbis-dimethylamide; dimethylamidoborane-bis-'n’-(2-isopropyl-4-phenylinden-1"yi)zirconium2-methyl-1,3-butadiene; dimethylamidoborane-bis-T|’-(2-isopropyl-4-phenylinden-1-yl)zirconium 2,3-dimethyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-(2-isopropyl-4-phenylinden-1-yl)zirconium2-N,N-dimethylaminobenzyi; dimethylamidoborane-bis-Ti’-{2-isopropyl-4-phenylinden-1-yl)zirconium)allyl; dimethylamidoborane-bis-Ti’-(2-isopropyl-4-phenylinden-1 -yl)zirconium ‘‘-’ ,4-diphenyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-(2-isopropyl-4-phenylinden-1-yl)zirconium)*-2,4-hexadiene; dimethylamidoborane-bis-Ti’-{2-isopropyl-4-phenylinden-1 -yl)zirconium T’’-I .4- dinaphthyl-1,3-butadiene; dimethylamidoborane-bis-ti’-(2-isopropyl-4-phenylinden-1 -yl)zirconium TI’’-I - phenyl-1,3-pentadiene; dimethylamidoborane-bis-T|’-(2-isopropyl-4-phenylinden-1 -yl)zirconium TI'‘-1 ,3-pentadiene; dimethylamidoborane-bis-'n’-(2-methyl-4-naphthylinden-1-yl)zirconium dichloride; dimethylamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)2irconiurn dimethyl; dimethylamidoborane-bis-ri’-(2-methyl-4-naphthylinden-1-yl)zirconium bis-dimethylamide; dimethylamidoborane-bis-Ti’-(2-methyi-4-naphthylinden-1-yl)zirconium2-methyl-1,3-butadiene; dimethylamidoborane-bis-'n’-(2-methyl-4-naphthylinden-1-yl)zirconium2,3-dimethyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)zirconium2-N,N-dimethylaminobenzyl; dimethylamidoborane-bis-'n’-(2"methyl-4-naphthyiinden-1-yl)zirconiumallyl; dimethylamidoborane-bis-ti’-(2-methyl-4-naphthylinden-1 -yl)zirconium ii’-1,4-diphenyl-1,3-butadiene; dimethylamidoborane-bis-n’-(2-methyl-4-naphthylinden-1-yl)zirconiumTi'*-2,4-hexadiene; dimethylamidoborane-bis-'n’-(2-methyl-4-naphthylinden-1 -yl)zirconium ti’’-l ,4- dinaphthyl"1.3-butadiene; dimethylamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1 -yl)zirconium TI’-1 - phenyl-1,3-pentadiene; dimethylamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1 -ylzirconium TI"*-! ,3-pentadiene; dimethylamidoborane-bis-Ti’-(2-methyl-4-bis(3,5-trifluoromethyl)phenylinden- 1-yl)zirconium dichloride; dimethylamidoborane-bis-Ti’-(2-methyl"4-bis(3,5-trifluoromethyl)phenylinden- 1 -yl)zirconium dimethyl; dimethylamidoborane-bis-Ti’-(2-methyl-4-bis(3,5-trifluoromethyl)phenylinden- 1-yl)zirconium bis-dimethylamide; dimethylamidoborane-bis-'n’-(2-methyl-4-bis(3,5-trifluoromethyl)phenylinden- 1-yl)2irconium 2-methyl-1,3-butadiene; dimethylamfdoborane-bis-’’K2-niethyl-4-bis(3,5-trifluoromethyl)phenyl 1-yi)2irconium 2,3-dimethyl-1.3-butadiene; dimethylamidoborane"bis-r|’-(2-me%M-bis(3,5"triftuoromethyl)pheny(inden-1 -ylzirconium 2-N,N-dimethylaminoben2yl; dimethylamidoborane-bis-Ti’-(2-methyM-bis(3,5-trifluoromethyl)phenylinden-1"yl)2irconiumallyl; dimethylamidoborane-bis*ti’-(2-methyl"4-bis{3,5-trifluorornethyl)phenyiinden-1 -yl)2irconium TI’’-I ,4-diphenyl-1,3-butadiene; dimethylamidoborane-bis*Ti’-(2"methyl-4-bis(3,5-trifluoromethyl)phenylinden-1 "yl)2irconium Ti'*-2,4-hexadiene; dimethylamidoborane-bis-Ti’-(2-methyl-4-bis(3,5-trifiuoromethyl)phenylinden-1 -ylzirconium r{‘-’ ,4-dinaphthyl-1,3-butadiene; d(methylamidoborane-bis-Ti’-(2-methyl-4-bis(3,5-trifluoromethyl)phenylinden-1 -ylzirconium TI’’-I -phenyl-1,3-pentadiene; dimethylamidoborane-biS"Ti’-(2-methyl-4-bis(3,5-trifiuoromethyl)phenylinden-1 -ylzirconium TI'-1 ,3-pentadiene; dimethylamidoborane-bis-Ti’-(2-ethyl-4-bis(3,5-trifluoromethyOphenylinden-1-yOzirconium dichloride; dimethylamidoborane-bis-ri’-(2-ethyl-4-bis(3,5-trifluoromethyOphenylinden-1-yOzirconium dimethyl; dimethyiamidoborane-bis-T|’-(2-ethyl-4-bis(3,5-trifluoromethyOphenyiinden-1- yl)2irconium bis-dimethylamide; dimethylamidoborane-bis-Ti’-(2-ethyl-4-bis(3,5-trjfluoromethyOphenylinden-1- yOzirconium 2-methyl-1.3-butadiene; dimethylamidoborane-brs-r]’-(2-ethyM-bis(3,5-trifluoromethyOpbenyiinden-1- yOzirconium 2,3-dimethyl-1,3-butadiene; dimethylamidoborane-bis-ti’-(2-ethyl-4-bis(3,5-trifluoromethyOphenyt(nden-1- y02irconium2-N,N-dimethylaminobenzyl; dimethylamidoborane-bis-ii’-(2-ethyl-4-bis(3,5-trifluoromethyOphenylinden-1- yOzirconium allyl; dimethylamidoborane-bis-Ti’-(2-ethyl-4-bis(3,5-trifluoromethyOphenylinden-1- yOzirconium TI'‘-I ,4-diphenyl-1,3-'butadiene; dimethylamidoborane-bis-r|’-(2-ethyl-4-bis(3,5-trifluoromethyl)phenylinden-1 yl)zirconium Ti’-2,4-hexadiene; dimethylamidoborane-bis-Ti’"(2-ethyl-4-bis(3,5-trifluoromethyl)phenylinden-1 yl)zirconium n'*-1,4-dinaphthyl-1,3-butadiene; dimethylamidoborane"bis-ri’-(2-ethyl-4-bis(3,5-trifluoromethyl)phenylinden-1 yOzirconium r|’-1 -phenyl-1,3-pentadiene; dimethylarnidoborane-bis-Ti’-(2-ethyl-4-bis(3,5-trifluoromethyl)phenylinden-1 yl)zirconium ri'‘-I.S-penta diene; dimethylamidoborane-bis-'n’-(2-isopropyl-4-bis(3,5-trifluoromethyl)phenylinden-1 -yl)zirconium dichioride; dimethylamidoborane-bis-'n’-(2-isopropyl-4 -bis(3,5-trifluoromethyl)phenylinden-1 -yl)zirconium dimethyl; dimethylamidoborane-biS"Ti’-(2-isopropyl-4-bis(3,5-trifluoromethyl)phenylinden-1 -yl)zirconium bis-dimethylamide; dimethylamidoborane-bis-n’-(2-isopropyl-4-bis(3,5-trif luoromethyl)phenylinden"1 -yl)zirconium 2-methyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-(2HSopropyl-4-bis(3,5-trifliioromethyl)phenylinden-1 -yl)zirconium 2,3-dimethyl-1,3-butadiene; dimethylamidoborane-bis-r|’-(2HSopropyl-4-b(s(3,5-trifluoromethyl)phenylinden-1-yl)zirconium2-N,N-dimethylaminobenzyl; dimethylamidoborane-bls-'n’-(2Hsopropyl-4-bis(3,5-trif luoromethyl)phenylinden-1 -yl)zirconium allyl; dimethylamidoborane-bis-n’-(2-isopropyl-4-bis(3,5-tiifluoromethyl)phenylinden-1 -yl)zirconium V-1,4-diphenyl-1,3-butadiene; dimethyiamldoborane-bis-ti’-{2-isopropyl-4-bls(3.5-trifluoromethyl)phenylinden-1 -yl)zirconium Ti’-2,4-hexadiene; dimethylamidoborane-bis-ti’-(2-isopropyl-4-bis(3,5-trifluoromethyl)phenylinden-1 -yl)zirconium ‘-1,4-dinaphthyl-1.3-butadiene; dimethylamidoborane-bis-'n’-{2HSOpropyl-4-bis(3,5-trifiuoromethyl)phenylinden-1 -yl)zirconium TI"*-! -phenyl-1,3-pentadiene; dimethylamidoborane-bis-Ti’-(2-isopropyl-4-bis(3,5-tiifluoromethyl)plienylinden-1 -yl)zirconium n’-l ,3-pentadiene; dimethylamidoborane-bis-Ti’-(3HSopropylinden-1-yl)zirconiumdichloride; dimethylamidoborane-bis-Ti’-(3-isopropylinden-1-yl)zirconium dimethyl; dimethylamidoborane-bis-'n’-(3-isopropylinden-1-yl)zirconiumbis-dimethylamide; dimethylamidoborane-bis-Ti’-(3-isopropylinden-1 -yi)zirconium 2-methyl-1.3-butadiene; dimethylamidoborane-bis-r|’-(3-isopropylinden-1-yl)zirconium2,3-dimethyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-(3-isopropylinden-1-yl)zirconium2-N,N-dimethylaminobenzyl; dimethylamidoborane-bis-Ti’-(3-isopropylinden-1-yl)zirconiumaltyl; dimethylamidoborane-bis-ii’-(3-isopropylinden-1 -yl)zirconium TI’-1 ,4-diphenyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-(3-isopropylinden-1-yl)zirconium 11’-2.4-hexadiene; dimethylamidoborane-bis-ti’-(3-Jsopropylinden-1 -yl)zirconium T|'*-1 ,4-dinaphthyl-1,3-butadier3; dimethylamidoborane-bis-Ti’-(3-isopropylinden-1 -yl)zJrconium T)'*-1 -phenyl-1,3-pentadiene; dimethylamidoborane-bis-Ti’-(3-isopropylinden-1 -yl)zirconium TI'‘-I ,3-pentadiene; dimethyiamidoborane-bis-Ti’-(3-t-butylinden-1-yl)zirconiumdichloride; dimethylamidoborane-bi>Ti’-(3-t-butylinden-1-yl)zirconium dimethyl; dimethylamidoborane-bis-ti’-(3-t-butylinden-1-yl)zirconiumbis-dimethylamide; dimethylamidoborane-bis-Ti’-(3-t-butyiinden-1 -yl)zirconium 2-methyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-(3-t-butynnden-1 -yl)zirconium 2,3-dimethyl-1.3-butadiene; dimethylamidoborane-bis-Ti’-(3-t-butylinden-1 -yl)zirconium 2-N,N-dimethylaminobenzyl; dimethylamidoborane-bis V-(3-t-butylinden-1 -yl)zirconium allyl; dimethylamidoborane-bisV-(3-t-butylinden-1 -yl)zirconium TI’-1 ,4-diphenyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-(3-t-butylinden-1-yl)zirconiumT|’-2,4-hexadiene; dimethylamidoborane-bis-Tj’-(3-t-butylinden-1 -yl)zirconium TI’-1 ,4-dinaphthyl-1,3-butadiene; dimethylamidoborane-bis-ri’-(3-t-butylinden-1 -yl)zirconium r[‘-1 -phenyl-1,3-pentadiene; dimethylamidoborane-bis-n’-(3-t-butyrmden-1 -yl)2irconium TI'‘-I ,3-pentadiene; diisopropylamidoborane-bis-Ti’-cyclopentadienylzirconium dichloride; diisopropylamidoborane-bis-Ti’-cyciopentadienylzirconium dimethyl; diisopropylamidoborane-bis-'n’-cyclopentadienyizirconium bis-dimethyiamide; diisopropylamidoborane-bis-Ti’-q’clopentadienylzirconium2-methyl-1,3-butadiene; diisopropylamidoborane-bis-'n’-cyclopentadienylzirconium2,3-dimethyl-1,3-butadiene; diisopropylamidoborane-bis-ii’-cyclopentadienylzirconium2-N,N-dimethylaminobenzyl; diisopropylamidoborane-bis-Ti’-cyclopentac’enylzirconiumallyl; diisopropylamidoborane-bis-Ti’-cyclopentadienylzirconium -n’-l ,4-diphenyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-cyclopentadienylzirconiumT]'*-2,4-hexadiene; diisopropylamidoborane-bis-Ti’-cyciopentadienylzirconiumTi'*-1,4-dinaphthyl" 1,3-butadiene; diisopropylamidoborane-bis-T|’-cyclopentadienylzirconium r\’-’ -phenyl-1,3-pentadiene; diisopropylamidoborane-bis-Ti’-cyctopentadienylzirconiumTi’-1,3-pentadiene; diisopropylamidoborane-bis-Ti’-inden-1 -ylzirconium dichloride; diisopropylamidoborane-bis-Ti’-inden-1 -ylzirconium dimethyl; diisopropyiamidoborane-bis-Ti’-inden-1-ylzirconiumbis-dimethylamide; diisopropylamidoborane-bis-Ti’-inden-1 -ylzirconium 2-methyl-1,3-butadiene; diisopropyiamidoborane-bis-ii’-inden-1 -ylzirconium 2,3-dimethyl-1,3-butadiene; diisopropylamidoborane-bis-ti’-inden-1 -ylzirconium 2-N,N- dimethylaminobenzyl; diisopropylamidoborane-bis-n’-inden-1 -ylzirconium allyl; diisopropylamidoborane-bis-r|’-inden-1 -ylzirconium TI’-1 ,4-diphenyM ,3-butadiene; diisopropylamidoborane-bis-Ti’-indent-l-ylzirconium Ti'*-2,4-hexadiene; diisopropylamidoborane-bis-'n’-inden-1 -ylzirconium TI'*-! ,4-dinaphthyl-1,3-butadiene; diisopropylamidoborane-bis-T|’-inden-1 -ylzirconium T|’-1 -phenyl-1,3-pentadiene; diisopropylamidoborane-bis-r|’-inden-1 -ylzirconium TI'*-1 .3-pentadiene; diisopropylamidoborane-bis-Ti’-(2-methylinden-1-yl)zirconium dichloride; diisopropylamidoborane-bis-Ti’-(2-methylinden-1-yl)zirconium dimethyl; diisopropylamidoborane-bis-Ti’-(2-methylinden-1-yl)zirconiumbis-dimethylamide; diisopropylamidoborane-bis-T|’-(2-methylinden-1 -yl)zirconium 2-methyl-1,3-butadiene; diisopropylamidoborane-bis-ii®-(2-methylinden-1-yl)zirconium2,3-dimethyl-1,3-butadiene; diisopropylamidoborane'bis-Ti’-(2-methylinden-1-yl)zirconium2-N,N-dimetliylaminobenzyl; diisopropyiamidoborane-bis-'n’-(2-methylinden-1-yl)zirconium alkyl; diisopropylamidoborane-bis-n’-(2-methylinden-1 -yl)zirconium r\’'‘ ,4-diphenyl-1,3-butadiene; diisopropylamidoborane-bis-n’-(2-methylinden-1-yl)zirconiumii'*-2,4-hexadiene; diisopropylamidoborane-bis-Ti’-(2-methylinden-1 -yl)zirconium V-1.4-dinaphthyl-1,3-butadiene; diisopropylamidoborane-bis-'n’-(2-methylinden-1 -yl)zirconium TI"*-! -phenyl-1,3-pentadiene; diisopropylamidoborane-bis-Ti’-(2-methynnden-1 -yl)zirconium TI'*-1 ,3-pentadiene; diisopropylamidoborane-bis-rj’-(2-methyl-4-phenyiinden-1-yl)zirconium dichloride; diisopropylamidoborane-bis-T|’-(2-methyl-4-phenylinden-1-yl)zirconium dimethyl; diisopropylamidoborane-bis-Ti’-(2-methyl-4-phenyrmden-1"yl)zirconium bis-dimethylamide; diisopropylamidoborane-bis-'n’-(2-methyl-4-phenyiinden-1-yl)zirconium2-methyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-(2-methyl-4-phenylinden-1-yl)zirconium2,3-dimethyl-1,3-butadiene; diisopropylamidoborane-bis-ii’-(2-methyl-4-phenylinden-1-yl)zirconium2-N.N-dimethylaminobenzyl; diisopropylamidoborane-bis-n’-(2-methyl-4-phenylinden-1-yl)zirconium allyl; diisopropylamidoborane-bis-T|’-(2-methyl-4-phenylinden-1 -yl)zirconium T|’-1 ,4-diphenyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-(2-methyl-4-phenylinden-1-y!)zirconiumTi'*-2,4-hexadiene; diisopropyiamidoborane-brs-'n’-(2-methyl-4-phenyiinden-1 -yl)zirconium ti'*-! .4-dinaphthyM .3-butadiene; diisopropylamidoborane-bis-ti’-(2-methyl-4-phenylinden-1 -yOzirconium V-1 -phenyl-1,3-pentadiene; diisopropylamidoborane-bis-Ti’-(2-methyl-4-phenylinden-1 -yi)zirconium 7i’-1,3-pentadiene; diisopropylamidoborane-bis-'n’-(2-methyl-4-naphthylinden-1-yl)zirconium dichloride; diisopropylamidoborane-bis-Ti’-(2-methyl-4-naphthyiinden-1-yl)zirconium dimethyl; diisopropylamidoborane-bis-Ti’-{2-methyl-4-naphthylinden-1-yl)zirconiumbis-dimethylamide; diisopropylamidoborane-bisV"(2-methyl-4-naphthyiinden-1-yl)zirconium2-methyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)zirconium2,3- dimethyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-{2-methyl-4-naphthylinden-1-yl)zirconium2- N,N-dimethylaminobenzyl; diisopropylamidoborane-bis-'n’-(2-methyl-4-naphthylinden-1-yl)zirconium allyl; diisopropylamidoborane4)is-Ti’-{2-methyl-4-naphthylinden-1"yl)zirconiumTj'*-1,4"diphenyl'1,3-butadiene; diisopropytamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)zirconiumTi'*-2,4-hexadiene; diisopropylamidoborane-bis-n’-(2-methyl-4-naphthylinden-1-yl)zirconium r\’-1,4"dinaphthyl-1,3-butadiene; dirsopropylamidoborane-bis-'n’-(2-methyl-4-naphthylinden-1-yl)zirconiumTi’-1 phenyl-1.3-pentadiene; diisopropylamidoborane-bis-r|’-{2-methyl-4-naphthylinden-1-yl)zirconiumr|'*" 1,3-pentadiene; diisopropylamidoborane-bis-Ti’-(2-methyl-4-(3,5-dimethylphenyl)inden-1-yl)zirconium dichloride; diisopropylarnidoborane-bis-Ti’-(2-methyl"(3,5-dirnethylphenyl)inden-1-yl)zirconium dimethyl; diisopropylamidoborane-bis-Ti’-(2-methyl-4-(3,5-dimethylphenyl)inden-1-yOzirconium bis-dimethylamide; diisopropylamrdoborane-bis-Ti’-(2-methyl-4-(3,5-dimethylphenyl)lnden-1-yl)zirconium 2-methyl-1,3-butadiene; diisopropylamldoborane-bis-Ti’-(2-methyl-4*(3,5-dimethylphenyl)inden-1-yl)zirconium 2,3-dimethyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-(2-methyl-4-(3,5-dimethylphenyi)inden-1-yl)zirconium2-N,N-dimethylaminobenzyi; diisopropylamidoborane-bis-Ti’-(2-methyl-4-{3,5-dimethylphenyl)inden-1-yl)zirconium allyl; diisopropylamidoborane-bis-Ti’-(2-methyM-(3,5-dimethylphenyl)inden-1-yl)zirconium T’’-I ,4-diphenyl-1,3-butadiene; diisopropylamidoborane-bis-ti’-(2-methyl-4-(3,5-dimethylphenyl)inden-1-yl)zirconium Ti'*-2,4-hexadiene; diisopropylamldoborane-bis-'n’-(2-methyl-4-(3,5-dimethylphenyl)inden-1-yl)zirconium •n'*-1,4-dinaphthyl-1.3-butadlene; diisopropylamidoborane-bis-Ti’-(2-methyl-4-(3,5-dimethylphenyl)inden-1-yl)zirconium T’’-1-phenyl-1,3-pentadiene; diisopropylamidoborane-bis-Ti’-(2"methyl-4-{3,5-dimethylphenyl)inden-1" yl)2irconium Ti’-1,3-pentadiene; diisopropylamidoborane-bis-Ti’-(2-methyl-4-(3,5 diisopropylamidoborane-bis-Ti’-(2-methyl-4-{3,5-difluoromethylphenyl)inden-1-yl)zirconium dimethyl; diisopropylamidoborane-bis-Ti’-{2-methyl-4-(3,5-difluoromethylphenyl)inden-1-yl)zirconium bis-dimethylamide; diisopropylamidoborane-bis-Ti’-{2-methyl-4-(3,5-difluoromethylphenyl)inden-1-yl)zirconium 2-methyl-1,3-butadiene; diisopropylamidoborane-bis-'n’-(2-methyl-4-(3,5-difluorDmethylphenyl)inden-1-yl)zirconium 2,3-dimethyl-1,3-butadiene; diisopropylamidoborane-bis-T]’-(2-methyl-4-(3,5-difluoromethylphenyi)inden-1-yl)zirconium2-N,N-dimethylaminobenzyl; diisopropylamidoborane-bis-n’-(2-methyl-4-(3,5-difluoromethylphenyi)inden-1-yl)zirconium allyl; diisopropylamidoborane-bis-Ti’-(2-methyl-4-(3,5-difluoromethylphenyl)inden-1-yl)zirconium r’’-’ ,4-diphenyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-(2"methyl-4-(3,5-difluoromethylphenyl)rnden-1-yl)zirconium Ti'*-2.4-hexadiene; diisopropylamidoborane-bis-r|’-(2-methyl-4-(3,5-difluoromethylphenyl)inden-1-yl)zirconium Ti'*-1,4"dinaphthyl-1,3-butadiene; diisopropylamidoborane-bis-'n’-(2-methyl-4-(3,5-difluoromethylphenyl)inden-1-yl)zirconium TI'*-1 -phenyl-1.3-pentadiene; diisopropyiamidoborane-bis-r|’-(2-methyl-4-(3,5-difluorDmethylphenyl)inden" 1 -yl)zirconium TI’-1 ,3-pentadiene; diisopropylamidoborane-bis-ii’-(2-ethyl-4-phenylinden-'1-yl)zirconium dichloride; diisopropylamidoborane-bis-Ti’-(2-ethyl-4-phenylinden-1"yl)zirconium dimethyl; diisopropylamidoborane-bis-Ti’-(2-ethyl-4-phenylinden-1-yl)2irconium bis-dimethylamide; diisopropylamidoborane-bis-T|’-(2-ethyl-4-phenyiinden-1-yl)zirconium2-methyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-(2-ethyM-phenyl(nden-1-yl)zirconium2,3-dimethyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-(2-ethyl-4-phenylinden-1-yl)zirconium2-N,N-dimethylaminobenzyl; diisopropyiamidoborane-bis-ii’-{2-ethyi-4-phenylinden-1-yl)2irconiumallyl; diisopropylamidoborane-bis-Ti’-(2-ethyl-4-phenylinden-1 -yl)zirconium ri'‘-1,4-diphenyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-(2-ethyl-4-phenylinden-1-y()zirconium V-2,4-hexadiene; diisopropylamidoborane-bis-ii’-(2-ethyl-4-phenylinden-1 -yl)zirconium TI’-1 ,4-dinaphthyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-{2-ethyl-4-phenylinden-1 -yl)zirconium r\’'1 -phenyl-1,3-pentadiene; diisopropylamidoborane-bis-Ti’-(2-ethyl-4-phenylinden-1 -yl)zirconium TI’-1 .3-pentadiene; diisopropylamidoborane-bis-Ti’-(2-isopropyl-4-phenylinden-1-yl)zirconium dichloride; diisopropylamidoborane-bis-Ti’-{2-isopropyM-phenylinden-1-yl)zirconium dimethyl; diisopropylamidoborane-bis-n’-(2-isopropyl-4-phenylinden-1-yl)zirconiumbis-dimethylamide; diisopropylamidoborane-bis-Ti’-(2-isopropyl-4-phenylinden-1-yl)zirconium2-methyl-1,3-butadiene; diisopropylamidoborane-bis-'n’-(2-isopropyl-4-phenylinden-1-yl)zirconium2,3-dimethyl-1,3-butadiene; diisopropylamidoborane-bis-T|’-(2-isopropyl-4-phenylinden-1-yl)zJrconium2-N,N-dimethylaminobenzyl; diisopropylamidoborane-bis-Ti’-(2-isopropyl-4-phenylJnden-1-yl)zirconiumallyl; diisopropylamidoborane-bis-7i’-(2-isopropyl-4-phenylinden-1-yl)zirconium'n'*-1,4-diphenyl-1.3-butadiene; diisopropylamidoborane-bis-'n’-(2-isopropyl-4-phenyiinden-1-yl)zirconiumTi'*-2,4-hexadJene; diisopropylamidoborane-bis-Ti'*-(2-isopropyl-4-phenylinden-1-yl)zirconiumr|'*-1,4-dinaphthyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’"(2-isopropyl-4-phenylinden-1-yl)2irconiurnr|'*-1 -phenyl-1,3-pentadiene; diisopropyiamidoborane-bis-Ti’-(2-isopropyl-4-phenylinden-1-yl)zirconium'n’-1,3-pentadiene; diisopropylam!doborane-bis-'n’-(3"isopropylinden-1-yl)zirconium dichloride; diisopropylamidoborane-bis-'n’-(3-isopropylinden-1-yl)zirconium dimethyl; diisopropylamidoborane-bis-Ti’-{3-isopropyiinden-1-yl)zirconium bis-dimethytamide; diisopropylamidoborane-bis-ii’-(3-isopropyllnden-1 -yl)zirconium 2-methyl-1,3-butadiene; diisopropylamidoborane-bis-'n’-(3-isopropylinden-1-yl)zirconium 2,3-dimethyl-1,3-butadiene; diisopropylamidoborane-bis-T|’-(3-isopropylinden-1-yl)zirconium2-N,N-dimethylaminobenzyl; diisopropylamidoborane-bis-Ti’-(3-isopropylinden-1-yl)zirconiumallyl; diisoprDpylamidoborane-bis-Ti’-(3-lsopropylinden-1 -yl)zirconium TI’-1 ,4- diphenyl-1,3-butadiene; diisopropylamidoborane-bis-n’-(3-isopropylinden-1-yl)zirconiumTj'*-2,4- hexadiene; diisopropylamidoborane-bis-'n’-(3-isopropylinden-1 -yl)zirconium r|'*-1,4-dinaphthyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-(3-isopropylinden-1 -yl)zirconium TI'‘-I -phenyl-1,3-pentadiene; diisopropylamidoborane-bis-ii’-(3-isopropylinden-1 -yl)zirconium t’’’-l ,3-pentadiene; diisopropylamidoborane-bis-Ti’-(3-t-butylinden-1-yl)zirconium dichloride; diisopropylamidoborane-bis-Ti’-(3-t-butylinden-1-yl)zirconium dimethyl; diisopropylamidoborane-bis-Ti’-(3-t-butylinden-1-yl)zirconiumbis- dimethylamlde; diisopropyiamidoborane-bls-Ti’-(3-t-butylinden-1 -yl)zirconium 2-methyl-1,3-butadiene; diisopropylamidoborane-bis-'n’-(3-t-butylinden-1 -yl)zirconium 2,3-dimethyl-1,3-butadiene; diisopropylamidoborane-bis-'n’-(3-t-butylinden-1-yl)zirconium2-N,N-dimethylaminobenzyl; diisopropylamidoborane-bis-'n’-(3-t-butylinden-1-yl)zirconium allyl; diisopropylamidoborane*bis-ii’-(3-t-butylinden-1 -yl)2irconium -’’-l ,4-diphenyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-(3-t-butylinden-1-yl)zirconium TI’-2.4-hexadiene; diisopropylamidoborane-bis-ti’-(3-t-butylinden-1 -yl)zirconium t)'*-! ,4-dinaphthyl-1,3-butadiene; diisopropylamidoborane-bis-n’-(3-t-butylinden-1 -yl)zirconium V-1 -phenyl-1,3-pentadiene; diisopropylaniidoborane*bis-r|’-(3-t-butylinden-1 -yl)zirconium ri"*-! ,3-pentadiene; diphenylamidoborane-bis-Ti’-cyciopentadienyl zirconia. dichloride; diphenylamidoborane-bis-Ti’-cyclopentadienyl zirconium dimethyl; diphenylamidoborane-bis-r|’-cyclopentadienyl zirconium biS"dimetiiylamide; diphenylamidoborane-bis-r|’-cyclopentadienyl zirconium 2-methyl-l ,3-butadiene; diphenylamidoborane-bis-Ti’-cyclopentadienyl zirconium 2,3-dimethyl-1,3-butadiene; diphenytamidoborane-bis-ri’-cyclopentadienyl zirconium 2-N,N-dimethylaminobenzyl; diphenylamidoborane-bis-Ti’-cyclopentadienyl zirconium allyl; diphenylamidoborane-bis-n’-cyclopentadienyl zirconium V-1,4-diphenyl-1,3-butadiene; diphenyiamidoborane-bis-Ti’-cyclopentadienyl zirconium Ti’-2,4-hexadiene; diphenylamidoborane-bis-Ti’-cyclopentadienyl zirconium T’’-1 ,4-dinaphthyl-1,3-butadiene; diphenylamidoborane-bis-ti’-cyclopentadienyl zirconium V-1-phenyl-1,3-pentadiene; diphenylamidoborane-bis-'n’-cyclopentadienyl zirconium TI’-1 ,3-pentadiene; diphenylamrdoborane-bis-'n’-n-butylcyclopentadienyl zirconium dichloride; diphenylamidoborane-biS"Ti’-n-butylcyclopentadienyl zirconium dimethyl; diphenylamidoborane-bis-n’-n-butylcyclopentadienyl zirconium bis-dimethylamide; diphenyiamidoborane-bis-n’-n-butylcyclopentadienyl zirconium 2-methyi-1,3-butadiene; diphenylamidoborane-bis-Ti’-n-butylcyclopentadienyl zirconium 2,3-dimethyl-1.3-butadiene; diphenylamidoborane-bis-Ti’-n-butylcyclopentadienyl zirconium 2"N,N-dimethylaminobenzyl; diphenylamidoborane-bis-Ti’-n-butylcyclopentadienyl zirconium allyl; diphenylamidoborane-bis-Ti’-n-butyJcyclopentadienyl zirconium r]’'‘ A-diphenyl-1,3-butadiene; diphenylamidoborane-bis-Ti’-n-butylcyclopentadienyl zirconium r\’'2A-hexadiene; diphenyiamidoborane-bis-Ti’-n-butylcyciopentadienyl zirconium TI’’-I ,4-dinaphthyl-1,3-butadiene; diphenylamidoborane-bis-ti’-n-butyicyclopentadienyl zirconium r|’-1 -phenyl-1,3-pentadiene; diphenylamidoborane-bis-Ti’-n-butylcyclopentadienyl zirconium TI’-1 ,3-pentadiene; diphenylamidoborane-bis-Ti ‘-inden-1 -ylzirconium dichloride; nden-1-ylzirconium dimethyl; nden-1 -ylzirconium bis-dimethylamide; nden-1-ylzirconium 2-methyl-1,3-butadiene; nden-1-ylzirconium 2,3-dimethyl-1,3-butadiene; nden-1 -ylzirconium 2-N,N-dimethylaminobenzyl; nden-1-ylzirconium allyl; nden-1-ylzirconium V"*! ,4-diphenyl-1,3- diphenylamidoborane-bis-Ti’-diphenylamidoborane-bis-r|’-diphenylamidoborane-bis-Ti’-diphenylamidoborane-bis-ti’-diphenylamidoborane-bis-Ti’-diphenylamidoborane-bis-Ti’-diphenyiamidoborane-bis-Ti’-butadiene; diphenylamidoborane-bis-Ti’-inden-l-ylzirconium Ti’-2,4-hexadiene; diphenylamidoborane-bis-'n’-inden-1 -ylzirconium TI'‘-I ,4-dinaphthyl-1,3-butadiene; diphenylamidoborane-bis-n’-inden-1 -ylzirconium TI'‘-I -phenyl-1,3-pentadiene; diphenylamidoborane-bis-Ti’-inden-l -ylzirconium TI’’-I ,3-pentadiene; diphenylamidoborane-bis-Ti’-(2-methylinden-1-yl)zirconiumdichioride; diphenylamidoborane-bis-n’-(2-methylinden-1-yl)zirconium dimethyl; diphenylamidoborane-bis-n’-(2-methylinden-1-yl)zirconium bis-dimethylamide; diphenyiamidoborane-bis-Ti’-(2-methylinden-1 -yl)zirconium 2-methyl-1,3-butadiene; diphenylamidoborane-bis-'n’-(2-methylinden-1 -yl)zirconium 2,3-dimethyl-1,3-butadiene; diphenylamidoborane-bis-T|’-(2-methylinden-1 -yl)zirconium 2-N,N-dimethylaminobenzyl; diphenylamidoborane-bis-r|’-{2-methylinden-1-yl)zirconiumallyl; diphenylamidoborane-bis-Ti’-(2-methylinden-1 -yl)zirconium -q’-l ,4-diphenyl-1,3-butadiene; diphenylamidoborane-bis-T\’-(2-methylinden-1-yl)zirconiumV-2,4-hexadiene; diphenylamidobcrane-bis-Ti’-(2-methylinden-1 -yi)zirconium TI’-1 ,4-dinaphthyl-1,3-butadiene; diphenylamidoborane-bis-Ti’-(2-methylinden-1 -yl)zirconium ri'‘-l -phenyl-1,3-pentadiene; diphenylamidoborane-biS"Ti’-(2-methylinden-1 -yl)zirconium T’’-I ,3-pentadiene; diphenylamidoborane-bis-n’-{2-methyl-4-phenylinden-1-yl)zirconium dichloride; diphenylamidoborane-bisT|’-{2-methyl-4-phenyiinden-1-yl)zirconium dimethyl; diphenylamidoborane-bis-Ti’-(2-methyl-4-phenylinden-1-yl)zirconium bis-dimethylamide; diphenylamidoborane-bis-Ti’-(2-methyl-4-phenylinden-1-yl)zirconium2-methyl- 1,3-butadiene; diphenylamidoborane-bis-Ti’-(2-methyl-4-phenylinden-1-yl)zirconium2,3- dimethyl-1,3-butadiene; diphenyiamidoborane-bis-ti’-(2-methyl-4-phenyllnden-1-yl)zirconium2-N,N-dimethylaminobenzyl; diphenylamidoborane-bis-'n’-(2-methyl-4-phenylinden-1-yl)zirconiumallyl; diphenylamidoborane-bis-r|’-(2-methyM-phenylinden-1 -yl)zirconium T)'*-! ,4-diphenyl-1,3-butadiene; diphenylamidoborane-bis-'n’-(2-methyM-phenylinden-1-yl)2irconium TI'‘-2,4-hexadiene; diphenylamidoborane-bis-'n’-(2-methyl-4-phenylinden-1 -yl)zirconium TI'‘-I ,4-dinaphthyl-1,3-butadiene; diphenylamidoborane-bis-Ti’-(2-methyl-4-phenylinden-1 -yl)zirconium V-1 -phenyl-1,3-pentadiene; diphenylamidoborane-bis-Ti’-(2"methyl-4-phenylinden-1 -yl)zirconium TI’-1 ,3-pentadiene; diphenylamidoborane-bis-Ti’-(2-ethyl-4-phenyiinden-1-yl)zirconiumdichloride; diphenyiamidoborane-bis-Ti’-{2-ethyl-4-phenylinden-1-yl)zirconium dimethyl; dipheny!amidoborane-bis-T|’-(2-ethyl-4-phenylirden-1-yl)zirconiumbis-dimethylamide; diphenylamidoborane-bis-Ti’-{2-ethyl-4-pheny linden-1-yl)zirconium2-methyl-1,3-butadiene; dJphenylamidoborane-bis-Ti’-(2-ethyl-4-phenylinden-1-yl)zirconium2,3-dimethyi-1,3-butadiene; diphenylamidoborane-bis-Ti’-(2-ethyl-4-phenytinden-1-yl)zirconJum2-N,N-dimethylaminobenzyl; diphenyiamidoborane-bis-Ti’-{2-ethyl-4-phenylinden-1-yl)zirconium ally!; diphenyiamidoborane-bis-Ti’-(2-ethyl-4-phenyiinden-1 -yl)zirconium r|’-1,4-diphenyl-1,3-butadiene; diphenylamidoborane-bis-Ti’-(2-ethyl-4-phenylinden-1-yl)zirconium TI'‘-2,4-hexadiene; diphenylamldoborane-bis-ti’-(2-ethyl-4-phenylinden-1 -yl)zirconium TI’-I ,4- dinaphthyl-1,3-butadiene; diphenylamidoborane-bis-ti’-(2-ethyl-4-phenylinden-1-yl)zirconium'n'*-1- phenyl-1.3-pentadiene; diphenylamidoborane-bis-Ti’-(2-ethyl-4-phenylinden-1-yl)zirconiumTi'‘-1,3-pentadiene; diphenylamidoborane-bis-Ti’-{2-isopropyl-4-phenyllnden-1-yl)zirconium dichloride; diphenyiamidoborane-bis-r|’-(2-isopropyl-4-phenylinden-1-yl)zirconium dimethyl; diphenylamidoborane-bis-T|’-(2-isopropyl-4-phenylinden-1-yl)zirconium bis-dimethylamide; diphenylamidoborane-bis-Ti’-(2-isoprQpyl-4-phenyiinden-1-yl)zirconium 2-methyl-1,3-butadiene; diphenylamidoborane-bis-r|’"(2-isopropyl-4-phenylinden-1-yl)zirconium2.3-dimethyl-1,3-butadiene; diphenylamidoborane-bis-Ti’-(2-isopropyl-4-phenylinden-1-yl)zirconium2-N,N-dimethylaminobenzyl; diphenylamidoborane-bis-n’-(2-isopropyl-4-pheny(inden-1-yl)zirconiumallyl; diphenylamidoborane-bis-Ti’-(2-isopropyl-4-phenylinden-1 -yl)zirconium TI’-1 ,4-diphenyl-1,3-butadiene; diphenylamidoborane-bis-Ti’-(2-isoprcpyl-4-phenylinden-1-yl)zirconium7i'*-2,4-hexadiene; diphenylamidoborane-bis-Ti’-(2-isoprDpyl-4-phenylinden-1 -yl)2irconium r’’-l ,4-dinaphthyl-1,3-butadiene; diphenylamidoborane-bis-T|’-(2-isopropyl-4-phenylinden-1 -yl)zirconium TI’’-I -phenyl-1,3-pentadlene; diphenylamidoborane-bis-'n’-(2-isopropyl-4-phenylinden-1 -yl)zirconium 'n'*-1,3-pentadiene; diphenylamidoborane-bis-'n’-{2-methyl-4-naphthylinden-1-yl)zirconium dichloride; diphenylamidoborane-bis-T|’-(2-methyl-4"naphthyl]nden-1-yl)zirconium dimethyl; diphenylamidoborane-biS"Ti’-(2-methyl-4-naphthylinden-1-yl)2irconiumbis- dimethylamide; diphenytamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yi)2irconium2- methyt-1,3-butadiene; diphenylamidoborane-bis-Ti’-{2-methyl-4-naphthylinden-1-yl)2lrconium2,3- dimethyl-1,3-butadiene; diphenylamldoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)zirconium2-N,N-dimethyiaminobenzyl; diphenylamidoborane-bis-ti’-(2-methyl-4-naphthylinden-1-yl)zirconiumallyl; diphenyiamidoborane-bis-ri’-(2-methyl-4-naphthylinden-1 -yl)zirconium r]*-’ ,4-diphenyl-1,3-butadiene; diphenylamidoborane-bis-'n’-(2-methyl-4-naphthylinden-1-yOzirconium Ti’-2,4-hexadiene; diphenylamidoborane-bis-ri’-(2-methyl-4-naphthylinden-1 -yl)zirconium TI’-1 ,4-dinaphthyl-1.3-butadiene; diphenylamidoborane-bis-ri’-(2-methyl-4-naphthylinden-1 -yl)zirconium TI’’-I -phenyl-1,3-pentadiene; diphenylamidoborane-bis-n’-(2-methyl-4-naphthylinden-1 -yl)zirconium TI’-1 ,3-pentadiene; dJphenylamidoborane-bis-ti’-(2-methyl-4-bis{3,5-trifluoromethyl)phenylinden-1-yl)zirconium dichloiide; diphenylamidoborane-bis ‘Ti’-(2-methyl-4-bis(3,5-trifluoromethyl)phenylinden-1 -yl)zirconium dimethyl; diphenylamidoborane-bis-Ti’-(2-methyl-4-bis(3,5-trjfluoromethyl)phenylinden-1 -yOzirconium bis-dimettiylamide; diphenylamidoborane-bis-Ti’-(2-methyl-4-bis(3,5-trifluoromethyOphenylinden-1 -yOzirconium 2-methyl-1.3-butadiene; diphenylamidoborane-bis-Ti’-(2-methyl-4-bis(3,5-trifluoromethyl)phenylinden-1 -yOzirconium 2,3-dimethyl-1,3-butadiene; diphenylamJdoborane-bis-'n’-(2-methyl-4-bis(3,5-trrfluoromethyOphenylinden-1 -yOzirconium 2-N,N-dimethylaminobenzyl; diphenylamidoborane-bis-Ti’-(2-methyl-4-bis(3,5-trifluoromethyl)phenylinden- 1 -yOzirconium allyl; diphenyiamidoborane-bis-'n’-(2-methyl-4-bis(3.5-trifluoromethyl)phenylinden- 1-yOzirconium V-1,4-diphenyl-1.3-butadiene; diphenylamidoborane-bis-Ti’-(2-methyl-4-bis(3,5-trif(uoromethyl)phenyiinden- 1-yOzirconium V"2,4-hexadiene; diphenylamidoborane-bis-Ti’-(2-methyl-4-bis(3,5-trifluoromethyl)phenylinden- 1-yOzirconium V-1,4-dinaphthyl-1,3-butadiene; diphenylamidoborane-bis-Ti’-(2-methyl-4-bis(3,5-trifluoromethyl)phenylinden-1 -yl)zirconium TI'‘-I -phenyl-1,3-pentadiene; diphenytamidoborane-bis-Ti’-(2-methyl-4-bis(3,5-trifluoromethyl)phenylinden-1 -yl)2irconium T|'‘-1 ,3-pentadiene; diphenylamidoborane-bis-n’-(2-ethyl-4-bis(3,5-trifluoromethyl)phenylinden-1-yl)zirconium dichloride; diphenylamidoborane-bis-Ti’-(2-ethyl-4-bis(3,5-trifluoromethyl)phenynnden-1-yl)2irconium dimethyl; diphenylamidoborane-bis-Ti’-(2-ethyl-4-bis(3,5-trifluoromethyl)phenylinden-1-yl)zirconium bis-dimethylamide; diphenylarnidoborane-bis-Ti’-(2-ethyl-4-bis(3,5-trifluoromethyl)phenylinden-1-yl)2irconium 2-methyl-1,3-butadiene; diphenylamidoborane"bis-n’-(2-ethy(-4-bis(3,5-trifluoromethyl)phenylinden-1-yl)2irconium 2,3-dimethyl-1,3-butadiene; diphenylamidoborane-bis-Ti’"(2-ethyl-4-bis(3,5-trifluoromethyl)phenylinden-1-yl)2irconium2-N,N-dimethylaminobenzyl; diphenylamidoborane-bis-Ti’-(2-ethyN4-bis(3,5-trifluorornethyl)phenylinden-1-yl)2irconium allyl; diphenylamidoborane-bis-'n’-(2-ethyl-4-bis(3,5-trifluoromethyi)phenylinden-1- yl)2irconium ri'*-1,4-diphenyl-1,3-butadiene; diphenylamidoborane-bis-Ti’-{2-ethyl-4-bis(3.5-trifluoromethyl)phenylinden-1- yl)2irconium ■n'-2,4-hexadiene; diphenylaniidoborane-bis-Ti’-(2-ethyl-4-bls(3,5-trifluoromethyl)phenylinden-1-yi)2irconium ‘‘-’ ,4-dinaphthyl-1,3-butadiene; diphenylamidoborane-bis-ti’-{2-ethyl-4-bis(3,5-trifluoromethyl)phenyiinden-1- yl)2irconium ii'‘-l-plainly-l ,3-pentadiene; diphenylamidoborane-bis-ti’-(2-etliyt-4-bis(3,5-trifluoromethyl)phenylinden-1- yl)2irconium TI'*-! ,3-pentadiene; diphenylamidoborane-bis-'n’-{2-isopropyl-4-bis(3,5-trifluoromethyl)phenylinden-1 -yl)2irconium dichloride; diphenylamidoborane-bis-Ti’-(2-isopropyl-4-bis(3,5-trifluoromethyl)phenyltnden-1 -yl)2irconium dimethyl; diphenylamidoborane-biS"Ti’-(2-isopropyl-4-bis(3,5-trifluoromethyl)phenylinden-1 -yOzirconium bis-dimethyiamide; diphenylamidoborane-bis-n’-{2-isopropyl-4-bis(3,5-trifluoromethyl)phenylinden-1 -yl)2irconium 2-methyl-1,3-butadiene; diphenylamidoborane-bis-'n’-{2"isopropyl-4-bis(3,5-trifluoromethyl)phenylinden-1 -yl)zirconium 2,3-dimethyl-1,3-butadiene; diphenylamidoborane-bis-Ti’-(2-isopropyi-4-bis(3,5-trifluoromethyl)phenylinden-1-yOzirconium 2-N,N-dimethylaminobenzyi; diphenylamidoborane-bis-r|’-(2-lsopropyl-4-bis(3,5-trifluoromethyl)phenylinden-1 -yOzirconium allyl; diphenylamidoborane-bis-Ti’-(2-isopropyl-4-bis(3,5-tiifiuoromethyOphenylinden-1-yOzirconium V'‘ .4-diphenyt-1,3-butadiene; diphenylamidoborane-bis-'n’-(2-lsopropyl-4-bis(3.5-trifluoromethyl)phenylinden-1 -yl)zirconium Ti'*-2,4-hexadiene; diphenylamidoborane-bis-Tj’-(2-isopropyl-4-bis(3,5-trifluoromethyOphenylinden-1-yOzirconium TI’-1 ,4-dinaphthyI-1,3-butadiene; diphenyiamidoborane-bis-'n’-(2-isopropyl-4-bis(3,5-trlf Iuoromethy0plienylinden-1 -yOzirconium V-1 -phenyl-1,3-pentadiene; dJphenylamidoborane-bis-n’-(2-isopropyl-4-bis(3,5-trifluoromethyl)phenyiinden-1-yOzirconium TI’-1 ,3-pentadiene; diphenylamidoborane-bis-Ti’-(3-isopropylinden-1-yOzlrconiumdichloride; diphenylamidoborane-bis-'n’-(3-isopropylinden-1-yl)zirconium dimethyl; diphenyiamidoborane-bis-Ti’-(3-isopropylinden-1 -yl)zirconium bis-dimethyiamide; diphenylamidoborane-bis-Ti’-{3-isopropylinden-1 -yOzirconium 2-methyl-1,3-butadiene; diphenylamidoborane-bis-Ti’-(3-isopropylinden-1-yl)zirconium2,3-dimethyl- 1,3-butadiene; diphenylamidoborane-bis-Ti’-(3-isopropylinden-1-yl)zirconium2-N,N- dimethylaminobenzyl; diphenylamidoborane-bis-Ti’-(3-isopropylinden-1-yOzirconium allyl; diphenylamidoborane-bis-ti’-(3-isopropyrinden-1 -yl)zirconium TI’-1 ,4-diphenyl- 1,3-butadiene; diphenylamidoborane-bis-ii’-(3-isopropylinden-1-yl)zirconiumTi'*-2,4-hexadiene; diphenylamidoborane-bis-'n’-(3-isopropylinden-1 -yl)zirconium •n'‘-1,4-d(naphthyl-1,3-butadiene; diphenylamidoborane-bis-Ti’-(3-isopropylinden-1 -yl)zirconium TI"*-! -phenyi-1,3-pentadiene; diphenylamidoborane-bis-Ti’-(3-isopropylinden-1 -yl)zirconium TI'‘-I ,3-pentadiene; diphenylamidoborane-bis-Ti’-(3-t-bu.tytinden-1-yl)zirconiumdichloride; diphenylamidoborane-bis-Ti’-(3-t-butylinden-1-yl)zirconium dimethyl; diphenylamidoborane-bis-Ti’-(3-t-butylinden-1-yl)zirconium bis-dlmethylamide; diphenylamidoborane-bis-'n’-(3-t-butylinden-1 -yl)zirconium 2-methyl-1,3-butadiene; diphenylamidoborane-bis-n’-(3-t-butylinden-1 -yl)zirconium 2,3-dimethyl-1,3-butadiene; diphenylamidoborane-bis-Ti’-(3-t-butylinden-1-yl)zirconium2-N,N-dimethylaminobenzyl; diphenylamidoborane-bis-Ti’-{3-t-butylinden-1-yl)2irconiumallyl; diphenylamidoborane-bis-T|’-(3-t-butylinden-1 -yl)zirconium ri'‘-l ,4-diphenyl-1,3-butadiene; diphenylamidoborane-bis-'n’-(3-t-butylinden-1-yl)zirconium V-2.4-hexadiene; diphenylamidoborane-bis-Ti’-(3-t-butylinden-1 -yl)zirconium TI'*-1 ,4-dinaphthyl-1,3-butadiene; diphenylamidoborane-bis-Ti’-(3-t-butyrmden-1 -yl)zirconium TI’-1 -phenyl-1,3-pentadiene; diphenylamidoborane-bis-Ti’-(3-t-butylinden-1 -yl)zirconium TI'‘-I ,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-ii’-cyclopentadienylzirconiumdichloride; bis(trimethylsilyl)amidoborane-bis-Ti’-cyclopentadienylzirconium dimethyl; bis(trimethylsilyl)amidoborane-bis-T]’-cyclopentadienylzirconiumbis-dimethyiamide; bis(trimethylsilyl)amidoborane-bis-T’’-cyclopentadienylzirconium2-methyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-cyclopentadienylzirconium2,3-dimethyl-1.3-butadiene; bis(trimethylsilyl)amidoborane-bis-T|’-cyclopentadienyizirconium2"N,N-dimethylaminobenzyl; bisCtrimethylsilyOamidoborane-bis-n’-cyclopentadienyizirconium allyl; bis(trimethylsilyl)amidoborane-bis-Ti’-cyclopentadienylzirconium TI'*-1,4-diphenyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-cyclopentadienylzirconiumTi'*-2,4-hexadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-cyclopentadienylzirconiumr|’-1,4-dinaphthyl"1,3-butadiene; bis(trimethylsiiyl)amidoborane-bis-ti’-cyclopentadienylzirconiumV-1-phenyl-1,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-n’-cyclopentadienylzirconiumTi’-1,3-pentadiene; bis(trimethylsilyl)amidoborane-bis r’’-inden-l -ylzirconium dichloride; bis(trimethylsilyl)amidoborane-bis-Ti’-inden-1-ylzirconium dimethyl; bis(trimethylsilyl)amidoborane-bls-ii’-inden-1-ylzirconiumbis-dimethylamide; bis(trimethylsilyl)amidoborane-bis-Ti’-inden-1 -ylzirconium 2-methyl-1,3-butadiene; bisOrimethylsilyOamidoborane-bis-Ti’-inden-l -ylzirconium 2,3-dimethyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-ti’-inden-1 -ylzirconium 2-N,N-dimethylaminobenzyl; bis(trimethylsilyl)amrdoborane-bis-Ti’-inden-1-ylzirconium allyl; bis(trimethylsilyl)amidoborane-bis-Ti’-inden-1 -ylzirconium ri’-1,4-diphenyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-inden-1-ylzirconium V-2,4-hexadiene; bls(trimethylsilyl)amidoborane-bis-Ti’-inden-1 -ylzirconium TI’-1 .4-dinaphthyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-inden-1 -ylzirconium TI'‘-I -phenyl-1,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-inden-1 -ylzirconium V-1,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methylinden-1-yl)zirconiumdichloride; bis(tiimethylsilyi)amidoborane-bis-Ti’-(2-methylinden-1-yl)zirconium dimethyl; bis(trimethylsilyi)amidoborane-bis-Ti’-(2-methylinden-1-yl)2irconiumbte’ dimethylamide; bis(trimethylsilyl)amidoborane-bis-T|’-(2-methyiinden-1-yl)2irconium2-methyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-'n’-(2-methylinden-1-yl)zirconium2,3-dimethyl-1.3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methylinden-1-yl)zirconium2-N,N-dimethylaminobenzyl; bis(trimethylsiiyl)amidoborane-bis-Ti’-(2-methylinden-1-yl)zirconiumallyl; bis(trimethylsilyi)amidoborane-bis-n’-{2-methylinden-1 -yl)zirconium ri'*-! ,4-diphenyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-ti’-(2-methylinden"1-yl)zirconiumTi'*-2,4-hexadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-{2-methylinden-1 -yl)2irconium TI’-1 ,4-dinaphthyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(2"methylinden-1 -yl)zirconium V-1 -phenyl-1,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-'n’-{2-methylinden-1 -yl)2irconiiim V-1,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-{2-methyl-4-phenylinden-1-yl)2irconium dichloride; bis(trimethylsiiyl)amidoborane-bis-'n’-(2-methyl-4-phenyiinden-1-yl)zirconium dimethyl; bis(trimethylsilyl)amidoborane-bis-n’-(2-metfiyl-4-phenylinden-1-yl)zirconium bis-dimethylamide; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-phenylinden-1-yl)zirconium 2-methyl-1,3-butadiene; bis(trimethyisiiyl)amidoborane-bis-T]’-(2-methyl-4-phenylinden-1-yl)2irconium 2,3-dimethyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-mettiyl-4-phenylinden-1-yl)2irconium 2-N,N-dimethylaminobenzyi; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-phenylinden-1-yl)zirconium allyl; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-phenylinden-1-yl)zirconium Ti’-1,4-diphenyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-phenylinden-1-yl)zirconi Tl'‘-2,4-hexadiene; bis(trimethylsilyl)amidoborane-bis-'n’-(2-rnethyl-4-phenylinden-1-yl)zirconium Ti'*-! .4-dinaphthyl-1,3-butadiene; bis(trimethytsilyl)amidoborane-bis-Ti’-(2-methyl-4-phenylinden-1-yl)zirconiurn Ti’-1 -phenyl-1,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-{2-rnethyl-4-phenylinden-1-yl)zirconium V-1,3-pentadiene; bis(trimethyisilyl)amidoborane-bis-T|’-(2-rnethyl-4-naphthylinden-1-yl)zirconium dichloride; bis(trimethylsilyl)amidoborane-bis-ri’-(2-rnethyl-4-naphthylinden-1-yl)zirconium dimetnyl; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)zirconiurn bis-dimethylamide; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)zirconlum 2-methyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)zirconium 2,3-dimethyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yi)zirconium 2-N,N-dimethylaminobenzyl; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)zirconium allyl; bis(tiimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)zirconium V-1,4-diphenyl-1,3-butadiene; bis{trimethylsilyl)amidoborane-bis-Ti’-{2-methyl-4-naphthylinden-1-yl)zirconium r|’-2.4-hexadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)zirconium V-1,4-dinaphthyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)2irc’ r]’-1 -phenyl'1,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-r|’-(2-methyl-4-naphthylinden-1-yl)2irconium r|’-1,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(3-isopropylinden-1-yl)2irconium dichloride; bis(trimethylsilyl)amidoborane-bis-Ti’-{3-isopropylinden-1"yl)2irconium dimethyl; bis(trimethylstlyl)amidoborane-bis-r|’-(3-isopropylinden-1-yl)2irconium bis-dimethylamide; bis(trimethylsiiyl)amidoborane-bis-Ti’-(3-tsopropylinden-1-yl)zirconium2-methyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(3-isopropylinden-1-yl)zirconium2,3-dimethyl-1.3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(3-isopropylinden-1-yl)2irconium2-N,’’ dimethylaminoben2yl; bis(trimethylsilyl)amidoborane-bis-Ti’-(3-isopropylinden-1-yl)2irconiumallyl; bis(trimethylsilyl)amidoborane-b(s-Ti’-(3'isopropylind€n-1 -yl)2irconium V-1,4-diphenyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-ri’-(3-isopropylinden"1-yi)zirconiumV-2,4- hexadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(3-isopropylinden-1 -yl)2irconium TI'‘-I ,4- dinaphthyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(3-isopropylinden-1 -yOzirconium TI'‘-I - phenyl-1,3-pentadiene; bis(trin’ethylsilyl)amidoborane-bis-Ti’-(3-isopropylinden-1 -yl)zirconium TI'*-1 ,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(3-t-butylinden-1-yl)2irconiunri dichloride; bis(trimethyisilyl)amidoborane-bis-n’-(3-t-butylinden-1-yl)zirconium dimethyl; bis(trimethylsilyl)amidoborane-bis-Ti’-(3-t-butylinden-1-yl)2irconiumbis-dimethylamide; bis(trimethylsilyl)amidoborane-bis-Ti’-(3"t-butylinden-1-yl)zirconium2-me’’ 1.3-butadiene; bts(trimethylsiiyl)amidoborane-biS"n’-(3"t-butylinden-1-yl)zirconium dimethyl-1,3-butadiene; bls(trimethylsilyl)amidoborane-bisV-(3-t-butylinden-1-yl)2irconium2-N,N-dimethylaminobenzyl; bis(trimethy!silyl)amidoborane-bis-'n’-(3-t-butylinden-1-yi)zirconiumallyl; bis(trimethylsilyl)amidoborane-bis-Ti’-(3-t'butyiinden-1 -yl)zirconium TI’-1 ,4-diphenyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(3-t-butylinden-1-yl)zirconiumTi'‘-2.4-hexadiene; bis(trimethylsilyl)amidoborane-bis-ri’-(3-t-butylinden-1 -yl)zirconium V-1,4-dinaphthyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(3-t-butylinden-1-yl)zirconium Ti'‘-I-phenyl-1,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-r|’"{3-t-butylinden-1 -yl)zirconium V-1,3-pentadiene; bis(diisopropylamido)diborane-1,2-bis-Ti’-(2-methyl-4-phenylinden-1-yl)zirconium dichloride; bis(diisopropylamido)diborane-1,2-bis-ti’-(2-methyl-4-phenylinden-1-yl)zirconium dimethyl; bis(diisopropylamido)diborane-1,2-bis-Ti’-(2-methyl-4-phenylinden-1-yOzirconium bis-dimethyiamide; bis(diisopropylamido)diborane-1,2-bis-Ti’-(2-methyl-4-phenylinden-1-yi)2irconium 2-methyl-1,3-butadiene; bis(diisopropylamido)diborane-1,2-bis-n’-(2-methyl-4-phenylinden-1- yl)zirconium 2,3-dimethyl-1,3-butadiene; bis(diisopropylamido)diborane-1,2-bis-Ti’-{2-methyl-4-phenylinden-1- yl)zirconium2-N,N-dimethylaminobenzyl; bis(diisopropylamido)diborane-1,2-bis-n’-(2-methyl-4-phenylinden-1- yl)2irconium allyl; bis(diisopropylamido)diborane-1,2-bis-Ti’-(2-methyl-4-phenyiinden-1- yl)zirconium V-l ,4-diphenyl-1,3-butadiene; Dis(diisopropyiamido)dibofane-1,2-bis-Ti’-(2-methyl-4-phenylinden-1-yl)2irconium Ti’-2.4-hexadiene; bis(diisoprDpylamido)diborane-1,2-bis-Ti’-(2'methyl-4-phenyllnden-1-yl)zirconium ri’-1,4-dinaphthyl-1,3-butadiene; bis(diisopropylamido)diborane-1,2-bis-T]’-(2'methyl-4-phenylinden-1-yl)2irconiumTi'‘-1"phenyl-1,3-pentadiene; bis(diisopropylamido)diborane-1,2"bis-ri’-(2-methyl-4-phenylinden-1-yl)2irconium Ti’-1,3-pentadiene; dimethylamidoborane-bis-T|’-cyclopentadienyl hafnium dichloride; dimethylamidoborane-bis-Ti’-cyclopentadienyl hafnium dimethyl; dimethylamidoborane-bis-Ti’-cyclopentadienyl hafnium bis-dimethylamide; dimethylamidoborane-bis-Ti’-cyclopentadienyl hafnium 2-methyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-cyclopentadienyl hafnium 2.3-dimethyl-1,3-butadiene; dimethyiamidoborane-bis-r|’-cyclopentadienyl hafnium 2-N,N-dimethylaminobenzyl; dimethylamidoborane-bis-ii’-cyclopentadienyl hafnium allyl; dimethyiamidoborane-bis-Ti’-cyclopentadienyl hafnium -q’-l ,4-diphenyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-cyclopentadienyJ hafnium Ti’-2,4-hexadiene; dimethylamidoborane-bis-Ti’-cyclopentadienyl hafnium TI’-1 ,4-dinaphthyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-cyclopentadienyl hafnium ri'*-1-phenyl-1,3-pentadiene; dimethylamidoborane-bis-Ti’-cyciopentadienyl hafnium r|’-1,3-pentadiene; dimethylamidoborane-bis-Ti’-n-butylcyclopentadienyl hafnium dichloride; dimethylamldoborane-bis-Ti’-n-butylcydopentadienyl hafnium dimethyl; dimethylamidoborane-bis-Ti’-n-butylcyclopentadienyl hafnium bis-dimethylamide; dimethylamidoborane-bis-Ti’-n-butylcyclopentadienyl hafnium 2-methyl-1,3-butadiene; dimethylamidoborane"bis-Ti'-n-butylcyclopentadienyl hafnium 2,3-dimethyl-1,3-butadiene,' dimethylamidoborane-bis-Ti’-n-butylcyciopentadienyl hafnium 2-N.N-dimethylaminobenzyl; dimethylamidoborane-bis-'n’-n-butytcyclopentadienyl hafnium allyl; dimethylamidoborane-bis-Ti’-n-butylcyclopentadienyl hafnium -q'‘-l ,4-diphenyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-n-butylcyclopentadienyl hafnium Ti’-2,4-hexadiene; dimethylamidoborane-bis-Ti’-n-buty(cyc!opentadienyi hafnium ri'*-1,4-dinaphthyl-1,3-butadiene; dimethylamidoborane-bis-ri’-n-butylcyciopentadienyl hafnium ri’-l-phenyl-1,3-pentadiene; dimethylamidoborane-bis-Ti’-n-butylcyclopentadienyl hafnium TI’-1,3-pentadiene; nden-1-ylhafnium dichloride; nden-1-ylhafnium dimethyl; nden-1 -ylhafnium bis-dimethylamide; nden-1 -ylhafnium 2-methyl-1,3-butadiene; nden-1 -ylhafnium 2,3-dimethyl-1.3-butadiene; nden-1 -ylhafnium 2-N,N-dimethylaminobenzyi; nden-1-ylhafnium allyl; nden-1-ylhafnium TI'*-1 .4-diphenyl-1,3-butadiene; nden-1 -ylhafnium Ti'*-2,4-hexadiene; nden-1-ylhafnium TI'‘-I ,4-dinaphthyl-1,3- dimethylamidoborane-bis-Ti -dimethylamidoborane-bis-ii’-dimethylamidoborane-bis-Ti’-dimethylamidoborane-bis-Ti’-dimethylamidoborane-bis-T|’-dimethylamidoborane-bis-T|’-dimethylamidoborane-bis-Ti’-dimethylamidoborane-bis-11’-dimethylamidoborane-bis-ti’-dimethylamidoborane-bis-'n’-butadiene; dimethylamidoborane-bis-Ti’-inden-1 -ylhafnium V-’ -phenyl-1,3-pentadiene; dimethylamidoborane-bis-n’-inden-1 -ylhafnium r\’'i ,3-pentadiene; dimethylamidoborane-bis-'n’-(2-methylinden-1-yl)hafnium dichloride; dlmethylamidoborane-bis-Ti’-(2-methylinden-1 -yl)hafnium dimethyl; dlmethylamidoborane-bis-Ti’-(2-methylinden-1-yl)hafnium bis-dimethylamide; dimethylamidoborane-bis-'n’-(2-methylinden-1 -yi)hafnium 2-methyl-1,3-butadiene; dimethylamidoborane-bis-ti’-{2-methylinden-1 -yl)hafnium 2,3-dimethyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-{2-methylinden-1 -yl)hafnium 2-N,N-dimethylaminobenzyl; dtmethylamidoborane-bis-Ti’-(2-methylinden-1 -yl)hafnium allyl; dimethylamidoborane-bis-n’-(2-methylinden-1 -yl)hafnium TI'‘-I ,4-diphenyl-l ,3-butadiene; dimethylamidoborane-bis-Ti’"(2-methylinden-1-yl)hafniumTi’-2,4-hexadiene; dimethylamidoborane-bisV-(2"methyl!nden-1 -yl)hafnium V-1,4-dinaphthyl-1,3-butadiene; dimethylamidoborane-biS"ti’-(2-methylinden-1 -yl)hafnium ■n'*-1 -phenyl-1,3-pentadiene; dimethylamidoborane-bis-Ti’-(2-methylinden-1 -yl)hafnium ‘-1,3-pentadiene; dimethylamidoborane-bis-Ti’-{2-methyl-4-phenv iinden-1 -yl)hafnium dichloride; dimethylamidoborane-bis-ti’-(2-methyl-4-phenylinden-1-yl)hafnium dimethyl’ dimethylamidoborane-bis-Ti’-(2-methyl-4-phenylinden-1-yI)hafniurnbis-dimethylamide; dinriethyiamidoborane-bis-r|’-(2-methyl-4-phenylinden-1-yl)hafnium2"methyl- 1,3-butadiene; dimethyl)amidoborane-bis-Ti’-(2-methyl-4-phenylinden-1-yl)hafnium2,3-dimethyl-1,3-butadiene; dirnethytamidoborane-bis-ti’-(2-methyl-4-phenylinden-1-yl)hafnium2-N,N-dimethylaminobenzyl; dimethylamidoborane-bis-'n’-(2-methyl-4-phenylinden-1-yl}hafnium allyl; dimethylamidoborane-bis-n’-(2-mettnyl-4-phenylinden-1 -yl)hafnium r{‘-i ,4- diphenyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-(2-methyl-4-phenylinden-1--yl)hafnium V"2,4- hexadiene; dimethylamidoborane-bis-'n’-(2-methyl-4-plienylinden-1 •yl) r\’'•’ ,4- dinaphthyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-(2-methyl-4-phenylinden-1 -yl)hafnrum TI’’-I -phenyl-1,3-pentadiene; dimethyiamidoborane-bis-Ti’-(2-methyl-4-phenylinden-1 -yl)hafnium ri'*-1,3-pentadiene; dimethylamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)hafnium dichloride; dimethylamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)hafnium dimethyl; dimethylamidoborane-bis-n’-(2-methyl-4-naphthylinden-1-yl)hafniumbis-dimethylamide; dimethylamidoborane-bis-r|’-(2-methyl-4-naphthylinden-1-yl)hafnium 2-methyl-1.3-butadiene; dimethylamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)hafnium2,3-dimethyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-{2-methyl-4-naphthylinden-1-yl)hafnium2-N,N-dimethylaminobenzyl; dimethylamidoborane-bis-ri’-(2-metfiyl-4-naphthylinden-1-yl)hafniumallyl; dimethylamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1 -yl)hafnium ‘‘'‘ ,4-diphenyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)hafniumTi'*-2,4-hexadiene; dimethylamidoborane-bis-'n’-(2-methyl-4-naphthylinden-1 -yl)hafnium T’’-I ,4-dinaphthyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1 -yl)hafnium r\’'1 -phenyl-1,3-pentadiene; dimethylamidoborane-bis-'n’-(2-methyl-4-naphthylinden-1 -yl)hafnium TI'‘-I ,3-pentadiene; dimethylamidoborane-bis-n’-(3-isopropylinden-1-yl)hafnium dichloride; dimethylamidoborane-bis-ti’-(3-isopropylinden-1-yl)hafnium dimethyl; dimethylamidoborane-bis-Ti’-CS-isopropyiinden-l -yl)hafnium bis-dimethylamide; dimethylamidoborane-bis-n’-(3-isopropylinden-1 -yl)hafnium 2-methyl-1,3-butadiene; aimethylamidoborane-bis-Ti'-(3-isopropylinden-1 -yl)hafnium 2.3-dimethyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-(3-isopropylinden-1-yl)hafnium2-N,N-dimethylaminobenzyl; dimethylamidoborane-bis-r|’-(3-isopropylinden-1-yl)hafnium allyl; dimethylamidoborane-bis-r|’-(3-isopropylinden-1 -yl)hafnium ri'*-1,4-diphenyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-(3-isopropylinden-1-yl)hafniumTi’"2,4-hexadiene; dimethylamidoborane-bis-'n’-(3-isopropylinden-1 -yl)hafnium r\’'‘ .4-dinaphthyl-1,3-butadiene; drmethylamidoborane"bis-Ti’-{3-isopropylinden-1 -yl)hafnium TI"*-! -phenyl-1,3-pentadiene; dimethyiamidoborane-bis-Ti’-(3-isopropylinden-1 -yl)hafnium tj'‘-l ,3-pentadiene; dimethylaniidoborane-bis-ti’-(3-t-butylinden-1-yl)hafniumdichloride; dimethylarpidoborane-bis-'n’-(3-t-butylinden-1 -yl)have onium dimethyl; dimethylamidoborane-bis-Ti’-(3-t-butylinden-1-yl)hafniumbis-dimethylamide; dimethylamidoborane-bis-r|’-(3-t-butylinden-1 -yl)hafnium 2-methyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-(3-t-butylinden-1 -yl)hafnium 2,3-dimethyl-l ,3-butadiene; dimethylamidoborane-bis-'n’-(3"t-butylinden-1 -yl)hafnium 2-N,N-dimethylaminobenzyl; dimethylamidoborane-bis-7i’-(3-t-butylinden-1 -yl)hafnium allyl; dimethylamidoborane-bisV"(3-t-butylinden-1-yl)hatnium TI"*-! ,4-diphenyl-l ,3-butadiene; dimethylanriidoborane-bis-Ti’-(3-t-butylinden-1-yl)hafnium V-2,4-hexadiene; dimethylamidoborane-bis-Ti’-(3-t-butylinden-1 -yl)hafnium ’-l ,4-dinaphthyl-1,3-butadiene; dimethylamidoborane-bis-Ti’-CS-t-butylinden-l -yl)hafnium ti'‘-l -phenyl-1,3-pentadiene; dimethylamidoborane-bis-Ti’-(3-t-butylinden-1 -yl)hafnium ii’-1,3-pentadiene; diisopropylamidoborane-bis-ii’"Cyclopentadienylhafniumdichloride; diisopropylamidoborane-bis-T|’-cyclopentadienylhafnium dimethyl; diisopropylamidoborane-bis-Ti’-cyclopentadienylhafnium bis-dimethylamide; diisopropylamidoborane-bis-Ti’-cyclopentadienylhafnium2-methyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-cyclopentadienylhafnium 2,3-dimethyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-cyclopentadienylhafnium 2-N,N-dimethylaminobenzyl; diisopropylamidoborane-bis-'n’-cyclopentadienylhafnium allyl; diisopropylamidoborane-bis-Ti’-cyclopentadienylhafnium V-1,4-diphenyl-1,3-butadiene; diisopropyiamrdoborane-bis-Ti’-cyclopentadienylhafnium Ti'*-2,4-hexadiene; diisopropylamidoborane-bis-ti’-cyclopentadienylhafnium V-1,4-dinaphthyl" 1,3-butadiene; diisopropylamidoborane-bis-Ti’-cyclopentadienylhafnium T’’’-I -phenyl-1,3-pentadiene; diisopropylamidoborane-bis-Ti’-cyclopentadienylhafniumTi’-1,3-pentadiene; diisopropylamidoborane-bis-T|’-inden-1 -ylhafnium dichloride; diisopropylamidoborane-bis-t’’-inden-1 -ylhafnium dimethyl; diisopropylamidoborane-bis-Ti’-inden-1-ylhafnium bis-dimethylamide; diisopropylamidoborane-bis-ti’-inden-1 -ylhafnium 2-methyl-1,3-butadiene; diisopropylamidoborane-bis-n’-inden-1 -ylhafnium 2,3-dimethyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-inden-1-ylhafnium2-N,N-dimethylaminobenzyl; diisopropytamidoborane-bis-Ti’-inden-1 -ylhafnium allyl; diisopropylamidoborane-bis-n’-inden-l -ylhafnium -q'‘-l ,4-diphenyl-1,3-butadiene; diisopropylamidoborane-bis-r|’-inden-1 -ylhafnium V-2,4-hexadJene; diisopropylamidoborane-bis-Ti’-inden-1 -ylhafnium V-1,4-dinaphthyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-inden-1 -ylhafnium V-1 -phenyl-1,3-pentadiene; diisopropylamidoborane-bis-Ti’-inden-1 -ylhafnium TI*-1 ,3-pentadiene; diisopfopylamidoborane-bis-Ti’-{2-methylinden-1-yl)hafniurndich(oride; diisoprapylarnidoborane-bis-Ti’-(2-methylinden-1-yl)hafnium dimethyl; diisopropylamidobOfHne-bis-'n’-(2-methylinden-1 -yl)hafnium bis-dimethyiamide; diisopropylamidoborane-bis-T\’-(2-methylinden-1 -yl)hafnium 2-methyl-1,3-butadiene; diisopropylamidoborane'bis-T|’-{2-methylinden-1 -yl)hafnium 2,3-dimethyl-1,3-butadiene; diisopropylamidoborane"bis-Ti’-(2-niethylinden-1-yl)hafnium2-N»N-dimethytaminobenzyl; diisopropylamidoborane"bis-n’-(2-methylinden-1-yl)hatniumallyl; diisopropylamidoborane*bis-n’-(2-methyiinden-1 -yl)hafnium V-1,4-diphenyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-(2-methylinden-1-yl)hafniurn V-2,4-hexadiene; diisopropylamidoborane-bis-Ti’-(2-methylinden-1 -yl)hafnium TJ’-I ,4-dinaphthyl-1 »3"butadiene; diisopropylamidoborane-bis-Ti’-(2-methylinden-1 -yl)hafnium n’-l -phenyl-1,3-pentadiene; diisopropylamidoborane-bis-r|’-(2-methyiinden-1 -yl}hafnlum -n’-l ,3-pentadiene; diisopropylamidoborane-bis-n’-{2-methyl-4-phenylinden-1-yl)hafnium dichloride; diisopropylamidoborane-bis-ii’-(2-methyM-phenylinden-1-yi)hafnlum dimethyl; diisopropylamidoborane-bis-ii’-(2-methyl-4-phenylinden'1-yl)hafniumbis-dimethylamide; diisoprDpylamidoborane-bis-7i’"(2-methyl-4-phenylinden-1-yl)hafnium2-methyl-1,3-butadiene; dicsopfopylamcdoborane-bis-Ti’-(2-methyl-4-phenylinden-1-yl)hafnium2,3- dimethyl-1,3-butadiene; diisopropyiamidoborane-bis-Ti’-(2-methyl-4-phenylinden-1-yl)hafnium2-N,N- dimethylaminobenzyl; diisopropylamidoborane-best|’"(2-methyl-4-phenylinden-1-yl)hafniumaIlyl; diisopropylamidoborane-bis-'n’-(2"methyl-4-phenyiinden-1 -yl)hafnium TI'*-1 A-diphenyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-(2-methyl-4-phenyiinden-1-yl)hafnium 71’-2,4" hexadiene; diisopropylamidoborane-bis-'n’-{2-methyl-4-phenylinden-1 -yt)hafnium rf-1,4-dinaphthyl-1,3-butadiene; diisopropylamidoborane-bis-ri’-(2-methyl-4-phenylinden-1 -yl)hafnium V-1 -phenyl-1,3-pentadiene; diisopropyiamidoborane-biS"r|’-{2-methyl-4-phenylinden-1 -yl)hafnium T\'*-1 ,3-pentadiene; diisopropylamidoborane-bis-ii’-(2-methyl-4-naphthylinden"1-yl)hafnium dichloride; diisopropylamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yi)hafnium dimethyl; diisopropylamidoborane-bis-Ti’-(2-methyl-4-naphthyllnden-1-yl)hafniumbis-dimethylam diisopropylamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)hafnium2-methyl-1.3-butadiene; dilsopropylamidoborane-bis-Ti’-(2-methyM-naphthylinden-1-yl)hafnium2,3-dimethyl-1,3-butadiene; diisopropylamidoborane-bis-n’-(2-methyl-4-naphtliylinden-1-yl)hafnium2-N,N-dimethylaminobenzyl; diisopropylamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)hafniumallyl; diisopropylamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1 -yl)hafnium r|’-1,4-diphenyl-1,3-butadiene; diisopropylamidoborane-bis-'n’-(2-niethyl-4-naphthylinden-1-yl)hafniumTi’-2,4-hexadiene; diisopropylamldoborane-bis-Ti’-(2-methyl-4-naphthyrmden-1 -yl)hafnium TI'‘-I ,4- dinaphthyl-1,3-butadiene; diisopropylamidoborane-bis-ti’-(2-metliyl-4-naphthylinden-1 -yl)hafnium V-1 - phenyl-1,3-pentadiene; diisopropylamidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1 -yl) diisopropylamidoborane-bis-Ti’-{3-isopropyrmden-1-yl)hafniumdichloride; diisopropyiamidoborane-bis-Ti’-(3-isopropylinden-1-yl)hafnium dimethyl; diisopropylamidoborane-bis-r|’-(3"isopropylinden-1-yl)hafniumbis* dimethylamide; diisopropylamidoborane-bis-'n’-(3-isopropylinden-1 -yl)hafnium 2-methyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-(3-isopropylinden-1-yl)hafnium2,3-dimethyl-1,3-butadiene; diisopropylamidoborane-bis-Ti’-(3HSopropylinden-1-yl)hafnium2-N,N-dimethytaminobenzyl; ditsopropylamidoborane-bis-Ti’-(3-isopropylinden-1-yl)hafniumallyl; diisopropylamidoborane-bis-'n’-(3-isopropylinden-1 -yl)hafnium V""! A-diphenyl-1,3-butadiene; diisopropyiamidoborane-bis-n’-(3-isopropylinden-1-yl)hafniumTi'*-'2,4" hexadiene; diisopropytamidoborane-biS"T|’-(3-isopropylinden-1 -yl)hafnium V-1,4-dinaphthyl-1,3-butadiene; diisopropyiamidoborane-bis-Ti’-(3-isopropylinden-1 -yl)hafnium TI"*-! -phenyl-1,3-pentadiene; diisopropylamidoborane-bis-n’-CS-isopropylinden-l -yl)hafnium V-1,3-pentadiene; diisopropylamidoborane-bis-r|’-{3-t-butylinden-1-yl)hafniumdichloride; diisopropyiamidoborane-bisV-{3-t-butyJinden-1-yl)hafnium dimethyl; diisopropylamidoborane-bis-Ti’-{3-t-butylinden-1 -yl)have nium bis- dimethylamide; diisopropylamidoborane-bis-n’-’S-t-butylinden-l -yl)hafnium 2-methyi-1,3-butadiene; diisopropyiamidoborane-bis-Ti’-{3-t-butylinden-1 -yl)hafnium 2,3-dimethyl-1,3-butadiene; diisopropylamidoborane-bis-n’-(3-t-butylinden-1-yl)hafnium 2-N,N- dimethylaminobenzyl; diisopropylamidoborane-bis-Ti’-(3-t-butylinden-1 -yi)hafnium allyl; diisopropylamidoborane-bis-Ti’-(3-t-butylinden-1 -yl)hafnium r\’'1.4-diphenyl-1.3-butadiene; diisopropylamidoborane4)is-T|’-(3-t-butylinden-1-yl)hafniumri'*-2,4-hexadiene; diisopropylamidoborane-bis-ri’-(3-t-butylinden-1 -yl)hafnium r|’-1,4-dinaphthyl-1,3-butadiene; diisopropylamidoborane"bis-r|’-{3-t-butylinden-1 -yl)hafnium ry’-l-phenyl-1,3-pentadiene; diisopropylamidoborane-bis-Ti’-(3-t-butylinden-1 -yl)hafnium rj'‘-l ,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-cyclopentadienylhafniumdichloride; bis(trimethylsilyl)amidoborane-bis-Ti’-cyclopentadienylhafnium dimethyl; bis(trimethylsilyl)amidoborane-bis-n’-cyclopentadienylhafniumbis-dimethylamide; bis(trimethylsilyl)amidoborane-bis-'n’-q’clopentadienylhafnium2-methyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-ti’-cyclopentadienylhafnium2,3-dimethyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-ii’-cyclopentadienylhafnium2-N,N-dimethylaminobenzyl; bis(trimethylsilyl)amidoborane-bis-ti’-cyclopentadienylhafnium allyl; bis(trimethylsilyl)amidoborane-bis-'n’-cyclopentadienylhafniumTi'*-1,4-diphenyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-cyclopentadienylhafniumti'*-2,4-hexadiene; bis{trimethylsilyl)amidoborane-bis-Ti’-cyclopentadienyihafniumti'‘-1,4- dinaphthyl-1,3-butadiene; * bis(trimethylsilyl)amidoborane-bis-Ti’-cyclopentadienylhafniumT]'*-1-phenyl-1,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-cyclopentadienyihafniumTi’"1,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-inden-1-ylhafniumdichloride; bis(trimethylsilyl)amidoborane-bis-'n’-inden-1 -ylhafnium dimethyl; bis(trimethylsilyl)amidoborane-bis-Ti’-inden-1-ylhafniumbis-dimethylamide; bis(trimethylSilyl)amidoborane-bis-Ti’-inden-1 -ylhafnium 2-’ethyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-inden-1 -ylhafnium 2,3-dimethyi-1,3-butadiene; bis(tr1methylsilyl)amidoborane-bis-n’-inden-1 -ylhafnium 2-N,N-dimethylaminobenzyl; bis(trimethylsilyl)amidoborane-bis-ri’-inden-1 -ylhafnium allyl; bis(trimethylsilyl)amidoborane-bis-r|’-inden-1-ylhafnium rf-1,4-diphenyl-1,3-butadiene; bts(trimethylsilyl)amidoborane-bis-Ti’-inden-1-ylhafnium V-2,4-hexadiene; bis(trimethylsilyl)amidoborane-bis-'n’-inden-1-ylhafnium Vi’-’ ,4-dinaphthyl-1,3-butadiene; bis(trimethylsilyt)amidoborane-bis-Ti’-inden-1-ylhafnium vi’-l -phenyl-1,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-inden-1 -ylhafnium TI'-1 ,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methylinden-1-yl)hafniumdichloride; bis(trimethylsilyi)amidoborane-bis-Ti’-(2-methyllnden-1-yl)hafnium dimethyl; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methylinden-1-yl)hafniumbis-dimethyiamide; bis(trimethylsiiyl)amidoborane-bis-'n’-(2-methylinden-1-yl)hafnium2-methyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyiinden-1-yl)hafnium2,3-dimethyl-1,3-butadiene; bis{trimethylsilyl)amidoborane-bis-Ti’-(2-methylinden-1-yl)hafnium2-N,N-dimethyiaminobenzyl; bis(trimethylsilyl)amidoborane-bis-ii’-(2-methylinden-1-yl)hafnium allyl; bis(trimethylsilyl)amidoborane-bis-ti’-(2-methylinden-1 -yl)hafnium ri'‘-l .4-diphenyl-1,3-butadiene; bls(trimethylsilyl)amidoborane-bis-T|’-(2-methylinden-1-yl)hafnium V-2.4- hexadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methylinden-1 -yl)hafnium TI'*-1 A- dinaphthyi-1,3-butadiene; bis(trimethylsllyl)amidoborane-bis-Ti’-(2-methylinden-1-yl)hafnium'n'‘"1-phenyl-1,3-pentadiene; bis(trimethyisilyl)amidoborane-bis-n’-{2-methytinden-1 -yl)hafnium -q"*-! ,3-pentadiene; bis(trimethyisilyl)amidoborane-bis-Ti’-(2-methyl-4-phenylinden-1-yl)hafnium dichloride; bis(trimethylsilyl)amidoborane-bis-'n’-{2-methyl-4-phenylinden-1-yl)hafnium dimethyl; bis(triniethylsilyl)amidoborane-bis-r|’-(2-methyl-4-phenylinden-1-yl)hafnium bis-dimethylamide; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-phenylinden-1--yl)hafniunr)2-methyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-phenylinden-1-yl)hafnium 2,3"dimethyM ,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4"phenylinden-1-yl)hafnium2-N,N-dimethylaminobenzyl; bis(trimethylsilyl)arnidoborane-bis-Ti’-(2-methyl-4"phenylinden-1-yl)hafnium allyl; bis(trimethylsilyl)amidoborane-bis-r|’-(2-methyl-4-pheny linden-1-yl)hafniuniTi’-1.4-diphenyl-1,3-butadiene; bis(trimethylsilyi)arnidoborane-bis-Ti’-(2-methyl-4-phenyiinden-1-yi)hafniumTi'*-2,4-hexadiene; bis(triniethylsilyl)amidoborane-bis-r|’-(2-methyl-4-phenylinden-1-yl)hafniunriTi'‘-1,4-dinaphthyl-1,3'butadiene; bis bis(trimethylsilyl)amidoborane-bis-n’-(2-methyl-4-phenyiinden-1-yl)hafniunr’Tl'*-1,3-pentadiene; bis(triniethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)hafnium dichloride; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)hafnium dimethyl; bis(trimethylsilyl)amidoborane-bis-ti’-(2-methyl-4-naphthylinden-1"yl)hafnium bis-dimethylamide; bis(trimethylsilyl)amidoborane-bis-'n’-(2-methyl-4-naphthylinden-1"yl)hafnium 2-methyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-{2-methyl-4-naphthylinden-1-yl)hafnium 2,3-dimethyl-1,3-butadiene; bis(trimethytsilyl)amidoborane-bis-Ti’-(2-rnethyl-4-naphthylinden-1-yl)hafnium 2-N,N-dimethylaminoben2yt; bis(trimethylsilyl)amidoborane-bis-r|’-(2-methyl-4-naphthylinden-1-yl)hafnium atlyl; bis(trimethylsilyl)amidoborane-bis-'n’-(2-methyl-4"naphthylinden-1-yl)hafnium r[‘-1,4-diphenyl-1,3-butadiene; bis{trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)hafniurn Ti'*-2.4-hexadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)hafnium Ti’-1.4-dlnaphthyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(2-methyl-4-naphthyHnden-1-yl)hafnium Tl’-1 -phenyl-1.3-pentadJene; bis(trimethylsilyl)amidoborane-bisV-(2-methyl-4-naphthyiinden-1-yl)hafnium r\’-’ ,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(3-isopropylinden-1-yl)hafnium dichloride; bis(trimethylsilyl)amidoborane-bis--n’-(3-isopropylinden-1-yl)hafnium dimethyl; bis(trimethylsiiyl)amidoborane-bis-'n’-(3-isopropylinden-1-yl)hafnium bis-dimethylamide; bis(trimethylsilyl)amidoborane-bis-'n’-(3-isopropylinden-1-yl)hafnium2-methyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-'n’-(3-isopropyiinden-1-yl)hafnium2,3- dimethyl-1,3-butadiene; bis(trimethylsilyi)amidoborane-bis-Ti’-(3-isopropylinden-1-yl)hatnium2-N,N- dimethyiaminobenzyl; bis(trimethylsilyl)amidoborane-bisV-(3-isopropylinden-1-yl)hafniumallyl; bis(trimethylsilyl)amidoborane-bis-Ti’-(3-isopropylinden-1 -yl)hafnium TI'‘-I ,4-diphenyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-'n’-(3-isopropylinden-1-yl)hafniumT)'*-2,4-hexadiene; bis(trimethylsiiyl)amidoborane-bis-ii’-(3-isopropylinden-1 "yl)hafnium TI'*-1 ,4-dinaphthyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-Ti’-(3-isopropylinden-1 -yl)hafnium TI'‘-I -phenyl-1,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-T|’-(3-isopropylinden-1 -yl)hafnium T’'*-! ,3-pentadiene; bis(trimethylsiiyl)amidoborane-bis-n’-(3-t-butylinden-1-yl)hafniumdichloride; bis(trimethylsilyl)amidoborane-bis-Ti’-(3-t-butylinden-1-yl)hafnium dimethyl; bis{trimethylsilyl)amidoborane-bis-n’-(3-t-butyiinden-1-yl)hafniumbis-dimethylamide; bis(trimethy!silyl)amidoborane-bis-Ti’-(3-t-butylinden-1-yl)hafnium2-methyl-1.3-butadiene; bis(trimethylsilyl)amidoborane"bis-Ti’-(3-t-butyiinden-1-yl)hafnium2,3-dimethyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-n’-(3-t"butylinden-1-yl)hafnium2-N,N-dimethylaminobenzyl; bis(trimethylsilyi)amidoborane-bis-'n’-(3-t-butylinden-1-yl)hafniumallyl; bis(trimethylsilyl)amidoborane-bis-r|’-(3-t-butylinden-1 -yl)hafnium T’’-I ,4-diphenyl-1,3-butadiene; bis(trimethytsilyl)amidoborane-bis-'n’-(3-t-butylinden-1-yl)hafniumT|’-2,4-hexadiene; bis(trimethylsilyi)amidoborane-bis-Ti’-{3-t-butylinden-1 -yl)hafnium TI’-1 ,4-dinaphthyl-1,3-butadiene; bis(trimethylsilyl)amidoborane-bis-T)’-(3-t-butylinden-1 -yl)hafnium TI’’-I -phenyl-1,3-pentadiene; bis(trimethylsilyl)amidoborane-bis-'n’-(3-t-butylinden-1-yl)hafnium V-1'3" pentadiene; bis(diisopropylamido)diborane-1,2-bis-Ti’-(2-methyl-4-phenylinden-1-yl)hafnium dichloride; bis(diisopropylamido)diborane-1,2-bis-'n’-(2-methyl-4-phenylinden-1-yl)hafnium dimethyl; bis(diisopropylamido)diborane-1,2-bis-'n’-(2-methyl-4-phenytinden"1-yl)hafnium bis-dimethylamide; bis(diisoprDpylamido)diborane-1,2-bis-Ti’-(2-methyM-phenylinden-1-yl)hafnium 2-methyl-1,3-butadiene; bis(diisopropylamido)diborane-1,2-bis-Ti’-(2-methyl-4-phenylinden"1-yl)haf nium 2,3-dimethyl-1,3-butadiene; bis(diisopropylamido)diborane-1,2-bis-Ti’-(2-methyl-4-phenylinden-1-yl)hafnium2-N,N-dimethylaminobenzyl; bis(diisopropylamido)diborane-1,2-bis-Ti’-{2-methyl-4-phenyr!nden-1-yl)hafnium allyl; bis(diisopropylamido)diborane-1,2"bis-r|’-(2-methyl-4-phenylinden-1-yl)hafnium ■n'‘-l .4-diphenyl-1,3-butadiene; bis(diisopropylamido)diborane-1,2-biS"ti’-(2-methyl-4-phenylinden-1-yOhafnium r|’-2,4-hexadiene; bis(diisopropylamido)diborane-1,2-bis-Ti’-(2-methyl-4-phenylinden-1-yl)haf nium TI’’-I ,4-dinaphthyl-1,3-butadiene; bis(diisopropylamido)diborane-1,2-bis-n’-(2-methyl-4-phenylinden-1-yl)hafnium V-1 -phenyl-1,3-pentadiene; bis{diisopropylamido)diborane-1,2-bis-Ti’-{2-methyl-4-phenylinden-1-yOzirconium V"1.3-pentadiene; (Ti’-tetramethylcyclopentadienyl)(fe/t-butylamido)ditsopropyiamidoborane titanium dichloride; (Ti’-tetramethylcyclopentadienyl)(tert-butylamido)diisopropylamidoborane titanium dimethyl; (tiMetramethylcyclopentadienyl)(terf-butylamldo)diisopropylamidoborane titanium bis-dimethylamide; (Ti’-tetramethylcyclopentadienyl)(tert-butylamldo)diisopropylamidoborane titanium 2-methyl-1,3-butadiene; {TiMetramethylcyclopentadienyl)(term-butylamido)diisopropyiamidoborane titanium 2,3-dimethyl-1,3-butadiene; (TiMetramethylcyciopentadienyi)(terf-butylamido)diisopropylamidoborane titanium 2-N,N-dimethylaminobenzyl; (TiMetramethylcyclopentadienyl)(terf-butylamido)diisopropylamidoborane titanium ally!; (Ti’-tetramethylcyciopentadienyl)(tear-butylamido)diisopropylamidoborane titanium ‘‘'‘,4-diphenyl-1,3-butadiene; (Ti’-tetramethyicyclopentadienyl)(ferf-butylamido)diisopropylamidoborane titanium r|’-2,4-hexadiene; (Ti’-tetramethylcyclopentadienyl)(te’-butyiamido)diisopropylamidoborane titanium TI"*-! ,4-dinaphthyl-1,3-butadiene; {Ti’-tetramethylcyclopentadienyl)(tert-butylamido)diisopropylamidoborane titanium vi’-l -phenyl-1,3-pentadiene; (r|’-tetramethylcyclopentadienyl)(terf-butylamido)diisopropylamidoborane titanium ri'‘-l ,3-pentadiene; (Ti’-tetramethylcyclopentadienyl)(cyclohexylamido)diisoprDpylamidoborane titanium dichloride; (TiMetramethylcyciopentadienyl)(cyclohexylamido)diisoprDpylamidoborane titanium dimethyl; (Ti’-tetramettiylcyclopentadienyl)(cyclohexylamido)diisopropylamidoborane titanium bis-dimethylamide; (Ti’-tetramethylcyclopentadienyl)(cycloliexyiamido)diisopropylamidoborane titanium 2-methyl-1,3-butadiene; (TiMetramethylcyclopentadienyl)(cyclohexylamido)diisopropyiamidoborane titanium 2,3-dimethyl-1,3-butadiene; (TiMetramethylcyclopentadienyl)(cyciohexylamido)diisopropylamidoborane titanium 2-N,N-dimethylaminobenzyl; (tiMetramethylcyciopentadienyl)(cyclohexylamido)diisopropylamidoborane titanium allyl; (TiMetramethylcyclopentadienyl)(cyclohexylamido)diisopropylamidoborane titanium TI'-1 ,4-diphenyl-1.3-butadiene; (TiMetramethylcyclopentadienyl)(cyclohexylamido)diisopropylamidoborane titanium Ti’-2,4-hexadiene; (Ti’-tetramethylcyclopentadienyl)(cyclohexylamido)diisopropylamidoborane titanium -n'‘-l ,4-dinaphthyl-1,3-butadiene; ('n’-tetramethylcyclopentadienyl)(cyclohexylamido)diisopropylamidoborane titanium r|’-1-phenyl-1,3-pentadiene; (Ti’-tetramethylcyciopentadienyl)(cyciohexylamido)diisopropylamidoborane titanium -n’-l ,3-pentadiene; (Ti’"tetramethyicyclopentadienyl)(fert-butylamido) bis(diisopropylamide) diborane titanium dichloride; (r|’-tetramethylcyclopentadienyl)(fert-butylamido) bis(diisopropylamide) diborane titanium dimethyl; ('nMetramethylcyclopentadienyl)(te/t-butyiamido) bis(diisopropylamide) diborane titanium bis-dimethylamide; ('n’-tetramethylcyclopentadienyl)(teyt-butylamido)bis(diisopropylamide) diborane titanium 2-methyl-1,3-butadiene; (Ti’-tetramethylcyclopentadienyl)(tert-butylamido) bis(diisopropyiamide) diborane titanium 2,3-dimethyl-1,3-butadiene; (Ti’-tetramethylcyclopentadienyl)(fert-butylamido)bis(diisopropylamide) diborane titanium 2-N,N-dimethylaminobenzyl; (Ti’-tetramethylcyclopentadienyl)(terf-butylamido)bis(diisopropylamide) diborane titanium allyl; (T]’-tetramethylcydopentadienyl)(te/r-butylamido)bis(diisopropylamide) diborane titanium Ti'‘-1,4-diphenyl-1,3-butadiene; (nMetramethylcyclopentadienyl)(ferf-butylamido)bis(diisopropylamide) diborane titanium r|’-2,4-hexadiene; (-n’-tetramethylcyclopentadienyOfte’-butylamido) bis(diisopropylamide) diborane titanium ti’-1,4-dinaphthyl-1,3-butadiene; (TlMetramethylcyclopentadienyl)(terf-butylamido) bis{diisopropylamide) diborane titanium Ti'*-1-phenyl-1,3-pentadiene; (T|’-tetramethylcyclopentadienyl)(fert-butylamido)bis(diisopropylamide) diborane titanium TI'‘-I .3-pentadiene; (TiMetramethylcyclopentadienyl)(phenylamido)diisopropylamidoborane titanium dichloride; (TJ -tetramethylcyclopentadienyl)(phenylamido)diisopropylamidoborane titanium dimethyl; (TiMetramethylcyclopentadienyl)(phenylamido)diisopropylamidoborane titanium bis-dimethylamide; (TiMetramethylcyclopentadienyl)(phenylamido)diisopropyiamidoborane titanium 2-methyl-1,3-butadiene; (ilMetramethylcyclopentadienyi)(phenylamido)diisopropytamidoborane titanium 2,3-dimethyl-1,3-butadiene; ('nMetramethylcyclopentadienyl)(phenylamido)diisopropylamidoborane titanium 2-N,N"dimethylaminoben2yl; (TiMetramethyicyciopentadienyl)(phenylamido)diisopropylamidoborane titanium allyl; (-n’-tetramethylcyclopentadienyl)(phenylamido)diisopropyiamidoborane titanium TI'*-1 ,4-dipheny(-1,3-butadiene; (r|Metramethylcyclopentadienyl)(phenylamido)diisopropylamidoborane titanium V-2,4-hexadiene; {TiMetramethylcyclopentadienyl)(phenylamido)diisopropylamidoborane titanium TI'*-1 ,4-dinaphthyl-1,3-butadiene; (ilMetramethylcyclopentadienyl)(phenylamido)diisopropylamidoborane titanium TI’-1 -phenyl-1,3-pentadiene; (Ti’-tetramethytcyclopentadienyl)(phenylamido)diisopropylamidoborane titanium TI’-1 ,3-pentadiene; (71’-tetramethylcyclopentadienyl)(tert-butylamido)dimethylamidoborane titanium dichloride; (TiMetramethylcyclopentadienyl)(te/t-butylamido) dimethylamidoborane titanium dimethyl; ('nMetramethylcyclopentadienyi)(tert-butylamido) dimethylamidoborane titanium bis-dimethylamide; (TiMetramethylcyciopentadienyl)(tert-butylamido) dimethylamidoborane titanium 2-methyl-1,3-butadiene; (TlMetramethylcyclopentadienyl){fert-butylamido) dimethylamidoborane titanium 2,3-dimethyl-1,3-butadiene; (Ti’-tetramethylcyclopentadienyl)(fe/t-butylamido)dimethylamidoborane titanium 2-N,N-dimettiylaminoben2yl; (T|’-tetramethylcyclopentadienyl)(te/t-butylamido) dimethylamidoborane titanium alkyI; (r|’-tetramethyicyclopentadienyl)(te/r"butylamido) dimethylamidoborane titanium T\’'1 ,4-diphenyl-1,3-butadiene; (rj’-tetramethylcyclopentadienyl)(fe/t-butylamido) dimethylamidoborane titanium 'n'*-2,4-hexadiene; (TiMetramethylcyctopentadienyl)(fe/t-butylamido) dimethylamidoborane titanium TI’-1 ,4-dinaphthyl-1,3-butadiene; (Ti’"tetramethylcyclopentadienyl)(te/t-butylamido) dimethylamidoborane titanium n'‘-l-phenyl-l ,3-pentadiene; (TiMetramethylcyclopentadienyl){fert-butytamido) dimethylamidoborane titanium r{‘-’ ,3-pentadiene; (Ti’-inden-1 -yl)(te/fbutylamido)diisopropylamidoborane titanium dichloride; (ti’'inden-l -yl)(tert-butylamido)diisopronylamidoborane titanium dimethyl; (n’-inden-1-yl)(fert"butylamido)diisopropylamidoborane titanium bis-dimethylamide; (-n’-inden-l -yl)(terf-butylamido)diisopropylamidoborane titanium 2-methyl-1.3-butadiene; (tl’-inden-l -yl)(te/r-butylamido)diisopropylamidoborane titanium 2,3-dimethyl-1,3-butadiene; (n’-inden-1 -yl)(te/t-butylamido)diisopropylamidoborane titanium 2-N,N-dimethylaminobenzyl; (ri’-inden-l -yl)(feff-butylamido)diisopropylamidoborane titanium allyl; (T|’-inden-1 -yl)(ferf-butylamido)diisopropylamidoborane titanium TI'‘-I ,4-diphenyl-1,3-butadiene; (T1’-inden-1 -yl)(te/t-butylamido)diisopropylamidoborane titanium TI’-2,4-hexadiene; (Ti’-inden-1-yl)(terf-butylamido)diisopropylamidoborane titanium V-1,4- dinaphthyl-1,3-butadiene; (Tl’-inden-1-yl)(fe/t-butylamido)diisopropylamidoborane titanium TI*-1 -phenyl- 1,3-pentadiene; (T1’-inden-1-yl)(re/t-butylamiclo)diisopropylamidoborane titanium ti’-1,3-pentadiene; (Ti’-2,3-dimethyl-1-)(tert-butylamido)diisopropylamidoborane titanium dichioride; (r|’-2,3-dimethylinden-1-yl)(te/fbutylamido)diisopropyiamidoborane titanium dimethyl; (Ti’-2,3-dimethylinden-1-yl)(terf-butylamido)diisopropylamidoborane titanium bis-dimethylamide; ('n’-2,3-dimethylinden-1 -yl)(fert"butylamido)diisopropylamidoborane titanium 2-methyl-1,3-butadiene; (Ti’-2,3-dimethylinden-1-yl)(terf"butylamido)diisopropylamidoborane titanium 2,3"dimethyl-1,3-butadiene; (il’-2.3-dimethylinden-1 -yl)(terf"butylamido)diisopropylamidoborane titanium 2-N,N-dimethylaminobenzyl; (Ti’-2,3-dimethylinden-1-yl)(ferfbutylamido)diisopropytamidoborane titanium allyl; (T|’-2,3-dimethylinden-1'yl){te/t-butylamido)diisopropylamidoborane titanium T|’-1,4-diphenyl-1,3-butadiene; (Ti’-2,3-dimethylinden-1-yl)(teAr-butyiamido)diisopropylamidoborane titanium V-2,4-hexadiene; (ti’-2,3-dimethylinden-1-yl){teat-butyiamido)diisopropylamidoborane titanium V-1,4-dinaphthyl-1,3-butadiene; {'n’-2.3-dimethyrmden-1-yl)(tert’butylamido)diisopropylamidoborane titanium Tl*"1 -phenyl-1,3-pentadiene; (Ti’-2,3-dimethylinden-1-yl)(fert-butylamido)diisopropylamidoborane titanium T’’-1,3-pentadiene; (•n’-2-pyn-olidenylinden-1-yl)(terf-butyiamido)diisopropytamidoborane titanium dichioride; (Ti’-2-pyn-olidenylinden-1-yl)(ferf-butylamido)diisopropylamidoborane titanium dimethyl; (Ti’-2-pyrrolidenylinden-1-yl)(terf-butylamido)diisopropylamidoborane titanium bis-dimethylamide; (n’"2-pyrrolidenylinden-1-yl)(rert-butylamido)diisopropyiamidoborane titanium 2-methyl-1,3-butadiene; (Ti’-2-pyrrolidenylinden-1-yl)(tert-butylamido)diisopropylamidoborane titanium 2.3-dimethyl-1,3-butadiene; (Ti’-2-pyn'olidenylinden-1-yl)(te/t-butylamido)diisopropylamidoborane titanium 2-N,N-dimethylaminoben2yl; (ri’-2-pyrrolidenyiinden-1-yl)(teAf-butylamido)diisopropylamidoborane titanium allyl; (T|’-2"pyrrolidenylinden-1-yi)(tert-butylamido)diisopropyiamidoborane titanium Ti'*-1,4-diphenyl-1.3-butadiene; (Ti’"2-pyrroiidenyiinden-1-yl)(fe/t-butylamido)diisopropylamidoborane titanium r|'*-2,4-hexadiene; (T|’-2-pyrrolidenylinden-1-yl)(/e/t-butylamido)diisopropylamidoborane titanium r[‘'1,4-dinaphthyl"1,3-butadiene; (Ti’-2-pyn-olidenyiinden-1-yl)(fert-butylamido)diisopropylamidoborane titanium Ti’-1 -phenyl-1,3-pentadiene; (Ti’2-pyn'olidenylinden-1-yl)(fe/t-butylamido)diisopropylamidoborane titanium Ti**-! ,3-pentadiene; bis-phenylamidobis-bis(diisopropylamido)diborane titanium dichloride; bis-phenylamido-bis(diisopropylamido)diborane titanium dimethyl; bis-phenylamido-bis(diisopropylamido)diborane titanium bis-dimethylamide; bis-phenylamido-bis(diisopropylamido)diborane titanium 2-methyl-1,3-butadiene; bis-phenylamido-bis(diisopropylamido)diborane titanium 2,3-dimethyl-1,3-butadiene; bis-phenylamido-bis(diisopropylamido)diborane titanium 2-N,N-dimethyiaminobenzyl; bis-phenylamido-bis(diisopropylamido)diborane titanium allyl; bis-phenylamidobis(diisopropylamido)diborane titanium TI'*-1 ,4-diphenyl-1,3-butadiene; bis-phenylamidobis{diisopropylamido)diborane titanium’s'*-2,4-hexadiene; bis-phenylamido-bis(diisopropylamido)diborane titanium TI"*-! ,4-dinaphthyl-1,3-butadiene; bis-phenylamido-bis(diisopropylamido)diborane titanium ti'‘-t-phenyl-l ,3-pentadiene; bis-phenylamido-bis(diisopropylamido)diborane titanium TI’-1 ,3-pentadiene; bis-2,6-diisopropylplienylamido-bis(diisopropylamido)diborane titanium dichloride; bis-2,6-diisopropylptienylamido-bis(diisopropylamido)diborane titanium dimethyl; bis-2,6-diisopropylphenylamido-bis(diisopropylamido)diborane titanium bis-dimethylamide; bis-2,6-diisopropyiphenylamido-bis(diisopropylamido)diborane titanium 2-methyl-1,3-butadiene; bis-2,6-diisopropylphenylamido-bis(diisopropylamido)diborane titanium 2,3-dimethyl-1,3-butadiene; bis-2.6-diisopropylphenylamido-bis(diisopropylamido)diborane titanium 2-N,N-dimethylaminobenzyl; bis-2,6-diisopropylphenylamido-bis(diisopropylamido)diborane titanium allyl; bis-2,6-diisopropylphenylamida-bis(diisopropylamido)diborane titanium TI’-1 ,4-diphenyl-1,3-butadiene; bis-2,6-diisopropylphenylamido-bis(diisopropylamido)diborane titanium Ti’-2,4-hexadiene; bis-2,6-diisopropylphenylamido-bis(diisopropylamido)diborane titanium T]’-1 ,4-dinaphthyl-1,3-butadiene; bis-2,6-diisopropylphenylamido-bis(diisopropylamido)diborane titanium V-1 -phenyl-1,3-pentadJene; bis-2,6-diisopropylplienylamido-bis(diisopropylamido)diborane titanium ■n'‘-1,3-pentadiene; bis-3,5-dimethylbenzylamido-bis(dimethylamido)diborane titanium dichloride; bis-3,5-dimethylbenzylamido-bis(dimethylamido)diborane titanium dimethyl; bis-3,5-dimethylbenzylamido-bis(dimethylamido)diborane titanium bis-dimethylamide; bis-3,5-dimethylben2ylamido-bis(dimethyiamido)diborane titanium 2-methyl-1,3-butadiene; bis-3.5-dimethyiben2ylamido-bis(dimethylamido)diborane titanium 2,3-dimethyl-1,3-butadiene; bis-3,5-dimethy!ben2ylamido-bis(dimethylamido)diborane titanium 2-N,N-dimethylaminobenzyl; bis-3,5"dimethylben2ylamido-bis(dimethylamido)diborane titanium alibi; bis-3,5"dimethylben2ylamido-bis(dimethylamido)diborane titanium T’’’-I ,4-diphenyl-1,3-butadiene; bis-3,5-dimethylbenzylamido-bis(dimethylamido)diborane titanium ri’-2,4-hexadiene; biS'3,5-dimethylbenzylamido-bis(dimethyiamido)diborane titanium ri'*-! ,4-dinaphthyl-1,3-butadiene; bis-3,5-dimethylbenzylamido-bis(dimethylamido)diborane titanium T’’'-I -plienyl-1,3-pentadiene; bis-3,5-dimethylben2:ylamido-bis(dimethyiamido)diborane titanium TI’-1 ,3-pentadiene; bis-2,6-dimethylbenzylamido-bis(dimethylamido)diborane titanium dicliloride; bis-2,6-dimethylbenzylamido-bis(dimethylamido)diborane titanium dimethyl; bis-2,6-dimethylbenzylamido-bis(dimethylamido)diborane titanium bis-dimethylamide; bis-2,6-dimethylbenzylamido-bis(dimethylamido)diborane titanium 2-methyl-1,3-butadiene; bis-2,6-dimetiiyibenzylamido-bis(dimethylamido)diborane titanium 2,3-dimethyl-1,3-butadiene; bis-2,6-dimethylbenzylamido-bis(dimethylamido)diborane titanium 2-N,N-dimethylaminobenzyi; bis-2,6-dimethylbenzylamido-bis(dimethylamido)diborane titanium allyl; bis-2,6-dimethylbenzylamido-bis(dimethylamido)diborane titanium r\’’'‘ .4-diphenyl-1,3-butadiene; bis-2,6-dimethylben2ylamido-bis(dimethylamido)diborane titanium V-2,4- hexadiene; bis-2,6-dimethylbenzylamido-bis(dimethylamido)diborane titanium ti'‘-l ,4-dinaphthyl-1,3-butadiene; bis-2,6-dimethylbenzylamido-bis(dimetliylamido)diborane titanium n'‘-l -phenyl-1,3-pentadiene; bis-2,6-dimethylben2ylamido-bis(dimethylamido)diboron titanium TI’-1 ,3-pentadiene; bis-2,6-diisopropylphenylamido-bis(dimethylamino)diborane titanium dichioride; bis-2,6-diisopropylphenylamido-bis(dimethylamido)diborane titanium dimethyl; bis-2,6-diisopropylphenyiamido-bis(dimethylamido)diborane titanium bis-dimethyiamide; bis-2,6-diisopropylphenylamido-bis(dimethylamido)diborane titanium 2-methyl-1,3-butadiene; bis-2,6-diisopropylphenylamido-bis(dimethylamido)diborane titanium 2,3-dimethyl-1,3-butadiene; bis-2,6-diisopropylphenylamido-bis(dimethylamido)diborane titanium 2-N,N-dimethyiaminobenzyl; bis-2,6-diisopropylphenylamido-bis(dimethylamido)diborane titanium ally); bis-2,6-diisoprDpylphenylamido-bis(dimethylamido)diborane titanium rj'‘-l ,4-diphenyl-1,3-butadiene; bis-2,6-diisopropylphenylamido-bis(dimethylamido)diborane titanium V-2,4-hexadiene; bis-2,6-diisopropylphenylamido-bis(dimethylamido)diborane titanium TI’-1 .4-dinaphthyl-1,3-butadiene; bis-2,6-diisopropylphenylamido-bis(dimethylamido)diborane titanium ri'‘-l -phenyl-1.3-pentadiene; bis-2,6-diisopropylphenylamido-bis(dimethylamido)diborane titanium i\’-1,3-pentadiene; bis-2.6-diisopropylphenylamido-bis(bis(trimethylsilyl)amido)diborane titanium dichioride; bis-2,6-diisopropylphenylamido-bis(bis(trimethylsilyl)amido)diborane titanium dimethyl; bis-2,6-diisoprapyiphenylamido-bis(bis(trimethyisilyl)amido)diborane titanium bis-dimethylamide; bis-2,6-diisoprDpylphenylamido-bis(bis(trimethylsilyl)amido)diborane titanium 2-methyl-1.3-butadiene; bis-2,6-diisopropylphenylamido-bis(bis(trimethylsilyl)amido)diborane titanium 2,3-dimethyl-1,3-butadiene; bis-2,6-diisopropylphenylamido-bis(bis(trimethylsilyl)amido)diborane titanium 2-N,N-dimethylaminoben2yl; bis-2,6-diisopropylphenylamido-bis(bis(trimethylsilyl)amido)diborane titanium allyl; bis-2,6-diisopropylphenylamido-bis(bis(trimethylsilyl)amido)diborane titanium ri’-1.4-diphenyl-1,3-butadiene; bis-2,6-diisopropylpiienylamido-bis(bis(trimethylsiiyl)amido)diborane titanium V-2,4-hexadiene; bis*2,6-diisopropylphenyiamido-bis(bis(trimethylsilyl)amido)diborane titanium V"1,4"dinaphthyl-1,3-butadiene; biS"2,6-diisopropylphenylamido-bis(bis(trimethylsilyl)amido)diborane titanium n’’-l -phenyl-1,3-pentadiene; bis-2,6-diisopropylphenylamido-bis(bis(trimethylsilyl)amido)diborane titanium V-1.3-pentadiene; bis-2,6-diisopropylphenyiamido-bis(diisopropylamido)diborane zirconium dichloride; bis-2,6-diisopropylphenyiamido-bis(diisopropylamido)diborane zirconium dimethyl; bis-2,6-diisopropylphenylamido-bis(diisopropylamido)diborane zirconium bis-dimethylamide; bis-2,6-diisopropylphenylamidO"bis(diisopropylamido)diborane zirconium 2-methyl-1,3-butadiene; bis-2.6-diisopropylphenylamido-bis(diisopropylamido)diborane zirconium 2,3-dimethyl-1.3-butadiene; bis-2,6-diisopropylphenylamido-bis(diisopropylamido)diborane zirconium 2- N,N-dimethytaminobenzyl; bis-2.6-diisopropylphenylamido-bis(diisopropyiamido)diborane zirconium allyl; bis-2,6-diisopropylphenylamido-bis(diisoprDpylamido)diborane zirconium V- 1,4-diphenyl-1,3-butadiene; bis-2,6-diisopropylphenylamido-bis(diisopropylamido)diborane zirconium Ti'*- 2,4-hexadiene; bis-2,6Kliisopropylphenylamido-bis(dKsopropylamido)diborane zirconium ti"*-1.4"dinaphthyl-1,3-butadiene; bis-2,6-diisopropylphenyiamido-bis(diisopropyiamido)diborane zirconium r\’-1 -plienyl-1.3-pentadiene; bis-2,6-diisopropylphenylamido-bis(diisopropylamido)diborane zirconium ri"-1,3-pentadiene; bis-2-tert-butylphenylamido-bis(diisopropytamido)diborane titanium dichloride; bis-2-te/fbutylphenylamido-bis(diisopropylamido)diborane titanium dimethyl; bis-2-terf-butyiphenylamido-bis(diisopropyiamido)diborane titanium bis-dimethylamide; bis-2-fert-butylphenylamido-bis(diisopropylamido)diborane titanium 2-methyl-1,3-butadiene; bis-2"tert-butyiphenylamido-bis(diisopropylamido)diborane titanium 2,3-dimethyl-1.3-butadiene; bis-2-ferf-butylphenylamido-bis(diisopropylamido)diborane titanium 2-N,N-dlmethylaminobenzyl; bis-2-tert-butylphenylamido-bis(diisopropylamido)diborane titanium allyl; bis-2-terf-butylphenylamido-bis(diisopropylamido)diborane titanium TI’-1 ,4-diphenyl-1,3-butadiene; bis-2-fe/t-butylphenyiamido-bis(diisopropylamido)diborane titanium ri'‘-2,4-hexadiene; bis-2-te/t-butyiphenyiamido-bis(diisopropylamido)diborane titanium TI’-I ,4-dinaphthyl-1,3-butadiene; bis-2-fe/t-butylphenylamido-bis(diisopropylamido)diborane titanium V-1 -phenyl-1,3-pentadiene; and bis-2-fe/t-butylphenylamido-bis(diisopropylamido)diborane titanium -'l ,3-pentadiene. A further preferred class of Group 4 transition metal complexes of the present invention are represented in previously defined formulas 4-9 wherein T is : including such stmctures where two R’ groups and R’ are linked such as in 1,3,4,6,7,8, hexahydro-pyrimido[1,2-a] pyrimidinate, shown below: In the foregoing species, it is believed, without wishing to be bound by such belief, that the ligand group, T, is connected to Z via the heteroatoms thereof. Specific, but not limiting, examples of the foregoing metal complexes included within the invention are: N,N'-diisopropyl-phenyl-amidinateborane-bis-Ti’-cyciopentadienylzirconium dichloride; N,N'"diisopropyl-phenyl-amidinateborane-bis-n’-cyclopentadienylzirconium dimethyl; N.N'-diisopropyl-phenyl-amidinateborane-bis-Ti’-cydopentadienylzirconium bis-dimethylamide; N,N '-diisopropyl-phenyl-amidinate borane-bis-ii’-cyclopentadlenylzirconium 2-methyl-1.3-butadiene; N,N'-diisopropyl-phenyl-amidinateborane-bis-7i’-cyclopentadienylzirconJum 2,3-dimethyl-1,3-butadiene; N,N'-diisopropyl-phenyl-amidinateborane-bis-r|’-cyclopentadienylzirconium2-N,N-dimethylaminobenzyl; N.N'-diisopropyl-phenyl-amidinateborane-bis-T’’-cyclopentadienyizirconium allyl; N,N'-diisopropyl-phenyl-amidinateborane-bis-T|’-cyclopentadienylzirconium 7\’'‘ ,4-diphenyl-1,3-butadiene; N,N'"diisopropyl-phenyl-amidinateborane-bis-Ti’-cyclopentadienylzircQnium Ti’-2,4-hexadiene; N.N'-diisopropyl-phenyl-amidinateborane-bis-Ti’-cyclopentadienylzirconium V-1,4-dinaphthyl-1,3-butadiene; N,N'-diisopropyl-phenyl-amidinateborane-bis-Ti’-cyclopentadienyizirconium V"1 -phenyl-1,3-pentadiene; N.N'-diisopropyl-phenyl-amidinateborane-bisV-cyclopentadienyizirconium Ti'*-1,3-pentadiene; N,N'-diisopropyl-3-phenyl-1,3-diketimine borane-bis-ri’-cyclopentadienylzirconiumdichloride; N,N'-diisopropyl-3-phenyl-1,3-diketimine borane-bis-ri’-cyclopentadienylzirconium dimethyl; N,N'-diisopropyl-3-phenyl-1,3-diketimine borane-bis-Tj’-cyclopentadienylzirconium bis-dimethylamide; N,N'-diisopropyl-3-phenyl-1,3-diketimine borane-bis-ri’-cydopentadienylzirconium 2-methyl-1,3-butadiene; N,N'-diisopropyl-3-phenyl-1,3-diketimine borane-bis-ti’-cyclopentadienylzirconium 2.3-dimethyl-1,3-butadiene; N,N'-diisopropyl-3-phenyl-1,3-diketimine borane-bis-n’-cyclopentadienylzirconium2-N,N-dimethylaminobenzyl; N,N'-diisopropyl-3-phenyl-1,3-diketimine borane-bis-ii’-cyclopentadienylzirconium allyl; N,N'-diisopropyl-3-phenyl-1,3-diketimine borane-bis-q’-cyclopentadienylzirconium V-1,4-diphenyl-1.3-butadiene; N,N'-diisoprop/l-3-phenyi-1,3-diketimine borane-bis-ti’-cyclopentadienylzirconiumii’-2,4-hexadiene; N,N'-diisopropyl-3-phenyl-1,3-diketimine borane-bis-ii’-cyclopentadienylzirconium TI'‘-I ,4-dinaphthyl-1.3-butadiene; N,N'-diisopropyl-3-phenyl-1,3-diketimina borane-bis-n’-cyclopentadienylzirconium TI’’-I -phenyl-1,3-pentadiene; N,N'-diisopropyl-3-phenyl-1,3-diketimine borane-bis-Ti’-cyclopentadienylzirconium TI"*-! ,3-pentadiene; N,N'-diisopropyl-dimethyiguanidinateborane-bis-T|’-cyclopentadienylzirconiumdichloride; N,N'-diisopropyl-dimethylguanidinate borane-bis-Ti’-cyclopentadienylzirconium dimethyl; N,N '-diisopropyl-dimethylguanidinate borane-bis-Ti’-cyclopentadienylzirconium bis-dimethylamide; N,N '-diisopropyl-dimethylguanidinate borane-bis-ri’-cyclopentadienylzirconium 2-methyl-1,3-butadiene; N.N -diisopropyl-dimethylguanidinate borane-bis-T]’-cyclopentadienylzirconium 2,3-dimethy(-1,3-butadiene; N,N'-diisopropyl-dimethylguanidinate borane-bis-r|’-cyclopentadienylzirconium2-N,N-dimethylaminobenzyl; N,N '-diisopropyl-dimethylguanidinate borane-bis-ri’-cyciopentadienylzirconium allyl; N,N'-diisopropyl-dimethylguanidinateborane-bis-ii’-cyclopentadienylzirconium r|'*-1.4-diphenyl-1,3-butadiene; N,N'-diisopropyl-dimethylguanidinate borane-bis-r|’-cyclopentadienylzirconiumTi'*-2,4-hexadiene; N,N '-diisopropyl-dimethylguanidinate borane-bis-r|’-cyclopentadienylzirconium TI’-1 ,4-dinaphthyl-1,3-butadiene; N,N'-diisopropyl-dimethylguanidinate borane-bis-ri’-cyclopentadienylzirconium TI’’-I -phenyl-1,3-pentadiene; N,N'-diisopropyl-dimethylguanJdinateborane-bis-n’-cyclopentadienylzirconium ti’-1,3-pentadiene; 1.3,4.6,7,8-hexahydro-pyrimido[1,2-a] pyrimidinate borane-bis-n’-inden-1-ylzirconium dichloride; 1,3,4,6,7,8-hexahydro-pyrimido[1,2-a] pyrimidinate borane-bis-ri ‘-inden-1-ylzirconium dimethyl; 1,3.4.6,7,8-hexahydro-pyrimido[1,2-a] pyrimidinate borane-bis-n’-mden-1 -ylzirconium bis-dimethylamide; 1,3,4,6.7,8-hexahydro-pyrimido[1,2-a] pyrimidinate borane-bis-Ti’-inden-1 -ylzirconium 2-methyl-1.3-butadiene; 1,3,4,6,7,8-hexahydro-pyrimido[1,2-a] pyrimidinate borane-bis-n’-inden-l-ylzirconium 2,3-dimethyl-1,3-butadiene; 1,3,4,6,7,8-hexahydro-pyrimido[1,2-a] pyrimidinate borane-bis-ti’-inden-l-ylzirconium2-N,N-dimethylaminobenzyl; 1,3,4,6,7,8-hexahydro-pyrimido[1,2-a] pyrimidinate borane-bisti’-inden-l-ylzirconium allyl; 1,3.4,6,7,8-hexahydro-pyrimido[1.2-a] pyrimidinate borane-bis-n’-inden-l - ylzirconium ri'‘-l ,4-diphenyl-1,3-butacliene; 1,3,4,6,7,8-hexahydro-pyrimido[1,2-a] pyrimidinate borane-bis-Ti’-inden-1 ylzirconium Ti'*-2.4-hexadiene; 1,3,4,6,7,8-hexahydro-pyrimido[1,2-a] pyrimidinate borane-bis-Ti’-inden-l ylzirconium T|’-1 ,4-dinaphthyl-1,3-butadiene; 1,3,4,6.7,8-hexahydro-pyrimido[1,2-a] pyrimidinate borane-bis-Ti’-inden-1 ylzirconium TI’-1 -phenyl-1,3-pentadiene; 1.3,4,6,7,8-hexahydro-pyrimido[1,2-a] pyrimidinate borane-bis-Ti’-inden-1 ylzirconium r\’-’ ,3-pentadiene; N,N'-diisopropyl-phenyl-amidinateborane-bis-Ti’-(2-methylinden-1-yl)zirconium dichioride; N,N'-diisopropyl-phenyl-amidinateborane-bis-Ti’-(2-methyiinden-1-yl)zirconium dimethyl; N,N '-diisopropyl-phenyl-amidinate borane-bis-Ti’-(2-methylinden-1 -yl)zirconium bis-dimethylamide; N,N'-diisopropyl"phenyl-amidinateborane-bis-Ti’-(2-methylinden-1-yl)zirconium 2-methyM ,3-butadiene; N,N'-diisopropyl-phenyl-amidinate borane-bis-Ti’-(2-methylinden-1-yl)zirconium 2,3-dimethyl-1,3-butadiene; N,N'-diisopropyl-phenyl-amidinate -bis-Ti’-(2-methylinden-1-yi)zirconium2-N,N-dimethylaminobenzyl; N,N'-diisopropyl-phenyl-amidinate borane-bis-r|’-(2-methylinden-1-yl)zirconium allyl; N,N'-diisopropyl-phenyl-amidinate borane-bis-Ti’-(2-methylinden-1-yl)zirconium TI’-1 ,4-diphenyl-1,3-butadiene; N,N'-diisopropyl-phenyl-amidinateborane-bis-Ti’-(2-methylinden-1-yl)zirconium 7i'*-2,4-hexadJene; N,N'-diisopropyl-phenyl-amidinate borane-bis-Ti’-(2-methylinden-1 -yl)zirconium V-1,4-dinaphthyl-1.3-butadiene; N,N'-diisopropyl-phenyl-amidinate borane-bis-'n’-(2-methylinden-1-yl)zirconium TI’-1-phenyl-1,3-pentadiene; N,N'-diisopropyl-phenyl-amidinate borane-bis-Ti’-(2-methylinden-1-yl)zirconium V-1,3-pentadiene; N,N '-bis-2,6-dusopropylphenyl-phenyl-amidinate borane-bis-n"*-phenylinden-1 -yl)zirconium dichloride; N,N '-bis-2,6-diisopropylphenyl-phenyl-amidinate borane-bis-ii’-phenyiinden-1 -yt)zirconium dimethyl; N,N '-bis-2,6-diisopropylphenyl-phenyl-amidinate borane-bis-T]’-phenylinden-1 -yl)z!rconium bis-dimethyiamide; N,N'-bis-2,6-diisopropylphenyl-phenyl-amidinate borane-bis-r|’-phenylinden-1 -yl)zirconium 2-methyl-1,3-butadiene; N,N'-bis-2,6-diisopropylphenyl-phenyi-amidinateborane-bis-ri’-phenylinden-1 -yl)zirconium 2,3-dimethyl-l ,3-butadiene; N,N '-bis-2,6-diisopropylphenyl-phenyl-amidinate borane-bis-ri’-phenylinden-1 -yl)zirconium 2-N,N-dimethylaminobenzyl; N,N '-bis-2,6-diisopropylphenyl-phenyl-amidinate borane-bis-n’-phenylinden-1 -yl)zirconium allyl; N.N '-bis-2,6-diisopropylphenyl-phenyl-amidinate borane-bis-T|’-phenylinden-1 -yOzirconium TI'*-1 ,4-diphenyl-1,3-butadiene; N,N '-bis-2,6-diisopropylphenyl-phenyl-amidinate borane-bis-T)’-phenylinden-1 -yl)zirconium Ti’-2,4-hexadiene; N,N '-bis-2,6-diisopropylphenyl-phenyl-amidinate borane-bis-ti’-phenylinden-1 -yl)zirconium TI'‘-I ,4-dinaphthyt-1,3-butadiene; N,N '-bis-2,6-diisopropylphenyl-phenyl-amidinate borane-bis-ri’-phenylinden-1 -yl)zirconium V-1 -phenyl-1,3-pentadiene; N,N'-bis-2,6-diisopropylphenyl-phenyl-amidinate borane-bis-q’-phenylinden-1 -y!)zirconium V"' ,3-pentadiene; 2-methyl-4- 2-methyl-4- 2-methyl-4- 2-methyl-4- 2-methyl-4- 2-methyl-4- 2-methyl-4- 2-methyl-4- 2-methyl-4- 2-methyl-4- 2-methyl-4- 2-methyl-4- N,N'-bis-2,6-diisopropylphenyl-3-methyl-1,3-diketimine borane-bis-Ti’-(2-methyl-4-phenylinden-1 -yl)zirconium dichloride; N,N'-bis-2,6-diisopropylphenyl-3-methyl-1,3-diketimineborane-bis-ti’-(2-methyl-4-phenylinden-1 -yl)zirconium dimethyl; N,N'-bis-2,6-diisopropylphenyl-3-methyl-1,3-diketimineborane-bis-Ti’-(2-methyl-4-phenylinden-1 -yl)zirconium bis-dimethylamide; N,N'-bis-2,6-diisopropylphenyl-3-methyl-1,3-diketimineborane-bis-Ti’-(2-methyl-4-phenylinden-1-yl)zirconium 2-methyl-1,3-butadiene; N,N'-bis-2.6-diisopropytphenyl-3-methyM ,3-diketimine borane-bis-t] ‘-(2-methyi-4-phenylinden-1 -yl)zirconium 2,3-dimethyl-1,3-butadiene; N,N '-bis-2,6-diisopropylphenyl-3-methyl-1,3-diketimine borane-bis-r|’-{2-methyl-4-phenylinden-1 -yi)zirconium 2-N,N-dimethylaminobenzyl; N,N'-bis-2,6-diisopropylphenyl-3-methyl-1,3-diketimine borane-bis-Ti’-(2-methyl-4-phenylinden-1 -yl)zirconium allyl; N,N'-bis-2,6-diisopropylphenyl-3-methyl-1.3-diketimineborane-bis-'n’-{2-methyl-4-phenylinden-1-yl)2irconium y]’'‘ ,4-diphenyt-1,3-butadiene; N,N '-bis-2,6-diisopropylphenyl-3-methyl-1,3-diketimine borane-bis-'n’"(2-methyl-4-phenylinden'1 -yl)zirconium Ti'‘-2,4-hexadiene; N,N'-bis-2,6-diisopropylphenyl-3-methyl-1,3-diketimine borane-bJs-ri’-(2-methyl-4-phenyl(nden-'1 -yl)zirconium ‘-1,4-dinaphthyl-1,3-butadiene; N,N '-bis-2,6-diisopropyiphenyl-3-methyl-1,3-diketimine borane-bis-T]’-(2-methyl-4-phenylinden-1-yl)zirconium Ti’-1-phenyl-1,3-pentadiene; N,N'-bis-2,6-diisopropylphenyl-3-methyl-1,3-diketimine borane-bis-q’-(2' methyl-4-phenylinden-1 -yl)zirconium ‘-1,3-pentadiene; bis(N,N'-diisopropyi-phenyl-amidinate)diborane-1,2-bis-Ti -(2-methyl-4-phenylJnden-1 -yl)zirconJum dichloride; bis(N,N'-diisopropyl-phenyl-amidinate)diborane-1,2-bis-ii’-(2-methyl-4-phenylinden-1 -yi)zirconium dimethyl; bis(N,N'-diisopropyi-phenyl-amidinate)diborane-1,2-bis-'n’-(2-methyl-4-phenylinden-1 -yl)zirconium bis-dimethylamide; bis(N,N'-diisopropyl-phenyi-amidinate)diborane-1,2-bis-'n’-(2-methyl-4-phenylinden-1 -yl)zirconium 2-methyl-1,3-butadiene; bis(N,N'-dlisopropyl-phenyl-amidinate)diborane-1,2-bis-r|’-(2-methyl-4-phenylinden-1 -yl)zirconium 2,3-dimethyl-1,3-butadiene; bis(N,N'-diisopropyl-phenyl-amidinate)diborane-1,2-bis-Ti’-(2-methyl-4-plienylinden-1 -yl)zirconium 2-N,N-dimethylaminobenzyl; bis(N,N'Hdiisopropyl-phenyl-amidinate)diborane-1,2-bis-Ti’-(2-methyl-4-phenylinden-1 -yl)zirconium allyl; bis(N,N'-diisopropyl-phenyl-amidinate)diborane-1,2-bis-Ti’-(2-methyl-4- phenylinden-1-yl)zirconium ii'‘-l ,4-diphenyl-1,3-butadiene; bis(N,N'-diisopropyl-phenyl-amidinate)diborane-1,2-biS'Ti’-(2-methyl-4-phenylinden-1 -yl)zirconium Ti'*-2,4-hexadrene; bis(N.N'-diisopropyi-phenyl-amidinate)diborane-1.2-bis-r|’-(2-methyl-4-phenylinden-1-yl)zirconium Ti'*-1,4-dinaphthyl-1,3-butadiene; bis(N,N'-diisopropyl-phenyl-amidinate)diborane-1,2-bis-Ti’-(2-methyl-4-phenylinden-1-yl)zirconium ii’-1-phenyl-1,3-pentadiene; bis(N,N'-diisopropyl-phenyl-amidinate)diborane-1,2-bis-Ti’-(2-methyl-4-phenylinden-1 -yl)zirconium TI’’-I ,3-pentadiene; bis(N,N'-diisopropyl-3-pheny!-1,3-diketimine)diborane-1,2-bis-Ti’-(2-methyl-4--phenylinden-1 -yl)zirconium dichloride; bis(N,N'-diisopropyl-3-phenyl-1.3-diketimine)diborane-1,2-biS"Ti’-(2-methyl-4-phenylinden-1 -yl)zirconium dimethyl; bis(N,N'-diisopropyl-3-phenyl-1.3-diketimine)diborane-1,2-bis-'n’-(2-methyl-4-phenylinden-1 -yOzirconium bis-dimethylamide; bis(N,N'-dilsopropyl-3-phenyl-1,3-diketimine)diborane-1,2-bis-ri’-(2"methyl-4-phenylinden-1 -yl)zirconium 2-methyl-1,3-butadiene; bis(N,N'-diisopropyl-3-phenyl-1,3-diketimine)diborane-1,2-bis-Ti’-(2-methyl-4-phenylinden-1 -yl)zirconium 2,3-dinfiethyl-1,3-butadiene; bis(N,N'-diisopropyl-3-phenyl-1,3-diketimine)diborane-1,2-bis-r|’-(2-methyl-4-phenyli’den-1 -yl)zirconium 2-N,N-dimethyiaminobenzyi; bis(N,N'-diisopropyl-3-phenyl-1,3-diketimine)diborane-1,2-bis-T|’-(2-methyl-4-phenylinden-1 -yl)zirconium allyl; bis(N,N'-diisopropyl-3-phenyl'1,3-diketimine)diborane-1,2-bis-n’-(2-methyl-4-phenylinden-1 -yl)zirconium ‘-1,4-diphenyl-l ,3-butadiene; bis(N,N 'diisopropyl"3-phenyl'1.3-diketimine)diborane-1,2-bis-n’-(2-methyl-4-phenylinden-1 -yi)zirconium Ti'*-2,4-hexadiene; bis(N.N'-diisopropyl-3-phenyM,3-diketimine)diborane-1,2-bis-T|’-(2-metliyi-4-phenylinden-1 -yl)zirconium TI'*-1 ,4-dinaphthyl-1,3-butadiene; bis(N,N'-diisopropyl-3-phenyl-1,3-diketimine)diborane-1,2-bis-Ti’-(2-methyl-4- phenylinden-1 -y()zirconium V-1 -phenyl-1,3-pentadiene; bis(N,N'-diisopropyl-3-phenyl-1,3-diketimine)diborane-1,2-bis-T|’-(2-methyl-4- phenylinden-1-yl)zirconium rj'*-! ,3-pentadiene; N,N'-diisopropyl-phenyl-amidinate borane-bis-r|’-(2-methyl-4-naphthylinden-1 yl)zirconium dichloride; N,N '-diisopropyi-phenyl-amidinate borane-bis-'n’-{2-methyl-4- naphthylinden-1-yl)zirconium dimethyl; N, N'-diisopropyi-phenyl-amidinate borane-bis-Ti’-(2-methyl-4- naphthylinden-1 -yl)2irconium bis-dimethylamide; N,N'-diisopropyl-phenyl-amidinate borane-bis-Ti’-(2-methyl-4- naphthylinden-1-yl)2irconium 2-methyl-1,3-butadiene; N,N '-diisopropyl-phenyl-amidinate borane-bis-rj’-(2-methyl-4- naphthylinden-l-yl)zirconium 2,3-dimethyl-1,3-butadiene; N,N'-diisopropyl-phenyl-amidinate borane-bis-Ti’-(2-methyl-4- naphthylinden-1 -yl)2irconium 2-N,N-dimethylaminoben2yl; N,N'-diisopropyl-phenyl-amidinate borane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)zirconiumallyl; N,N'-diisopropyl-phenyl-amidinate borane-bis-Ti’-(2-methy 1-4-naphthylinden-1 -yl)zirconium TI’-1 ,4-diphenyl-1.3-butadiene; !'l,N'-diisopropyl-phenyl-amidinateborane-bis-Ti’-{2-methyl-4-naphthylinden-1-yl)zirconium Ti’-2,4-hexadiene; N,N'-diisopropyl-phenyl-amidinateborane-bis-r|’-(2-methyl-4-naphtfiylinden-1 -yl)zirconium TI"*-! ,4-dinaphthyl-1,3-butadiene; N,N '-diisopropyl-phenyl-amidinate borane-bis-T|’-(2-methyl-4- naphthylinden-1 -yl)zirconium TI’-1 -phenyl-1,3-pentadiene; N,N '-diisopropyl-phenyl-amidinate borane-bis-Ti’-(2-methyl-4- naphthylinden-1 -yl)zirconium TI’-1 .3-pentadiene; N,N'-diisopropyl-3-phenyl-1,3-diketimineborane-bis-T|’-(2-methyl-4-naphthylinden-1 -yl)zirconium dichloride; N,N'-diisopropyl-3-phenyl-1,3-diketimineborane-bis-Ti’-(2-methyl-4-naphthylinden-1 -yl)zirconium dimethyl; N,N'-diisopropyl-3-phenyl-1,3-diketimineborane-bis-T|’-(2-methyl-4- naphthylinden-1 -yl)zirconium bis-dimethylamide; N,N'-diisopropyl-3-phenyl-1,3-diketimineborane-bis-Ti’-(2-methyl-4- naphthylinden-1-yl)zirconium 2-methyl-1,3-butadiene; N,N'-diisopropyl-3-phenyl-1.3-diketimineborane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)zlrconium 2,3-dimethyl-1,3-butadiene; N,N '-diisopropyl-3-phenyl-1,3-diketimine borane-bis-Ti’-(2-methyl-4-naphthylinden-1-yl)2irconium 2-N,N-dimethylaminobenzyl; N,N'-diisopropyl-3-phenyl-1,3-diketimineborane-bis-ri’-(2-methyl-4-naphthylinden-1 -yl)2irconium ally!; N,N'-diisopropyl-3-phenyl-1,3-diketimine borane-bis-'n’-{2-methyl"4-naphthylinden-1-yl)2irconium TI’-1 ,4-diphenyl-1,3-butadiene; N,N'-diisopropyl-3-phenyM ,3-diketimine borane-bis-T| ‘-(2-methyl-4-naphthy(inden-1 -yOzirconium •n'*-2,4-hexadiene; N,N'-diisopropyl-3-phenyl-1,3-diketimine borane-bis-Ti’-(2-methyl-4-naphthylinden-1-yOzirconium TI'*-1 ,4-dinaphthyl-1,3-butadiene; N,N'-diisopropyl-3-phenyl-1,3-diketimine borane-bis-ti ‘-(2-methyl-4-naphthylinden-1-yOzirconium ti'‘-l-phenyl-l ,3-pentadiene; N,N'-diisopropyl-3-phenyl-1,3-diketimine borane-bis-'n’-(2-methyl-4-naphthylinden-1-yl)zirconium t’’-i ,3-pentadiene; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-phenyl-amidinate)diborane titanium dichloride; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-phenyl-amidinate)diborane titanium dimethyl; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-phenyl-amidinate)diborane titanium bis-dimethylamide; bis-2,6-diisoprapylphenylamido-bis{N,N'-diisopropyi-phenyl-amidinate)diborane titanium 2-methyl-1,3-butadiene; bis-2.6-diisopropylphenylamido-bis(N,N'-diisopropyl-phenyl-amidinate)diborane titanium 2,3-dimethyi-1,3-butadiene; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-phenyl-amidinate)diborane titanium 2-N,N-dimethylaminobenzyl; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-phenyi- amid(ante)diborane titanium allyl; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-phenyi- amidinate)dlborane titanium Ti'‘-1,4-diphenyl-1,3-butadiene; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-phenyl-amidinate)diborane titanium Ti’-2,4-hexadiene; biS"2,6-diisopropylphenylamidO"bis(N,N'-diisopropyl-phenyl-amidinate)diborane titanium T|’-1 ,4-dinaphthyl-1,3-butadiene; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-phenyl-amidinate)diborane titanium r|’-1-phenyl-1,3-pentadiene; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-phenyl-amidinate)diborane titanium r[‘-’ ,3-pentadiene; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-3-phenyl-1,3-diketimine)diborane titanium dichloride; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-3-phenyl"1,3-diketimine)diborane titanium dimethyl; bis-2,6-diisopropylphenylamido-bis(N.N'-diisopropyl-3-phenyl-1,3-diketimine)diborane titanium bis-dimethylamide; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-3-phenyl-1,3-diketimine)diborane titanium 2-methyl-1,3-butadiene; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-3-phenyl-1,3-diketimine)diborane titanium 2,3-dimethyl-1,3-butadiene; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-3-phenyl-1.3-diketimine)diborane titanium 2-N,N-dimethylaminobenzyl; bls-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-3-phenyl-1,3-diketimine)diborane titanium allyl; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-3-phenyl-1,3-diketimine)diborane titanium •n'*-1.4-diphenyl'1,3-butadiene; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyl-3-phenyl-1,3-diketimine)diborane titanium T|’-2,4-hexadiene; bis-2,6-diisopropylphenylamido-bis(N,N'-diisopropyi-3-phenyl-1,3- diketimine)diborane titanium TI’-1 ,4-dinaphthyl-1,3-butadiene; bis-2,6-diisopropylphenylamido-bis(N.N'-diisopropyl-3-phenyl-1,3-diketimine)diborane titanium ti’-1 -phenyl-1,3-pentadiene; and bis-2,6-diisopropylphenyiamido-bis(N,N'-diisopropyl-3-phenyl-1,3-diketimine)diborane titanium V-1,3-pentadiene. The skilled artisan will recognize that additional members of the foregoing list, such as those wherein boron is replaced by aluminum are also included within the invention. Moreover, it should also be recognized that the terms TI’ or TI"* may not accurately reflect the actual electronic distribution of the molecule under use conditions, and that molecules including lesser numbers of contributing atoms to the electronic relocation are intended to be included within such descriptions as well. The most highly pretended metal complexes are dimethylamidoborane-bis(r|’-cyclopentadienyl)zirconium dichloride, dimethylamidoboranebis(Ti’"inden-l -yl)zirconium dichloride. dimethyiamidoborane-bis(Ti’-2-methyl-4-phenylinden-1 -yl)zirconium dichloride, dimethylamidoborane-bis(Ti’-2-ethyl-4-phenylinden-1 -yl)zirconium dichloride, dimethylamidoborane-bis(Ti’-2-isopropyl-4-phenylinden-1 -yt)zirconium dichloride, dimethylamidoborane-bis(r|’-2-methyl-4-bis(3,5- trifluoromethyl)phenyl!nden-1 -yl)zirconium dichloride, dimethylamidoborane-bis(Ti’-3-t-butylinden-1 -yl)zirconium dichloride, diisopropylamidoborane-bis(Ti’-cyclopentadienyl)zirconium dichloride, diisopropylamidoboranebis(Ti’-inden-1 -yl)zirconium dichloride. diisopropyiamidoborane-bis(Ti’-2-methyl-4-phenyiinden-1-yl)zirconium dichloride, diisopropylamidoborane-bis(ri’-2-ethyl-4-phenylinden-1-yl)zirconium dichloride, diisopropylamidoborane-bis(ii’-2-isopropyl-4-phenylinden-1-yl)zirconium dichloride, diisopropylamidoborane-bis(Ti’-2-methyl-4-bls(3,5-trifluoromethyl)phenylinden-1-y’zirconium dichloride, diisopropylamidoborane-bis(Ti’-3-t-butylinden-1 -yl)zirconium dichloride, diphenylamidoborane-bis(Ti’-cyclopentadienyl)zirconium dichloride, diphenylamidoboranebis(Ti’-inden-1 -yOzirconium dichloride, diphenylamidoborane-bis(Ti’-2-methyl-4-phenylinden-1 -yl)zirconium dichloride, diphenylamidoborane-bis(Ti’-2-ethyl-4-phenylinden-1 -yl)zirconium dichloride, diphenylamidoborane-bis(T)’-2-isopropyi-4-phenylinden-1 -yl)zirconium dichloride, diphenylamidoborane-bis(-n’-2-methyl-4-bis(3,5-trifluoromethyl)phenyiinden-1-yl)zirconium dichloride, diphenylamidoborane-bis(Ti’-3-t-butylinden-1-yl)zirconium dichloride, dimethylamidoborane-bis(T|’-cyclopentadienyl)zirconium 1.4-diphenyl-1,3-butadiene, dimethylamidoboranebis(Ti’-inden-1 -yl)zirconium 1,4-diphenyl-1,3-butadiene, dimethylamidoborane-bis(ri’-2-methyl-4-phenylinden-1-yl)zirconium 1,4-diphenyl-1,3-butadiene, dimethylamidoborane'bis(T]’-2-ethyl-4-phenyrmden-1 -yl)zirconium 1,4-diphenyl-1,3-butadiene, dimethylamidoborane-bis('n’-2-isopropyl-4-phenylinden-1-yl)zirconium 1,4-diphenyl-1,3-butadiene, dimethylamidoborane-bis{Ti’-2-methyl-4-bis(3,5-trifluoromethyl)phenylinden-1 -yl)zirconium 1,4-dlphenyl-1,3-butadiene, dimethylamidoborane-bis(Ti’-3-t-butylinden-1-yl)zirGonium 1,4-diphenyl-1,3-butadiene. diisopropylamidoborane-bis(Ti’-cyclopentadienyl)zirconium 1,4-diphenyl-1,3-butadiene, diisopropylamidoboranebis(Ti’-inden-1-yl)zirconium 1,4-diphenyl-1,3-butadiene. diisopropylamidoborane-bis(Ti’"2-methyl-4"phenylinden-1-yl)zirconium 1,4-diphenyM ,3-butadiene, diisopropylamidoborane-bis(Ti’-2-ethyl'4-phenylinden-1 -yl)zirconJum 1,4-diphenyl-1,3-butadiene, diisopropylamidoborane-bis(Ti’-2-isopropyl-4-phenylinden-1 -yl)zirconium 1,4-diphenyl-1,3-butadiene, diisopropylamidoborane-bis(Ti’-2-methyl-4-bis(3,5-trifiuoromethyl)phenyiinden-1-yl)zirconium 1,4-diphenyl-1,3- butadiene, diisopropylamidoborane-bis(Ti’-3-t-butylinden-1-yl)zirconium 1,4-diphenyl-1,3-butadiene, diphenylamJdoborane"bis(Ti’-cyclopentadienyl)zirconium 1,4-diphenyl-1,3-butadiene, diphenylamidoboranebis(Ti’-inden-1-yl)zirconium 1,4-diphenyl-1,3-butadiene. diphenylamidoborane-bis(ti’-2-methyl-4-phenylinden-1 -yl)zirconium 1,4-diphenyl-1,3-butadiene, diphenylamidoborane-bis(ri’-2-ethyl-4-phenylinden-1 -yl)zirconium 1,4-diphenyl-1.3-butadiene. diphenylamidoborane-bis(ri’-2-isopropyl-4-phenylinden-1 -yl)zirconium 1,4-diphenyl-1,3-butadiene, diphenylamidoborane-bis(T|’-2"methyl-4-bis(3,5-trifluoromethyl)phenylinden-1 -yOzirconium 1,4-diphenyl-1,3-butadiene, and diphenylamidoborane-bis(Ti’-3-t-butylinden-1-yl)zirconium 1,4-diphenyl-1,3-butadiene. In general the complexes of the current invention can be prepared by first converting the ligands represented in formulas la and 2a to a dianionic salt (where R'* is H) via reaction within a metal amide such as sodium bis(trimethylsilyl)amide or lithium bis(trimethylsilyl)amide. The dianionic ligand derivative is then reacted with a metal complex precursor such as MY’, MY’a. or MY’a (and the corresponding Lev’s base adducts). where Y’ is defined as above. Alternatively, reactions employing the neutral ligand, where R** is hydrogen, in combination with the metal precursors M(NR’2)4 or MR’4 can be employed. (Preparation of the ligands of formula 2a where Y’ and Y’ are each an NR’ group can be readily accomplished by contacting a diboron tatrahydrocarbyloxide compound of the formula ((R’O)2B)2, where R'‘ is C1-10 hydrocarbyl, or two R’ groups together are C2.20 dihydrocarbyl, especially bis(catecholato)diboron with an alkali metal Ci’ dihydrocarbylamide, especially lithium dimethylamide.) All of the foregoing reactions are conducted in an inert solvent such as a hydrocarbon solvent or an etheral solvent in the temperature range of-100 2Cto150 2C. An especially useful metal complex precursor reagent corresponds to the formula 3: defined and Y’ each occurrence is chloride. Employment of this precursor in the reaction with ligands of this invention renders the resulting metal complex in high racemic purity, which is especially useful in the stereospecific polymerization of a-olefins. Alternatively, where R'* in structures of formula 1a and 2a Is a trimethylsilyl group the ligand can be reacted directly with any of the above metal complex precursors of formula 3, employing similar reaction conditions. The recovery of the desired Group 4 transition metal complex is accomplished by separation of the product from any alkali metal or alkaline earth metal salts and devolatilization of the reaction medium. Extraction into a secondary solvent may be employed if desired. Alternatively, if the desired product is an insoluble precipitate, filtratiori or other separation techniques may be employed. Final purification, if required, may be accomplished by recrystallization from an inert solvent, employing low temperatures if needed. The complexes are rendered catalytically active by combination with acitvating cocatalysts or use of activating techniques that are previously known in the art for use with Group 4 metal olefin polymerization complexes. Suitable activating cocatalysts for use herein include polymeric or oligomeric alumoxanes, especially methylalumoxane, triisobutyl aluminum modified methylalumoxane, or isobutylalumoxane; neutral Lewis acids, such as C-1.30 hydrocarbyl substituted Group 13 compounds, especially tri(hydrocarbyl)aluminum- ortri{hydrocarbyl)boron compounds and halogenated (including perhalogenated) derivatives thereof, having from 1 to 10 carbons in each hydrocarbyl or halogenated hydrocarbyl group, more especially perfluorinated tri(aryl)boron compounds, and most especially tris(pentafluoro-phenyl)borane; nonpolymeric, compatible, noncoordinating, ion forming compounds (including the use of such compounds under oxidizing conditions), especially the use of ammonium-, phosphonium-, oxonium-, carbonium-, silylium- or sulfonium- salts of compatible, noncoordinating anions, or fen'ocenium salts of compatible, noncoordinating anions; bulk electrolysis (explained in more detail hereinafter); and combinations of the foregoing activating cocatalysts and techniques. The foregoing activating cocatalysts and activating techniques have Den previously taught with respect to different metal complexes in the following references: EP-A-277.003. US-A-5,153,157, US-A-5.064,802. US-A-5,321,106, US-A-5,721,185, US-A-5,350.723, US-A-5.425,872, US-A-5,625,087, US-A-5,883,204, US-A-5,919,983, US-A-5.783,512, WO 99/15534, and USSN 09/251,664, filed February 17, 1999. Combinations of neutral Lewis acids, especially the combination of a trialkylaluminum compound having from 1 to 4 carbons in each alkyl group and a halogenated tri(hydrocarbyl)boron compound having from 1 to 20 carbons in each hydrocarbyl group, especially tris(pentafluorophenyl)borane, further combinations of such neutral Lewis acid mixtures with a polymeric or oligomeric alumoxane, and combinations of a single neutral Lewis add, especially tris(pentafluorophenyl)borane with a polymeric or oligomeric alumoxane are especially desirable activating cocatalysts. Preferred molar ratios of Group 4 metal complex:tris(pentafluoro-phenylboraneialumoxane are from 1:1:1 to 1:10:30, more preferably from 1:1:1.5 to 1:5:10. Suitable ion forming compounds useful as cocatalysts in one embodiment of the present invention comprise a cation which is a Bronsted acid capable of donating a proton, and a compatible, noncoordinating anion, A'. As used herein, the term "noncoordinating" means an anion or substance which either does not coordinate to the Group 4 metal containing precursor complex and the catalytic derivative derived therefrom, or which is only weakly coordinated to such complexes thereby remaining sufficiently labile to be displaced by a neutral Lewis base. A noncoordinating anion specifically refers to an anion which when functioning as a charge balancing anion in a cationic metal complex does not transfer an anionic substituent or fragment thereof to said cation thereby forming neutral complexes. "Compatible anions" are anions which are not degraded to neutrality when the initially formed complex decomposes and are noninterfering with desired subsequent polymerization or other uses of the complex. Preferred anions are those containing a single coordination complex comprising a charge-bearing metal or metalloid core which anion is capable of balancing the charge of the active catalyst species (the metal cation) which may be formed when the two components are combined. Also, said anion should be sufficiently labile to be displaced by olefinic, dioiefinic and acetylenically unsaturated compounds or other neutral Lewis bases such as ethers or nitriles. Suitable metals include, but are not limited to. aluminum, gold and platinum. Suitable metalloids Include, but are not limited to, boron, phosphorus, and silicon. Compounds containing anions which comprise coordination complexes containing a single metal or metalloid atom are, of course, well known and many, particularly such compounds containing a single boron atom in the anion portion, are available commercially. Preferably such cocatalysts may be represented by the following general formula: wherein: L* is a neutral Lewis base; (L*-H)"+" is a conjugate Bronsted acid of L*; A’ is a noncoordinating, compatible anion having a charge of d-, and d is an integer from 1 to 3. More preferably A* corresponds to the formula: [M*Q4y; wherein: M' is boron or aluminum in the +3 formal oxidation state; and Q independently each occurrence is selected from hydride, dialkylamido, halide, hydrocari’yl, hydrocarbyloxide, halo-substituted hydrocartDyl, halo-substituted hydrocarbyloxy, and halo- substituted silylhydrocartDyl radicals (including pert’alogenated hydrccarbyl- pertialogenated hydrocarbyloxy- and pertialogenated silylhydrocarbyl radicals), said Q having up to 20 carbons with the proviso that in not more than one occurrence is Q halide. Examples of suitable hydrocarbyloxide Q groups are disclosed in U. S. Patent 5,296,433, In a more preferred embodiment, d is one, that is, the counter ion has a single negative charge and is A". Activating cocatalysts comprising boron which are particularity useful in the preparation of catalysts of this invention may be represented by the following general formula: wherein: L* is as previously defined; B is boron in a formal oxidation state of 3; and Q is a hydrocarbyl-, hydrocartDyloxy-, fluorohydrocartDyl-, fluorohydrocarbyloxy-, hydroxyfluorohydrocartDyl-, dihydrocartDylaluminumoxyfluorohydrocartDyl-, or fluorinated silylhydrocartDyl- group of up to 20 nonhydrogen atoms, with the proviso that in not more than one occasion is Q hydrocartDyl. Preferred Lewis base salts are ammonium salts, more preferably tnalkylammonium salts containing one or more C-|2-40 ‘'M groups. Most preferably, Q is each occurrence a fluorinated aryl group, especially, a pentafluorophenyl group. Illustrative, but not limiting, examples of boron compounds which may be used as an activating cocatalyst in the preparation of the improved catalysts of this invention are tri-substituted ammonium salts such as: trimethylammonium tetrakis(pentafluorophenyl) borate, triethylammonium tetrakis(pentafluorophenyl) borate, tripropylammonium tetrakis(pentafluorophenyl) borate, tri(n-butyl)ammonium tetrakis(pentafluorophenyl) borate, tri(sec-butyl)ammonium tetrakis(pentafluorophenyl) borate, N,N-dimethylanilinium tetrakis(pentafluorophenyl) borate, N,N-dimethylanilinium n-butyltris(pentafluorophenyl) borate, N,N-dimethylanilinium benzyltris(pentafluorophenyl) borate, N,N-dimethylanilinium tetrakis(4-(t-butyldimethylsilyl)-2, 3, 5, 6-tetrafluorophenyl) borate, N,N-dimethylanilinium tetrakis(4-(triisoprDpylsilyl}-2,3,5,6-tetrafluorophenyl) borate, N,N-dimethylaniliniumpentafluorophenoxytris(pentafluorophenyl) borate, N,N"diethylanilinium tetrakis(pentafluorophenyl) borate. N,N-dimethyl-2,4,6-trimethylaniliniumtetrakis(pentafluorophenyl) borate, dimethyltetradecylammonium tetrakis(pentafluorophenyl) borate, dimethylhexadecyiammonium tetrakis(pentafiuorophenyl) borate, dimethyloctadecylammonium tetrakis(pentafluorophenyl) borate, methylditetradecylammonium tetrakis(pentafluorophenyl) borate, methylditetradecylammonium(hydroxyphenyl)tris(pentafluorophenyl) borate, methylditetradecylammonium (diethylaluminoxyphenyl)tris(pentafluorophenyl) borate, methyldihexadecylammonium tetrakis(pentafluorophenyl) borate, methyldihexadecylammonium(hydroxyphenyl)tris(pentafluorophenyl) borate, methyldihexadecylammonium (diethylaluminoxyphenyl)tris(pentafluorophenyl) borate, methyldioctadecylammonium tetrakls(pentafluorophenyi) borate, methyldioctadecylammonium{hydroxyphenyl)tris(pentafluorophenyl) borate, methyldioctadecylammonium (diethylaluminoxyphenyl)tris(pentafluorophenyl) borate, mixtures of the foregoing, dialkyi ammonium salts such as: kii-(i-propyl)ammonium tetrakis(pentafluorDphenyl) borate, methyloctadecyiammonium tetrakis(pentafluorophenyl) borate, methyloctadodecylammonium tetrakis(pentafiuorophenyl) borate, and dioctadecylammonium tetrakis(pentafluorophenyl) borate; tri-substituted phosphonium salts such as: triphenylphosphonium tetrakis(pentafluorophenyl) borate, methyldioctadecylphosphonium tetrakis(pentafluorophenyl) borate, and tri(2,6-dimethytphenyl)phosphonium tetrakis(pentafluorophenyl) borate; di-substituted oxonium salts such as: diphenyloxonium tetrakls(pentafluorophenyl) borate, di(o-tolyl)oxonium tetrakis(pentafluorophenyl) borate, and di(octadecyl)oxonium tetrakis(pentafluorophenyl) borate; di-substituted sulfonium salts such as: di(o-tolyl)sutfonium tetrakis(pentafluorophenyl) borate, and methylcotadecylsulfonium tetrakis(pentafluorophenyl) borate. Preferred (L*-Hr cations are methyldioctadecylammonium and dimethyloctadecylammonium. Another suitable ion forming, activating cocataiyst comprises a salt of a cationic oxidizing agent and a noncoordinating, compatible anion represented by the formula: wherein: Ox’ is a cationic oxidizing agent having a charge of e+; e is an integer from 1 to 3; and A* and d are as previously defined. Examples of cationic oxidizing agents include , hydrocartDyl-substituted ferrocenium, Ag*' or Pb*’. Preferred embodiments of A’ are those anions previously defined with respect to the Bronsted acid containing activating cocatalysts, especially tetrakis(pentafluorophenyl)borate. Another suitable ion fuming, activating cocataiyst comprises a compound which is a salt of a carbenium ion and a noncoordinating, compatible anion represented by the formula: A" is as previously defined. A preferred carbenium ion is the trityl cation, that is triphenyimethyiium. A further suitable ion forming, activating cocatalyst comprises a compound which is a salt of a siiylium ion and a noncoordinating, compatible anion represented by the formula: wherein: R is Ci.10 hydrocarbyl, and X', q and A' are as previously defined. Preferred siiylium salt activating cocatalysts are trimethylsilylium tetrakispentafluorophenylborate, triethylsilylium tetrakispentafluorophenylborate and ether substituted adducts thereof. Siiylium salts have been previously genericaliy disclosed in J. Chem Soc. Chem. Comm.. 1993, 383-384, as well as Lambert, J. B., et al., Organometallics. 1994,13, 2430-2443. The use of the above siiylium salts as activating cocatalysts for addition polymerization catalysts is disclosed in US serial number 304,314, filed September 12,1994, published in equivalent form as WO96/08519 on March 21,1996. Certain complexes of alcohols, mercaptans, silanols, and oximes with tris(pentafluorophenyl)borane are also effective catalyst activators and may be used according to the present invention. Such cocatalysts are disclosed in USP 5,296,433- Another class of suitable catalyst activators are expanded anionic compounds wherein: A’ is a cation of charge +a7} is an anion group of from 1 to 50, preferably 1 to 30 atoms, not counting hydrogen atoms, further containing two or more Lewis base sites; J’ independently each occurrence is a Lewis acid coordinated to at least one Lewis base site of Z\ and optionally two or more such J’ groups may be joined together in a moiety having multiple Lewis acidic functionality, j’ is a number from 2 to 12 and a\ b\ c\ and d’ are integers from 1 to 3, with the proviso that a’ x b’ is equal to c' X dThe foregoing cocatalysts (illustrated by those having imidazolide, substituted imidazolide, imidazolinide, substituted imidazolinide, benzimidazolide, or substituted benzimidazolide anions) may be depicted schematically as follows: wherein; A’"‘ is a monovalent cation as previously defined, and preferably is a trihydrocarbyl ammonium cation, containing one or two Cio-4o alkyl groups, especially the methylbis(tetradecyl)ammonium- or methylbis(octadecyl)ammonium" cation, R®, independently each occurrence, is hydrogen or a halo, hydrocarbyl, halocarbyl, halohydrocarbyl, silylhydrocarbyl, or silyl, (including mono-, di- and tri(hydrocarbyl)silyl) group of up to 30 atoms not counting hydrogen, preferably C1.20 alkyl, and J’ is tris(pentafluorophenyl)borane ortris(pentafluorophenyl)aluminane. Examples of ties catalyst activators include the trihydrocarbylammonium-, especially, methylbis(tetradecyl)ammonio- or methylbis(octadecyl)ammonium- salts of: bis(tris(pentafiuorophenyl)borane)imidazoiide, bis(tris(pentafluorophenyl)borane)-2-undecylimidazolide, bis(tris(pentafluorophenyl)borane)-2-heptadecyiimidazolide, bis(tris(pentafluorophenyl)borane)-4,5-bis(undecyl)imidazolide, bis(tris(pentafluorophenyl)borane)-4,5-bis(heptadecyl)imidazolide, bis(tris(pentafluorophenyl)borane)imidazolinide, bis(tris(pentafluorophenyl)borane)-2-undecylimidazolinide, bis(tris(pentafluorophenyl)borane)-2-heptadecylimidazolinide, bis(tris(pentafluorophenyl)borane)-4,5-bis(undecyl)imida2olinide, bis(tris(pentafluorophenyl)borane)-4,5-bis(heptadecyl)imidazolinide, bis(tris(pentafluorophenyl)borane)-5,6-dimethylben2imidazolide, bis(tris(pentafluorophenyl)borane)-5,6-bis(undecyl)ben2imidazolide, bis{tris{pentaftuorophenyl)alumane)imidazolide, bis(tris(pentafluorophenyi)alumane)-2-undecylimidazolide, bis(tris(pentafluorophenyl)alumane)-2-heptadecylimidazotide, bis(tris(pentafiuorophenyl)alumane)-4,5-bis(undecyl)imida2olide, bis(tris(pentafluorophenyl)alumane)-4,5-bis(heptadecyl)imidazolide, bis(tris(pentafluorophenyl)alumane)imidazolinide, bis(tris(pentafluorophenyl)alumane)-2-undecylimidazolinide, bis(tris(pentafluorophenyl)alumane)-2-heptadecylimidazolinide, bis(tris(pentafluorophenyl)alumane)-4,5-bis(undecyl)imidazolinide. bis(tris(pentafluorophenyl)alumane)-4,5-bis(heptadecyl)imidazolinide, bis(tris(pentafluorophenyl)alumane)-5,6-dimethylben2imidazolide, and bis(tris(pentafluorophenyl)alumane)-5,6"bis{undecyl)benzimidazolide. The technique of bulk electrolysis involves the electrochemical oxidation of the metal complex under electrolysis conditions in the presence of a supporting electrolyte comprising a noncoordinating, inert anion. In the technique, solvents, supporting electrolytes and electrolytic potentials for the electrolysis are used such that electrolysis byproducts that would render the metal complex catalytically inactive are not substantially formed during the reaction. More particularly, suitable solvents are materials that are: liquids under the conditions of the electrolysis (generally temperatures from 0 to lOCC), capable of dissolving the supporting electrolyte, and inert. Inert solvents" are those that are not reduced or oxidized under the reaction conditions employed for the electrolysis. It is generally possible in view of the desired electrolysis reaction to choose a solvent and a supporting electrolyte that are unaffected by the electrical potential used for the desired electrolysis. Preferred solvents include difluorobenzene (all isomers), dimethoxyethane (DME), and mixtures thereof. The electrolysis may be conducted in a standard electrolytic cell containing an anode and cathode (also referred to as the working electrode and counter electrode respectively). Suitable materials of construction for the cell are glass, plastic, ceramic and glass coated metal. The electrodes are prepared from inert conductive materials, by which are meant conductive materials that are unaffected by the reaction mixture or reaction conditions. Platinum or palladium are preferred inert conductive materials. Normally an ion permeable membrane such as a fine glass frit separates the cell into separate compartments, the wording electrode compartment and counter electrode compartment. The working electrode is immersed in a reaction medium comprising the metal complex to be activated, solvent, supporting electrolyte, and any other materials desired for moderating the electrolysis or stabilizing the resulting complex. The counter electrode is immersed in a mixture of the solvent and supporting electrolyte. The desired voltage may be determined by theoretical calculations or experimentally by sweeping the cell using a reference electrode such as a silver electrode immersed in the cell electrolyte. The background cell cun’ent, the current draw in the absence of the desired electrolysis, is also determined. The electrolysis is completed when the consent drops from the desired level to the background level. In this manner, complete conversion of the initial metal complex can be easily detected. Suitable supporting electrolytes are salts comprising a cation and a compatible, noncoordinating anion, A-. Preferred supporting electrolytes are salts corresponding to the formula G’A*; wherein: G* is a cation which is nonreactive towards the starting and resulting complex, and A' is as previously defined. Examples of cations, G*, include tetrahydrocarbyl substituted ammonium or phosphonium cations having up to 40 nonhydrogen atoms. Preferred cations are the tetra(n-butylammonium)- and tetraethylammonium- cations. During activation of the complexes of the present invention by bulk electrolysis the cation of the supporting electrolyte passes to the counter electrode and A-migrates to the working electrode to become the anion of the resulting oxidized product. Either the solvent or the cation of the supporting electrolyte is reduced at the counter electrode in equal molar quantity with the amount of oxidized metal complex formed at the working electrode. Preferred supporting electrolytes are tetrahydrocarbylammonium salts of tetrakis(perfluoroafyl) borates having from 1 to 10 carbons in each hydrocarbyl or perfluoroaryl group, especially tetra(n-butylammonium)tetrakis(pentafluorophenyl) borate. A further recently discovered electrochemical technique for generation of activating cocatalysts is the electrolysis of a disilane compound in tithe presence of a source of a noncoordinating compatible anion. This technique is more fully disclosed and claimed in the previously mentioned United States Patent application serial number 304,314, published in equivalent form as WO96/08519. The foregoing electrochemical activating technique and activating cocatalysts may also be used in combination. An especially preferred combination is a mixture of a tri(hydrocartDyl)aluminum ortri(hydrocartDyl)borane compound having from 1 to 4 cations in each hydrocarbyl group with an oligomeric or polymeric alumoxane compound. The molar ratio of catalyst/cocatalyst employed preferably ranges from 1:10,000 to 100:1. more preferably from 1:5000 to 10:1, most preferably from 1:1000 to 1:1. Alumoxane, when used by itself as an activating cocatalyst. is employed in large quantity, generally at least 100 times the quantity of metal complex on a molar basis. Tris(pentafiuorophenyl)borane, where used as an activating cocatalyst is employed in a molar ratio to the metal complex of foci 0.5:1 to 10:1, more preferably from 1:1 to 6:1 most preferably from 1:1 to 5:1. The remaining activating cocataiysts are generally employed in approximately equimolar quantity with the metal complex. The catalysts, whether or not supported in any of the foregoing methods, may be used to polymerize ethylenically and/or acetylenically unsaturated monomers having from 2 to 100,000 carbon atoms either alone or in combination. Preferred monomers include the C2-20 a-olefins especially ethylene, propylene, isobutylene, 1- butene, 1-pentene, 1-hexene, 3-methyl-1-pentene, 4-methyl-1-pentene, 1-octene, 1-decene, long chain macromolecular a-olefins, and mixtures thereof. Other preferred monomers include styrene. C1-4 alkyl substituted styrene, tetrafluoroethylene, vinylbenzocyclobutane, ethylidenenorbomene, 1,4-hexadiene, 1.7-octadiene, vinylcyclohexane, 4-vinylcyclohexene, divinylbenzene, and mixtures thereof with ethylene. Long chain macromolecular a-olefins are vinyl terminated polymeric remnants formed in situ during continuous solution polymerization reactions. Under suitable processing conditions such long chain macromolecular units are readily polymerized into the polymer product along with ethylene and other short chain olefin monomers to give small quantities of long chain branching in the resulting polymer. Preferred monomers include a combination of ethylene and one or more comonomers selected from monovinyl aromatic monomers, 4-vinyicyclohexene, vinylcyclohexane, norbomadiene, ethylidene-nort3omene, C3-10 aliphatic a-olefins (especially propylene, isobutylene, 1-butene, 1-hexene, 3-methyl-1-pentene, 4-methyI-1-pentene, and 1-octene), and 04,40 dienes. Most preferred monomers are mixtures of ethylene and styrene; mixtures of ethylene, propylene and styrene; mixtures of ethylene, styrene and a nonconjugated diene, especially ethylidenenoriDomene or 1,4-hexadiene, and mixtures of ethylene, propylene and a nonconjugated diene, especially ethylidenenorbomene or 1,4-hexadiene. In general, the polymerization may be accomplished at conditions well known in the prior art for Ziegler-Natta or Kaminski-Sinn type polymerization reactions, that is, temperatures from 0-250**C, preferably 30 to 200'O and pressures from atmospheric to 10,000 atmospheres. Suspension, solution, slurry, gas phase, solid state powder polymerization or other process condition may be employed if desired. A support, especially silica, alumina, or a polymer (especially poly(tetrafluoroethylene) or a poiyolefin) may be employed, and desirably is employed when the catalysts are used in a gas phase polymerization process. The support is preferably employed in an amount to provide a weight ratio of catalyst (based on metal):support from 1:100,000 to 1:10, more preferably from 1:50,000 to 1:20, and most preferably from 1:10,000 to 1:30, In most polymerization reactions the molar ratio of catalyst:polymerizable compounds employed is from 10"‘‘:1 to 10'‘1, more preferably from 10'®:1 to 10"‘:1. Suitable solvents use for solution polymerization are inert liquids. Examples include straight and branched-chain hydrocartDons such as isobutane, butane, pentane, hexane, heptane, octane, and mixtures thereof; cyclic and alicyclic hydrocarbons such as cyclohexane, cycloheptane, methylcyclohexane, methylcycloheptane, and mixtures thereof; perfluorinated hydrocarbons such as perfluorinated C4.-10 alkanes, and alkyl-substituted aromatic compounds such as benzene, toluene, xylene, and ethylbenzene. Suitable solvents also include liquid olefins which may act as monomers or comonomers. The catalysts may be utilized in combination with at least one additional homogeneous or heterogeneous polymerization catalyst in the same reactor or in separate reactors connected in series or in parallel to prepare polymer blends having desirable properties. An example of such a process is disclosed in WO 94/00500, equivalent to U. S. Serial Number 07/904,770. as well as U. S. Serial Number 08/10958, filed January 29,1993. Utilizing the present catalysts, a-olefin homopolymers and copolymers having densities from 0,85 g/cm’ to 0.96 g/cm’ and melt flow rates from 0.001 to 1000.0 dg/min are readily attained in a highly efficient process. The catalysts of the present invention are particularity advantageous for the production of ethylene homopolymers and ethylene/a-olefin copolymers having high levels of long chain branching. The use of the catalysts of the present invention in continuous polymerization processes, especially continuous, solution polymerization processes, allows tore elevated reactor temperatures which favor the foliation of vinyl terminated polymer chains that may be incorporated into a growing polymer, thereby giving a long chain branch. The use of the present catalyst compositions advantageously allows for the economical production of ethylene/a-olefin copolymers having processability similar to high pressure, free radical produced low density polyethylene. The present catalyst compositions may be advantageously employed to prepare olefin polymers having improved processing properties by polymerizing ethylene alone or ethylene/a-olefin mixtures with low levels of a "H" branch inducing diene. such as norbomadiene, 1,7-octadiene, or 1,9-decadiene. The unique combination of elevated reactor temperatures, high molecular weight (or low melt indices) at high reactor temperatures and high comonomer reactivity advantageously allows for the economical production of polymers having excellent physical properties and processability. Preferably such polymers comprise ethylene, a €3,20 and a "H""branching comonomer. Preferably, such polymers are produced in a solution process, most preferably a continuous solution process. The catalyst composition may be prepared as a homogeneous catalyst by addition of the requisite components to a solvent or diluent in which polymerization will be conducted. The catalyst composition may also be prepared and employed as a heterogeneous catalyst by adsorbing, depositing or chemically attaching the requisite components on an inert inorganic or organic particulates solid. Examples of such solids include, silica, silica gel, alumina, clays, expanded clays (aerogels), aluminosilicates, trialkylaluminum compounds, and organic or inorganic polymeric materials, especially polyolefins. In an prefen-ed embodiment, a heterogeneous catalyst is prepared by reacting an inorganic compound, preferably a tri(Ci’ alkyl aluminum compound, with an activating cocatalyst. especially an ammonium salt of a hydroxyaryl(trispentafluoro-phenyl)borate, such as an ammonium salt of (4-hydroxy-3,5-ditertiarybutylphenyl)tris-(pentafluorophenyl)borateor(4-hydroxyphenyl)-tris(pentafluorophenyl)borate. This activating cocatalyst is deposited onto the support by coprecipitating, imbibing, spraying, or similar technique, and thereafter removing any solvent or diluent. The metal complex is added to the support, also by adsorb depositing or chemically attaching the same to the support, either subsequently, simultaneously or prior to addition of the activating cocatalyst. When prepared in heterogeneous or supported form, the catalyst composition is employed in a slurry or gas phase polymerization. As a practical limitation, slurry polymerization takes place in liquid diluents in which the polymer product is substantially insoluble. Preferably, the diluent for slurry polymerization is one or more hydrocarbons with less than 5 cardoon atoms. If desired, saturated hydrocardon such as ethane, propane or butane may be used in whole or part as the diluent. Likewise the a-olefin monomer or a mixture of different a-olefin monomers may be used in whole or part as the diluent. Most preferably at least a major part of the diluent comprises the a-olefin monomer or monomers to be polymerized. At all times, the individual ingredients as well as the recovered catalyst components must be protected from oxygen and moisture. Therefore, the catalyst components and catalysts must be prepared and recovered in an oxygen and moisture free atmosphere. Preferably, therefore, the reactions are performed in the presence of an dry, inert gas such as, for example, nitrogen. The polymerization may be carried out as a batch wise or a continuous polymerization process A continuous process is prefemed, in which event catalyst, ethylene, comonomer, and optionally solvent are continuously supplied to the reaction zone and polymer product continuously removed therefrom. Without limiting in any way the scope of the invention, one means for carrying out such a polymerization process is as follows: In a stirred-tank reactor, the monomers to be polymerized are introduced continuously together with solvent and an optional chain transfer agent. The reactor contains a liquid phase composed substantially of monomers together with any solvent or additional diluent and dissolved polymer. If desired, a small amount of a "H"-branch inducing diene such as norbomadiene, 1,7-octadiene or 1,9-decadiene may also be added. Catalyst and cocatalyst are continuously introduced in the reactor liquid phase. The reactor temperature and pressure may be controlled by adjusting the solvent/monomer ratio, the catalyst addition rate, as well as by cooling or heating coils, jackets or both. The polymerization rate is controlled by the rate of catalyst addition. The ethylene content of the polymer product is determined by the ratio of ethylene to comonomer in the reactor, which is controlled by manipulating the respective feed rates of these components to the reactor. The polymer product molecular weight is controlled, optionally, by controlling other polymerization variables such as free temperature, monomer concentration, or by the previously mention chain transfer agent, such as a stream of hydrogen introduced to the reactor, as is well known in the art. The reactor effluent is contacted with a catalyst kill agent such as water. The polymer solution is optionally heated, and the polymer product is recovered by flashing off gaseous monomers as well as residual solvent or diluent at reduced pressure, and, if necessary, conducting further devolatilization in equipment such as a devolatilizing extruder. In a continuous process the mean residence time of the catalyst and polymer in the reactor generally is from about 5 minutes to 8 hours, and preferably from 10 minutes to 6 hours. By using a catalyst that incorporates large amounts of hindered monovinyl monomer, hindered monovinyl homopolymer formed from residual quantities of the monomer are substantially reduced Ethylene homopolymers and ethylene/a-olefin copolymers are particularity suited for preparation according to the invention. Generally such polymers have densities from 0.88 to 0.96 g/mi. Typically the molar ratio of a-olefin comonomer to ethylene used in the polymerization may be varied in order to adjust the density of tie resulting polymer. When producing materials with a density range of from 0,91 to 0.93 the comonomer to monomer ratio is less than 0,2. preferably less than 0.05. even more preferably less than 0.02, and may even be less than 0.01. In the above polymerization process hydrogen has been found to effectively control the molecular weight of the resulting polymer. Typically, the molar ratio of hydrogen to monomer is less than about 0.5, preferably less than 0.2. more preferably less than 0.05, even more preferably less than 0,02 and may even be less than 0,01. EXAMPLES The skilled artisan will appreciate that the invention disclosed herein may be practiced in the absence of any component which has not been specifically disclosed. The following examples are provided as further illustration of the invention and are not to be construed as limiting. Unless stated to the contrary all parts and percentages are expressed on a weight basis. The term "overnight", if used, refers to a time of approximately 16-18 hours, the tem "room temperature", refers to a temperature of about 20-25 ""C, and the term "mixed alkanes" refers to a commercially obtained mixture of Ce-a aliphatic hydrocarbons available under the trade designation Isopar E®. from Exxon Chemicals Inc. ‘H (300 MHz) and ‘‘C NMR (75 MHz) spectra were recorded on a Varian XL-300 spectrometer, ‘H and ‘‘C NMR spectra are referenced to the residual solvent peaks and are reported in ppm relative to tetramethylsilane. All J values are given in Hz. Tetrahydrofuran (THF). diethytether, toluene, and hexane were used following passage through double columns charged with activated alumina and a purifying catalyst (Q-5® available from Engiehardt Chemicals Inc.) The compounds BCb-SMeg, BBr3-SMe2, B(NMe2)3, n-BuLi were all used as purchased from Aldrich. The compound TiCl3(THF)3 was prepared as described in the literature. All syntheses were performed under dry nitrogen or argon atmospheres using a combination of glove box and high vacuum techniques. Example 1 Dichloro-[1.2-Bls(2.6-diisopropylanilide)-1,2-bis(dimethylamido)diborane] titanium 1A) Preparation of Chlorobis(climethylamiclo)borane, (modification of Chavant, P. Y.; Vaultier, M, J. Organomel Chem. 1993, 455, 37-46) BCl3-SMe2 (62.000 g, 345.78 mmol) and B(NMe2)3 (98.921 g, 691.56 mmole) were stirred together at room temperature overnight under a nitrogen bubbler. The mixture was then heated to reflux for one hour to drive off any residual SMea. Allowing the pale yellow liquid to stir to room temperature resulted in the isolation of the desired product cleanly (44.979 g, 99.9 percent yield). 'HNMR(C6D6): 5 2.49 (S. 12 H). 'C NMR (CeDe): 5 39.86. 1B) Preparation of Tetrakis(dlmethylamido)diborane (modification of Noth, H; Meister, W. Z Naturforsch., Tail 1962, 17, 714) Chiorobis(dimethylamido)borane (30.000 g. 223.19 mmol) was refluxed in hexane (200 ml) as Na/K alloy [Na (1.539 g . 66.96 mmol)/8.726 g K (8.726 g, 223.19 mmol)] was added dropwise to the solution. After the first several drops the reaction initiated as evidenced by a sudden increase in the reflux. The heat was then turned off and the alloy added slowly so as to maintain a reflux. After the addition was complete, the reaction mixture was heated to reflux for an additional hour and then stirred at room temperature for three hours. The mixture was then filtered through a pad of diatomaceous earth and the volatiles removed resulting in the isolation of a yellow liquid. Fractional vacuum distillation resulted in the isolation of the desired compound as a pale yellow liquid (7.756 g, 35.1 percent yield). 'HNMR(C6D6): 5 2.74 (s, 24 H). '‘C NMR (CeDe): 6 41.34. 1C) Preparation of Bis(dJmethylamido)diborondichlorlde (modification of Noth, H; Meister, W. Z Naturforsch,, re//01962, 17,714) Tetrakis(dimethylamido)diborane (7.76 g, 39.29 mmol) was stinted in diethylether (100 ml) at -78 ‘'C as HCI (157 mmol, 157 ml of 1.0 M solution in diethylether) was added dropwise. This mixture was then allowed to stir for six hours solid and the mixture allowed to stir for an additional 30 minutes. After the reaction period the volatiles were removed and the residue extracted and filtered using hexane. Concentration of the hexane and cooling to -10 °C overnight resulted in the foliation of orange X-ray quality crystals (0.156 g, 21.3 percent yield). 'H NMR (CeDe): 5 1.23 (d, 'JHH= 6.6 Hz, 6 H), 1.45 (d, ‘JHH= 6.6 Hz, 6 H), 2.17 (s, 6 H), 2.76 (s, 6 H). 3.53 (septet, ‘JHH= 6.6 Hz, 4 H), 7.11 (s, 6 H) Example 2 Dichloro [1,2-Bis(2,6-diisopropylanilide)-1,2-bis(dimethylamido)diborane] titanium (alternated preparation) 2A) Preparation of Chlorobis(dimethylamido)borane. Biases (62.000 g, 345.78 mmol) and B(NMe2)3 (98.921 g, 691.56 mmol) were stirred together at room temperature overnight under a nitrogen bubbler. The mixture was then heated to reflux for one hour to drive off any residual SMea, Allowing the pale yellow liquid to stir to room temperature resulted in the isolation of the desired product (139.436 g, 93.3 percent yield), 'H NMR (CeDe): 5 2.49 (s, 12 H). '‘C NMR (CeDe): 5 39,86. 28) Preparation of Tetrakis(dimethylamido)diborane via CIB(NMe)2. Chlorobis(dimethylamido)borane (30.000 g. 223.19 mmol) was refluxed in hexane (200 ml) as Na/K alloy [Na (1,539 g . 66.96 mmol)/8.726 g K (8.726 g, 223.19 mmol)] was added dropwise to the solution. After the first several drops the reaction initiated as evidenced by a sudden increase in the reflux. The heat was then turned off and the alloy added slowly so as to maintain a reflux. After the addition was complete, the reaction mixture was heated to reflux for an additional hour and then stirred at room temperature for three hours. The mixture was then filtered through a diatomaceous earth pad and the volatile components were removed resulting in the isolation of a yellow liquid. Fractional vacuum distillation resulted in the isolation of the desired compound as a pale yellow liquid (7,756 g, 35.1 percent yield). 'H NMR (CeDe): 6 2.73 (s, 24 H). '‘C NMR (CeDe): 5 41.37. 2C) Preparation of Tetrakis(dimethylamido)diborane via Bis(catecholato)diboron. Lithium dimethylamide (10.70 g, 210,0 mmol) was added slowly as a solid to a solution of bis(catecholato)diboron (10.00 g, 42.00 mmol) in diethylether (200 ml) at -20**C. This mixture was then allowed to stir for an additional 40 hours at room temperature. After the reaction period the ether was removed under vacuum and the residue extracted and filtered using hexane. Removal of the hexane resulted in the isolation of a yellow oil. Fractional vacuum distillation resulted in the isolation of the desired compound as a pale yellow liquid (5.493 g, 66.0 percent yield). 2D) Preparation of Bis(dimethylamido)diborondichloride. Tetrakis(dimethylamido)diborane (7.756 g, 39.19 mmol) was stirred in diethylether (100 ml) at -78'*C as HCI (156.75 mmol, 156.75 ml of 1.0 M solution in diethylether) was added dropwise. This mixture was then allowed to stir for six hours at room temperature. After the reaction period the volatile components were removed and the residue extracted and filtered using hexane. Removal of the hexane resulted in the isolation of a yellow oil. Fractional vacuum distillation resulted in the isolation of the desired compound as a pale yellow liquid (4.722 g, 66.7 percent yield). 'H NMR (CeDe): 5 2.40 (s, 6 H), 2.50 (s, 6 H). '‘C NMR (CeDe): 6 37.62. 41.78. 2E) Preparation of 2,6-Diisopropylaniiine, lithium salt. />BuLi (56.40 mmol, 35.25 ml of 1.6 M solution in hexane) was added dropwise to a solution of 2,6-diisopropylaniline (10.00 g, 56.40 mmol) in hexane (100 ml). This mixture was allowed to stir for 3 hours during which time a white precipitate formed. After the reaction period the mixture was filtered and the white salt washed with hexane and dried under vacuum and used without further purification or analysis (9.988 g, 96,7 percent yield). 2F) Preparation of 1,2"Bis(2,6-diisopropylanilide)-1,2-bis(dimethylamido)diborane. Bis(dimethylamido)diborondichloride (2.350 g, 13,00 mmol) in diethylether (10 ml) was added dropwise to a solution of 2,6-diisopropylaniline, lithium salt (4.765 g, 26.01 mmol) in diethylether (50 ml) at O'‘C. This mixture was then allowed to stir overnight at room temperature. After the reaction period the volatiles were removed and the residue was extracted and filtered using hexane. Removal of the hexane resulted in the isolation of a the desired product as a white solid (5.322 g, 88.9 percent yield). 'H NMR (toluene-de): 5 0.9-1.4 (br m, 24 H), 2.3 (s, 6 H). 2.8 (s, 6 H), 3.7 (s. 2 H), 7.0 (br s. 6 H). '‘C NMR (toluene-de): 5 22.51, 24.03 (br). 28.17. 36.82,42.67.123.19. 124.78, 140.71.145.02 (br). MS(El): /n/z 460.4025 (M-H)\ calcd. (M-H)* 460.4026. 2G) Preparation of 1,2-Bis(2,6"diisopropylaniride)-1,2-bis(dimethylamino)diborane. dilithium salt. 1.2-Bis(2,6-diisopropylanilide)-1,2-bis(dimethylamino)diborane (1.820 g, 3.950 mmol) was stirred in hexane (75 ml) as n-Buy (7.91 mmol, 4.94 ml of 1.6 M solution in hexane) was added dropwise. This mixture was then allowed to stir overnight. After the reaction period the mixture was filtered and the salt washed well with hexane and dried under vacuum resulting in the isolation of the desired product as a white powder (1.6878 g, 90.4 percent yieldV 'H NMR (THF-ds): 6 1.04 (d, 'JHH= 6.9 Hz, 6 H), 1.18 (d, 'JHH= 6.9 Hz, 6 H), 2.45 (s, 12 H), 3.66 (septet. ‘JHH= 6.9 Hz, 4 H), 6.29 (t, ‘JHH= 7.5 Hz, 2 H). 6.73 (d, ‘JHH= 7.5 Hz, 4 H). ‘‘C NMR (THF-ds): 5 24.88, 25.34, 28.00, 40.91, 114.40, 121,95, 137,21, 158.76. 2H) Preparation of Dichloro-[1,2-Bis(2,6-diisopropylanilide)-1,2- bis(dimethylamido)diboranepanium. 1,2-Bis(2,6-diisopropylanilide)-1,2-bis(dimethylamido)diborane, dilithium salt (0.600 g, 1.27 mmol) in THF (20 ml) was added dropwise to a slurry of TiCl3(THF)3 (0.471 g, 1.27 mmol) in THF (50 ml) at 0**C. This mixture was then allowed to stir at room temperature for 45 minutes. Pica (0.177 g, 0.640 mmol) was then added as a solid and the mixture allowed to stir for an additional 30 minutes. After the reaction period the volatile components were removed and the residue was extracted and filtered using hexane. Concentration of the hexane fractions and cooling to -10**C overnight resulted In the formation of orange X-ray quality crystals (0.156 g, 21,3 percent yield). The ORTEP crystal structure (not necessarily to scale) based on X-ray analysis is found in Rgure 1. ‘H NMR (toluene-ds): 5 1.23 (d, VHH= 6.6 Hz, 6 H), 1.45 (d, VHH== 6.6 Hz, 6 H), 2.17 (s, 6 H), 2.76 (s, 6 H), 3,53 (septet, 'JHH= 6.6 Hz. 4 H), 7,11 (s. 6 H). '‘C NMR (toluene-ds): 5 24.94. 24.67,29.48, 39,33. 42.93.124.08 (br), 17.23, 150.64. MS(EI): m/z 578.2789 (M)*. calcd. (M)* 578.2781. Anal. Calcd. For C28H46B2N2TiCl2: C, 58,07; H. 8.01; N. 9,67. Found: C. 8.28; H, 8.20; N, 9.42. Example 3 Dimethyl [1,2-Bis(2,6-diisopropylanilide)-1.2-bis(dimethylamido)diborane] titanium Dichioro-[1,2-Bis(2,6-diisopropylanilide)-1,2-bis(dimethylamldo)diborane] titanium (Example 2) (0.272 g, 0.470 mmol) was stun-ed In diethylether (40 ml) as Member (0.940 mmol, 0.313 ml of 3.0 M solution in diethylether) was added dropwise. This mixture was allowed to stir for one hour. After the reaction period the volatiles were removed and the residue extracted and filtered using hexane. Removal of the hexane resulted in the isolation of the desired product as a dark yellow oil (0.209 g, 82,5 percent yield), 'H NMR (CeDe): 5 1.05 (s. 6 H). 1.21 (d. VHH = 6.9 Hz. 16 H). 1.32 (d. VHH = 6.3 Hz. 16 H). 2.19 (s. 6 H). 2.69 (s. 6 H). 3,58 (br. 2 H). 7.0-7,2 (m, 6 H). ""C NMR (Cede): 5 24.06, 24.83. 29,31. 39.58. 42.93. 57.38.123.97, 125.18. 139.5 (br). 149.45. Example 4 Dibenzyl [1,2-Bis(2,6-diisopropylanilide)-1,2-bis(dimethylamido)diborane] zirconium Zirconium tetrachloride (0.100 g, 0.440 mmol) and zirconium tetrabenzyl (0.192 g, 0.440 mmol) were stirred together in diethylether (30 ml) for 1 hour. 1,2-Bis(2,6"diisopropylanilide)-1,2-bis(dimethylamido)diborane, dilithium salt (Example 2G) (0.400 g, 0.842 mmol) in diethylether (30 ml) was then added dropwise and the mixture allowed to stir for 3 hours. After the reaction period the volatiles were removed under vacuum and the residue extracted and filtered using hexane. The filtrate was then concentrated and cooled to -10*’C overnight during which time a white powder precipitated. The mixture was again filtered and the volatile components removed resulting in the isolation of the desired product as a yellow oil (0.123 g, 19.8 percent yield). 'H NMR (toluene-de): 5 1.14 (d, 'JHH= 6.6 Hz, 6 H), 1.22 (br, 6 H), 1,70 (d, ‘JHH= 9.0 HZ, 2 H), 1.83 (d, 'JHH= 9.6 Hz. 2 H), 2.10 (s, 6 H) 2.71 (s, 6 H), 3.0-3.2 (br, 2 H). 3.3-3.5 (br, 2 H). 6.59 (d, ‘JHH= 7.2 Hz, 4 H). 6.77 (t. VHH= 7.2 Hz, 2 H), 6.9-7.1 (m, 10 H). '‘C NMR (toluene-da): 5 23.96 (br), 24.22 (br), 24.36 (br), 25.23 (br), 29.47, 39.72. 43,05. 62.23. 122.70, 123.73 (br). 124.08 (br), 124.33. 127.23, 130.82, 139.26 (br). 140.16 (br). 144.90.144.92,149.03. Example 5 ra£>diisoprGpylamidoborane-bis-ii’-(2-methyl-4-phenylinden-1 -yl)zirconium V-1,4-diphenyl-1.3-butadiene (iPr)2r4-B 5A) Preparation of Diisopropylaminoboron dichloride. To a methylene chloride solution of trichloroborane (1.0 M, 100 ml, 0.10 mole) was added dropwise at -78*’C diisopropylamine (13.108 ml, 0.100 mole) over a 30 minute period. The solution was allowed to stir for 1 hour, during which a white precipitate funned. The mixture was allowed to warm to room temperature, and solvent was removed under reduced pressure. The residue was dissolved in 100 ml of dry toluene, triethylamine (13.94 ml, 0.10 mole) was added and the solution was stirred overnight at room temperature. The mixture was filtered, the residue was washed with 20 ml of toluene. Solvent was removed under reduced pressure from the combined filtrates, and the resulting oil was purified by vacuum distillation (25-28 °C, 13 Pa, 0.1 mm) to give 9.2g (51 percent) of product as a coloriess liquid, 'H NMR (CeDe): 6 0.95 (d, 12 H), 3.63 (broad multipiet, 2 H). SB) Preparation of N,N-diisopropylamino bis(2-methyl-4-phenyiindenyl) borane To 25 ml THF solution of N,N-diisopropyiaminoboron dichloride (0.858 g, 4.72 mmole) at room temperature was added drop wise lithium (2-methyl-4-phenyl)indenide (2.00 g, 9.44 mmole in 20 ml THF). The mixture was stirred for 24 hours. Solvent was removed under reduced pressure. The residue was extracted with toluene (2x50 ml), filtered through a medium frit, and solvent was removed under reduced pressure to give a light yellow solid (2.4g, 97 percent). 5C) Preparation of rac-diisopropyiaminoborane-bis-ri’- (2-methyl-4-phenyl indenyl)zirconium TI'‘-I ,4'diphenyl-1,3-butadiene N,N-diisopropylamino bis(2-methyl-4-phenylindenyl) borane (1.20 g, 2.3 mmole) was dissolved in 40 ml of toluene, 2.1 equivalents of potassium bis(trimethylsilyl) amide (0.964 g, 4.8 mmole ) was added and the resulting mixture was stirred at room temperature for 24 hours. Volatile components were removed under reduced pressure, and the resulting orange solid washed with 10 ml of hexane, filtered and pumped dry. The dipotassium salt residue (1.3 g, 95 percent, 2.18 mmole) was predissolved in 25 ml of toluene. (1,4-diphenyl-1,3-butadiene)-bis(triethylphosphine)zirconium dichloride (1.318 g, 2.18 mmole) was added and the solution stirred for 12 h at room temperature. The product mixture was filtered through diatomaceous earth filter aid and the solvent of the filtrate was removed under reduced pressure. Further purification was carried out by recrystallization from hexane to yield 0.85 g (48 percent) of the desired product as a dart 'H NMR (Chides): 5 7,6(d. 2H); 7.42-7.00, (m, 18 H); 6.9 (d, 2H); 6.82 (d. 4H); 5.57 (s, 2H); 4.03. m, 2H); 3.45-3.57 (dd, 2H); 1.8(s,6H); 1.28-1.33 (m, 12H). Example 6 Preparation of diisopropylamidoboranebis-(cyclopentadienyl)zirconium dichloride 6A) Diisopropylamrdoborane dichloride To a solution of BCI3 (17 g, 145 mmol) in CH2CI2 (25 ml) at -78 ‘ C was slowly added diisopropylamine (18.49 ml, 132 mmol). A white precipitate formed during addition. The mixture was warmed to room temperature to give a coloriess solution. Solvent was removed under high vacuum at room temperature, the residue was then dissolved in benzene (45 ml). Triethylamine (18.8 ml, 134.6 mmol) was added to the solution at room temperature, the mixture was then stirred vomited at room temperature, then filtered to give a red solution. Vacuum distillation (27-28 °C, 4 Pa) gave the product (15 g. 57 percent) as a colorless liquid: 'H NMR (500 MHz, CDCb) d 1.26 (d, 12H, J = 5.8 Hz). 3.95 (br, 2H. NCH) '‘C NMR (100 MHz, CDCI3) d 22.1, 49.2 (br), 'B NMR (115 MHz, CDCI3) 29.4. MS (EI„ m/e (intensity)): 181 (M+, 5), 166 (43), 124 (61). 43 (I 00) 6B) Diisopropylamidobis(cyclopentadienyl) borane To a solution of the above product (0.39 g, 2.1 mmol) in THF (5 ml) at -78 "C was added dropwise a solution of lithium cyclopentadienide (0.31 g, 2.1 mmol) in THF (10 ml) at -78 ‘'C. The mixture was slowly warmed to room temperature and stirred foresight at room temperature to give a red solution. After solvent removal, the residue was extracted with pentane (3x), filtered, pentane was then removed to give the product (0.55 g, 100 percent) as an yellow syrup. 'B NMR (115 MHz, C6D.) d 39.8 (major), 30.4 (minor). MS (El, m/e (intensity)): 241 (M+, 47), 226 (40), 176 (16), 93 (100) GC-MS was also recorded on the reaction mixture shortly after mixing the two reagents at -78 ‘'C, from which only cydopentadienyldiisopropylboron chloride was detected: MS (El, m/e (intensity)): 211 (M+, 24), 196 (100), 154 (22). 6C) Dilithium diisopropylamidoboryldicyclopentadienide To a solution of the above product (0.61 g, 2.53 mmol) in THF (7 ml) at -78 °C was added lithium diisopropylamide (5.57 mmol, prepared in situ Irom diisopropylamine (0.780 ml, 5.57 mmol) and Buy (2.50 M, 2.23 ml, 5.57 mmol). The mixture was warmed to room temperature and stirred for2 hr. Solvent was then removed, residue was washed with pentane to give the product (0.58 g, 91 percent) as a white solid: 'H NMR (360 MHz, THF-ds) d 1.24 (d, 12H, J = 6.8 Hz, NCHCH3), 4.54 (m, 2H. NCH), 5.74 (t. 4H, J= 2.4 Hz), 5.83 (t, 4H, J = 2.4 Hz) '‘C NMR (100 MHz, THF-ds) d 23.9 (NCHCH3), 25.9 (NCHCH3), 49.3 (NCH), 104,4, 111.9 'B NMR (115 MHz, THF-da) d 44.6 6D) Diisopropylamidoboranebis(cyclopentadienyl)zirconium dichloride To a solution of diisopropylamidobis(cyciopentadienyl)borane (0.71 g, 2.95 mmol) in Ego (15 ml) at -78 ‘ C was added lithium diisopropyiamide (6.93 mmol). The mixture was stirred for 2 hr at room temperature to give a slightly turbid solution. The solution was then added to a suspension of ZrCU (0.69 g, 2.95 mmol) in EtaO (15 ml) at -78 °C. The resulting mixture was stirred overnight at room temperature to give an yellowish suspension. Solvent was partially removed and the residue concentrated and cooled to -78 ° C to give the product (0.50 g, 38 percent) as colorless crystals. 'H NMR (400 MHz. CDCI3) d 1.32 (d, 12H, J = 7.0 Hz), 2.92 (m. 2H), 5.65 (t, 4H, J = 2.4 Hz), 6.80 (t, 4H, J = 2.4 Hz). '‘C NMR (100 MHz, CDCI3) d 24.6, 49.6, 111.4, 125.7. '‘B NMR (115 MHz. CDCI3) 5 37.6. HRMS (El), calculated for Ci6H22BNCi2Zr: 399.0269, found: 399.0272, Example 7 Preparation of meson-diisopropylamidoboranebis(inden-1-yl)zirconium dichloride 7A) Diisopropylamidobis(inden-1 -yl)borane To a solution of diisopropylaniidoborane dichloride (Example 3, step A)) (1.10 g, 6,0 mmol) in THF (10 ml) at -78 ** C was added dropwise a solution of lithium indenide (1.50 g, 12.3 mmol) in THF (40 ml) at -78 ° C. The mixture was slowly amide to room temperature and stirred overnight at room temperature to give a red solution. After solvent removal, the residue was extracted with CH2CI2 (3x), filtered and the solvent removed to give the desired product (2.12 g. 100 percent) as a white solid: 'B NMR (115 MHz. CgD,) d 41.4. MS (El, m/e (intensity)): 341 (M+, 8), 226 (100). HRMS (El), calculated forC24H28BN C24H28BN: 341.2315, found: 341.2310 78) Meso-Diisopropylamidoboranebis(inden-1-yl)zirconium dichloride To a suspension of the above product (0.39 g, 1.41 mmol) in Et20 (10 ml) at -78 was added lithium diisopropyiamide (in situ prepared from piranhas (2.62 mmol) and BuLi (2.50 M, 2.62 mmol). The mixture was stirred over night at room temperature to give an orange suspension. Solvent was removed and the residue extracted with toluene, and filtered. Toluene was then removed to give an orange solid composed of a mixture of the two stereoisomers (rac/Meso, about 6:4). Repeated recrystallization (3x) from toluene at -78 °C gave the pure meso isomer (0.08g, 14 percent) as an orange solid. M.p. = 250 -254 'C (dec). 'HNMR (500 MHz, CDCI3) 1.54(d. 6H. J=6,6 Hz), 1.57 (d, 6H, J= 6.8 Hz). 4.27 (m, 2H. NCH), 5,91 (d, 2H, J3.0 Hz), 6.9 (m. 4H), 7.17 (t, 2H, J’7.6 Hz), 7.31 (dd, 2H, J= 8.3, 3.6 Hz), 7.53 (d, 2H, J= 8.6 Hz). ‘'C NMR (75 MHz, CDCI3) d 24.7, 25.0 (NCHCH3). 49.7, 100.2 (BC), 115.7,117.2, 1252, 125.3, 125.6, 125.9, 126.5, 131.4. ‘'B NMR (115 MHz, CDCI3) 8 39.5. HRMS (El), calculated for C24H26BNC,2Zn 499.0582. found, 499.0606. MS (EI, m/e (intensity)): 501 (M+, 20), 458 (7), 341 (18), 226(93), 143(80), 115(99) Example 8 Preparation of rac-diisopropylamidoboranebis(inden-1 -yl)zirconium bis(dimethylamide) To a mixture of diisopropylamidobis(inden-1-yl)borane (Example 4, step A)) (1.01 g, 2.96 mmol) and Zr(NMe2)4 (0.79 g, 0.96 mmol) was added toluene (15 ml). The resulting solution was heated to 65 °C and stirred for 2 hr to give a bright red solution. The product consisted of two isomers with a ratio of 6.7:1. The solution was filtered, concentrated, and cooled to -78 °C to give the pure rac isomer (0.50 g, 33 percent) as red crystals. The structure was confirmed by X-ray diffraction analysis on single crystals grown from toluene / hexane at -20 "C. M.p. = 220 "C (dec.). 'H NMR (500 MHz, CgDe) d 1.20 (d, 6H, J= 6.8 Hz), 1.27 (d, 6H, J= 6.6 Hz), 2.61 (s, 12H), 3.86 (in, 2H), 6.04 (d, 2H, J= 2.9 Hz), 6.74 (m, 4H), 7.00 (t, 2H, J = 7.6 Hz), 7.3 7 (dd, 2H, J = 8.5. 0.9 Hz), 7.52 (d, 2H, J = 8.5 Hz). "C NMR (90 MHz. CsDe) 5 24.6, 24.9, 47.9 (NCH3), 49.6.105.6.112.4,123.1, 123.2,124.0,124.2, 126.3,129.1. "BNMR(115MHz, C6D6)d40.8. HRMS (El), calculated for CasHaaBNaZn 517.2206, found, 517.2217. MS (El, m/e (intensity)): 517 (M+, 20), 471 (45), 429 (100), 330 (24), 226 (70) Example 9 -Diisopropylamidoboranebis(inden-1-yl)zirconium dichloride To a solution of rac-diisopropylamidoboranebis(inden-1-yl)zirconium bis(dimethylamide) (0.50 g, 0.96 mmol) in toluene (35 ml) at room temperature was added trimethylsilyl chloride (2.0 ml, 15.76 mmol). The solution was stirred for 8 h at room temperature to give an orange suspension. Solvent was removed, residue was washed with pentane (2x) to give the desired product (0.40 g, 83 percent) as an orange powder. Single crystals suitable for X-ray structural analysis were grown from mixed solvents of CH2CI2 and hexane at -20 °C. M.p. = 242 °C (dec). ‘H NMR (500 MHz, CDCI3) d 1.50 (d, 6H, J = 6.8 Hz), 1.55 (d, 6H, J = 6.6 Hz), 4.24 (heptet, 2H, J = 7.7 Hz), 5.79 (d. 2H. J = 3.0 Hz), 6.80 (dd, 2H, J= 3.2, 0.7 Hz), 7.07 (t, 2H, J = 7.6 Hz), 7.28 (dd, 2H, J = 7.0, 0.7 Hz), 7.3 8 (t, 2H. J = 8.0 Hz), 7.58 9d, 2H, J= 8.8 Hz). '‘C NMR (75 MHz, CDCI3) d 24.7, 25.0, 49.6, 98.4 (BC), 113.1, 114.1, 122.0, 123.0,125.8, 126.4,127.2,131.9. "B NMR (115 MHz, CDCI3) d 39.2. HRMS (El), calculated for C24H26BNCl2Zn 499.0582, found, 499.0606. MS (El, m/e (intensity)): 501 (M+, 20), 458 (7), 341 (18), 226 (93), 143 (80), 115 (99). Anal. Calculated for C24H26BNCl2Zn C, 57.48; H, 5.19; N, 2.79. Found: C, 57.46; H, 5.32; N, 2.68. Example 10 Preparation of rao(diisopropylamidoborane)bis(tetrahydroinden-1-yl)zirconium dichioride A solution of diisopropylamidoboranebis(inden-1-yl)zirconium dichioride (Example 6) (0.16 g, 0.32 mmol) in CH2CI2 (7 ml) was added to an autoclave reactor containing PtOa (0.0105 g). The mixture was flushed four times with H2 (200 psi, 1.4 MPa), then charged with H2 (1500 psi, 10.4 MPa) and stirred for 15 h at room temperature to give a greenish suspension. CH2CI2 (25 ml) was added the mixture which was then filtered- Solvent was removed under reduced pressure and the residue was washed with pentane (2x) to give diisopropylamidoboranebis(tetrahydro-inden-1-yl)zirconium dichioride (0.15 g, 92 percent) as a slightly greenish solid. 'H NMR (400 MHz, CeDe) d 1.06 (d, 12H, J = 6.6 Hz), 1.33 (m, 2H). 1.47 (m. 2H). 1.92 (m, 4H), 2.05 (t. 1H, J = 4.8 Hz), 2.09 (d. 1H, J = 5.0 Hz), 2.34 (m, 2H), 2.53 (t, 1H, J = 5.3 Hz), 2.56 (t, 1H, J = 5.0 Hz), 320 (m, 2H). 3.60 (hept, 2H. J = 6.6 Hz), 5.01 (d, 2H, J=: 2.9 Hz), 6.53 (d, 2H, J= 2.6 Hz). '‘C NMR (100 MHz, CeDe) d 23.0, 23.6, 24.4, 24.7. 24.8. 27.0, 49.6, 109.7, 121.6. 124,2, 136.1. ‘'B NMR (115 MHz. CeDe) d 39.2 ppm. HRMS (El) Calculated for C24H34'‘BNCl2Zr 507.1208, found 507.1198 Example 11 Preparation of rao-N,N-diisopropylamidoborane-bis-n’- (2-methyl-4-naphthyl indenyl) zirconium •n’-1,4-diphenyl-1,3"butadiene. (iPr)2N-B 11 A) Preparation of potassium (2-metfiyl-4-naphthyl) indenide 2-Methyl-4-naphthylindene (1.00 g, 3.27 mmole) was dissolved in 20 ml of toluene, potassium bis(trimethylsilyl)amide (1.05 equivalent 3,43 mmole, 0.684 g) was added and the reaction mixture was stirred at room temperature for 24 hours, during which a yellow solid precipitated. Hexane was added (20 ml) and the mixture was stirred for 2 h. The solid product was isolated by vacuum filtration through a medium porosity frit. The solid was pumped dry giving 1.10 g, 98 percent of the desired product. 11B) Preparation of N,N-diisopropylamino bis(2-methyi-4-naphthylindenyl) borane To a solution of N,N-diisopropylaminoboron dichloride (0.309 g, 1.70 mmole) in 25 ml of THF at room temperature was slowly added dropwise a 10 ml THF solution of potassium (2-methyl-4-naphthyl) indenide (1.00 g, 3.40 mmole). The mixture was stirred for 24 hours at room temperature, solvent was removed, and the residue was extracted with toluene (2x25 ml). The combined extracts were filtered through a medium frit, and solvent was removed under reduced pressure to give a light yellow solid (1.0 g, 95 percent). 11C) Preparation of raoN.N-diisopropylaminoborane-bis-n’- (2-methyl-4-naphthyl indenyl) zirconium V-1,4-diphenyl-1,3-butadiene. N,N-diisopropylamino bis(2-methyl-4-naphthylindenyl) borane (0.860 g, 1.38 mmole) was dissolved in 20 ml of toluene, 2.05 equivalents of potassium bis(trimethylsilyl)amide (0.566 g, 2.84 mmole) was added and the reaction mixture was stirred at room temperature for 24 hours. Volatile components were removed under reduced pressure, und the residue was redissolved in 25 ml of toluene. While stirring at room temperature, (1.4-diphenyl-1,3-butadiene)bis(triethylphosphine)-zirconium dichloride (0.835 g, 1.38 mmol) was added and the solution was stirred for 12 h at room temperature. The product mixture was filtered through diatomaceous earth filter aid and the solvent of the filtrate was removed under reduced pressure. Further purification was canoed out by recrystallization from hexane to yield 0.27 g (21 percent) of the desired product as a solid. 'H NMR (CeDe): 5 7.75-7.00. (mm, 30 H); 4.82 (s, 2H); 3.85-3.95(m, 2H); 3.62-3.70 (dd, 2H); 1.82-1.9 (dd, 2H) 1.6 (s, 6H); 1.10-1.33 (m, 12H). Example 12 raol ,2-bis(dimethylam!dodiborane)bis(2-methyl-4-phenylinden-1 -yOzirconium TI’-1 ,4-diphenyI-1,3-butadiene 12A) Preparation of 1,2-Bis(2-methyl"4-phenylinden-1-yl)-1,2-bis(dimethylamido)" diborane Bis(dimethylamido)diborondichloride {0.500 g, 2.77 mmol) in diethylether (10 ml) was added dropwise to a solution of 2-methyl-4-phenylindene, lithium salt (1.407 g, 11.07 mmol) in diethylether (50 ml) at 0 ""C. This mixture was stinted overnight at room temperature and the volatiles were removed. The residue was extracted using CH2CI2. Filtration and removal of the CH2CI2 resulted in the isolation of a the desired product as a pale yellow solid (0.902 g, 62.6 percent yield). 12B) Preparation of 1,2-Bis(dimethylamido)-1,2-bis(2-methyl-4-phenylindene)diborane, dipotassium salt. 1.2-Bis(dimethylamido)-1,2-bis(2-methyl-4-phenylindene)diborane (0.791 g, 1.52 mmol) and KN(TMS)2 (0.607 g, 3.04 mmol) were stirred together in toluene (50 ml) overnight. The reaction mixture was then refluxed for one hour, cooled to room temperature, and dried under vacuum. The residue was then slurried in hexane and filtered and the gold microcrystalline solid dried under vacuum (0.881 g, 97.1 percent yield). 12B) Preparation of rao-[1,2-Bis(dimethylamido)-1.2-bis(2-methyl-4-phenylindene)diborane]2irconium(f/ans,f/ans-1,4-diphonyl-1,3-butadiene) 1,2-Bis(dimethylamido)-1,2-bis(2-methyl-4-phenylindene)-diborane, dipotassiium salt (0.808 g, 1.35 mmol) was added slowly as a solid to a solution of (1,4-diphenylbutadiene)ZrCl2(PEt3)2 (0.819 g, 1.35 mmol) in toluene (75 ml). This mixture was allowed to stir overnight. After the reaction period the mixture was filtered and the volatiles removed resulting in the isolation of a deep red residue. The residue was then slurried in cold hexane, filtered, and dried under vacuum resulting in the isolation of the desired product as a microcrystalline solid (0.501 g, 45.3 percent yield). 'H NMR (CeDe): 6 1.1-1.2 (m. 2 H), 2.02 (s, 6 H), 2.66 (s, 6 H), 2.90 (s. 6 H). 3.3-3,4 (m, 2 H), 5.28 (s, 2 H), 6.82 (d, ‘JHH= 6.6 Hz, 2 H). 6.9-7.3 (m. 14 H), 7,53 (d, VHH= 8.4 Hz, 2 H). '‘C NMR (CeDe): 5 15,10.42.17, 44.36. 86J8, 93.34, 106.54, 119.17,123.12,123.39, 123.71,124.26, 127.88, 128.51, 128.90, 129.34, 135.76, 140.85,145.80. Example 13 /ago-diisopropylamidoborane-bis-Ti’-(2-methyl-4-phenylinden-1 -yl)hafnium Ti’-1.4-diphenyl-1,3-butadiene Hafnium tetrachloride (0,375 g, 1.17 mmol) was slurried into 40 ml of toluene. To this slurry were added triethylphosphine (0.346 ml, 2.34 mmol, via syringe), Li powder (Aldrich, low sodium, 0.081 g, 11.7 mmol), and 1,4-diphenyl-1,3-butadiene (0.242 g, 1.17 mmol). The reaction mixture was stirred overnight at room temperature then filtered using a medium porosity frit and diatomaceous earth pad to remove the unreacted Li metal. To the filtrate was added dipotassium diisopropylamidobis(1-(2-methyl-4-phenylindenide))borane, K2rPr2NB(2-Me-4-Ph-indenide)2], (0.700 g, 1.17 mmol) using 10 ml of toluene to aid in the transfer. The reaction mixture was stinted for 1 hour at room temperature. The toluene was removed under reduced pressure and the reaction product was extracted with hexane (twice) and filtered (medium porosity frit witty diatomaceous earth pad). Additional product was obtained by extracting the salt byproduct using toluene and registering using a medium porosity frit and diatomaceous earth pad, ‘H NMR spectroscopic analysis indicated that the desired rao-'Pr2NB(2-Me-4-Ph-inden-1-yl)2Hf(1,4-diphenyl-1,3-butadiene) isomer was largely insoluble in hexane and that the undesired meso-isomer could be separated by repeated extraction with hexane. Final isolation and purification of rac’'Pr2NB(2-Me-4-Ph-inden-1-yl)2Hf(1,4-diphenyl-1,3-butadiene) was accomplished by sophist extraction using hexane. After the hexane extract becomes coloriess the thimble was removed and dried, yielding 0,042 g of pure rao-'Pr2NB(2-Me-4-Ph-inden-1-yl)2Hf(1,4-diphenyl-1,3-butadiene) as determined by ‘H and ‘‘C NMR spectroscopic analysis, 'H NMR (CeDe): 5 7.6(d, 2H); 7.42-7.00. (m, 18 H); 6.9 (d, 2H); 6.82 (d, 4H); 5.57 (s, 2H); 4.03. m, 2H); 3.45-3,57 (dd. 2H); 1.8(s.6H); 1.28-1.33 (m. 12H). Example 14 rac’diisopropylamidoborane-bis-r|’-(2-methyl-4-phenylinden-1 -yl)zirconium -n’-l .4-diphenyl-1,3-butadiene In a glove box, diisopropylamidobls(2-methyl-4-phenylinden-1-yl)borane (0.125g, 0.240 mmole) was dissolved in 20 ml of dry THF, and 2 equivalents of potassium bis(trimethylsilyl)amide (0.500 molar solution, 0.960 ml, 0.480 mmole) was added dropwise over 10 minute period at room temperature, after which the solution was stirred for 4 hours. Volatile components were removed under reduced pressure and the remaining solids were redissolved in 25 ml of toluene. While stirring at room temperature, (1,4-diphenyl-1,3-butadiene)bis(triethylphosphine)zirconium dichloride (0.145 g, 0,240 mmole) was added and the resulting solution was stirred for 4 hours. The product was recovered by filtering the mixture through diatomaceous earth and removing the solvent of the filtrate under reduced pressure. Further purification was carried out by recrystallization from hexane to yield the product as a dark red solid. Example 15 Preparation of rao-{i’r2NC(N'Pr)2}borane-bis-n’- (2"methyl"4-phenylindenyl) zirconium D’-1,4-diphenyl-1,3-butadiene. 15A) Preparation of 'Pr2NC(N'Pr)2}boron dichloride. DiisopropylcartDodiimide (1.178 g, 9.33 mmole) was dissolved in 20 ml of toluene, cooled to 0 -C, and solid lithium diisopropylamide (1.00 g, 9.33 mmole) was added slowly to the solution over a 5 minute period. The solution was allowed to wand to room temperature while stirring for 3 hours. This solution was subsequently added dropwise over a 30 minute period to a 1 molar heptane solution (0 ‘C) of boron trichloride (9.33 ml, 9.33 mmole) and allowed to ami to room temperature overnight. The solution was filtered, and solvents were removed under reduced pressure to yield 2.3 g (97 percent) of light yellow oil. 'H NMR (CeDs): 53,6-3.4 (m, 2H); 3.4-3.25 (septet, 2H); 1.43 (d, 12H); 0.8 (d. 12 H), 15B) Preparation of bis(2-methyl-4-phenylindenyl) {'Pr2NC(N'Pr)2}borane 'Pr2NC(N'Pr)2}boron dichloride (0.30g, 0,97 mmole) was dissolved in 30 ml of THF, and potassium (2-methyM-phenyl)indenide (0.476g, 1.95 mmole) was added. The mixture was stirred for 24 hours at room temperature, followed by heating at reflux for 4 hours. The product mixture was allowed to cool to room temperature, and solvent was removed under reduced pressure. The residue was extracted with toluene (2x50 ml), filtered through a medium frit, and solvent was removed in vacuo to give a light yellow solid (0.533 g, 85 percent). 15C) Preparation of 'Pr2NC(NT'r)2}borane -bis-D’- (2"methyl-4-naphthyl indenyl) zirconium D’-1,4-diphenyl-1,3-butadiene. Bis(2-methyl-4-phenylindenyl) {Pr2NC(N'Pr)2}borane (0.533 g, 0,82 mmole) was dissolved in 20 ml of toluene, 2.00 equivalents of potassium bis(trimethylsilyl)amide (0.0.328 g, 1.65 mmole) was added and the reaction mixture was stirred at room temperature for 24 hours. Volatile components were removed under reduced pressure, and the residue was washed wittier 2x25 mL of hexane. Volatile components were removed under reduced pressure to yield 0.382 g (64 percent) of the orange solid dipotassium salt. A portion of this solid (0.100 g, 0.14 mmole) was dissolved in 15 mL of toluene. While stirring at room temperature, (1.4-diphenyl-1,3-butadlene)bis(triethylphosphine)zirconium dichloride (0.084 g, 0,14 mmole) was added and the solution was stirred for 12 h at room temperature. The product mixture was filtered through diatomaceous earth filter aid and the solvent of the filtrate was removed under reduced pressure to give 0.115 g (88 percent) of chide product which existed as a rac/meso mixture. Further purification was carried out by recrystallization from hexanes to yield 0.015g (12percent) of /ac-product as a dark red solid. ‘H NMR (CeDe): 5 7.6-6.7, (mm, 26 H); 5.55 (s. 2H); 4.05-3,90(m, 2H); 3.5 (dd, 2H); 2.7-2.4 (m, 2H); 1.78 (s, 6H); 1.55 (dd, 2H); 1.25 (m, 12 H); 0.95 (m, 12H). Example 16 rao-dimethylamidoborane-bis-r|’-(2-methyl-4-phenylinden-1 -yl)zirconium Ti’-1,4-diphenyl-1,3-butadiene 16A) Preparation of Dimethylamidodibromoborane. B(NMe2)3 was added to BBra dropwise. The reaction was immediate and exothermic. This mixture was allowed to stir for 2 hours at which time NMR analysis showed the reaction to be essentially quantitative and complete (22.510 g, 99.9 percent yield). 'H NMR (CeDe): 5 2.31 (6 H), '‘C NMR (CeDe): 5 41.45. 168) Preparation of Dimethylamido-bis(2-methyl-4-phenylindinyl)borane. A solution of dimethyamidodibromoborane (0.511 g, 2,38 mmol) in toluene (10 ml) was cooled to O’C and diethylether (2 equivelents) added. This mixture was then added dropwise to a solution of 2-methyl-4-phenylindene, lithium salt (1.011 g, 4,76 mmol) in THF (50 ml) at O’’C. This mixture was then allowed to stir for overnight at room temperature. After the reaction period the volatile components were removed and the residue extracted and filtered using hexane. Removal of the hexane resulted in the isolation of a yellow oil (1.103 g, 99.9 percent yield). 16C) Preparation of Dimethylamido-bis(2'methyl-4-phenylindenyl)borane, dipotassium salt. Dimethylamido-bis(2-methyM-phenylindenyl)borane (1.010 g, 2.17 mmol) and KN(TMS)2 (0.866 g, 4.34 mmol) were stirred together in toluene (50 ml) eremite. The reaction mixture was then refluxed for one hour, cooled to room temperature, and dried under vacuum. The residue was then slurried in hexane and filtered and the orange microcrystalline solid dried under vacuum (1.246 g, >100 percent yield due to residual solvent still present as absented by NMR). 16D) Preparation of rac-[Dimethylamido-bis(2-methyl-4-phenylindene)borane]-zirconium {trans,transA ,4-diphenyl-1.3-butadiene). Dimethyiamido-bis(2-methyl-4-pheny-lindenyl)borane, dipotassium salt (1.246 g, 2.30 mmol) was added slowly as a solid to a solution of (1,4-diphenylbutadiene)ZrCl2(PEt3)2 (1.391, 2.30 mmol) in toluene (75 ml) and allowed to stir foresight. After the reaction period the mixture was filtered and the volatiles removed resulting in the isolation of a daric residue. This residue was slurried in hexane and filtered. Red crystals grew over a 2-hour period of time from the sitting hexane filtrate (0.222 g). The solid on the frit was washed through the frit using toluene and a second crop of crystals was grown from this mixture by allowing the solution to slowly concentrate over a period of one week by slow evaporation of the toluene (0.100 g). Combining the crystals obtained resulted in the isolation of a total of 0.322 g (18.4 percent yield) of highly pure product. 'H NMR (CeDe): 6 1.71 (s. 3 H), 1.7-1.8 (m, 2 H), 2.89 (s, 3 H), 3.4-3.5 (m, 2 H), 5.52 (s, 2 H). 6.76 (d, 'JHH= 7.2 Hz, 4 H), 6.8-7.4 (m. 12 H), 7.43 (d, 'JHH= 8.4 Hz, 2 H). '‘C NMR (CeDe); 5 15.95, 39.52, 85.43. 90.93, 104.13. 117.32, 12.49, 121.65, 122.3 (br), 123.32. 124.19. 124.32, 127.81, 127.83, 128.68, 128.74, 128.81. 136.06, 140.55,143.86. MS(EI): m/z 759.2635 (M-H)*, calcd. (M-H)* 759.2610. Example 17 bis(trimethylsilyl)amido('ri-fluoren-9-yl)(Ti-cyclopentadienyl)borane- zirconium dichloride. 17A) Preparation of bistrimethylsilylamido(9-fluorenyl)boron chloride n-Butyl lithium (2.5 M hexane, 4.20 ml. 10.50 mmol) was added to a solution of fluorene (1,66 g, 10.00 mmol) in THF (15 ml) at -78 °C. The resulting mixture was slowly warned up and stirred at room temperature for 5 h to give a red solution. The solution was cooled to -78 '‘C and added dropwise to a solution of bis(trimethylsilyl)amidoboron dichloride (TMS)2NBCl2 (2.42 g, 10.00 mmol) in THF (25 ml) at -78 ""C to give a light yellow solution. The solution was stirred overnight at room temperature. Volatile components were removed, and the residue was extracted with pentane and filtered. The pentane was removed to give the desired product (3.70 g, 100 percent yield) as a white solid. 'H NMR (400 MHz, CDCI3): 5 0.45 (s, 18H), 4.41 (s, 1H), 7.34 (dt. 2H. J = 7.4, 1.1 Hz), 7.42 (t, 2H. J = 7.3 Hz). 7.49 (d. 2H. J = 7.6 Hz), 7.87 (d. 2H. J = 7.4 Hz). '‘C NMR (100 MHz. CDCI3) 5 4.6, 121.0.125.4, 127.2. 127.3, 143.0. 145.9. 'B NMR (115.5 MHz. CDCI3.) 5 46,6. 17B) Preparation of bis(trimethylsilyl)amido(9-fluorenyl)(cyclopentadienyl)borane A solution of CpNa/THF (0.24 g. 2.40 mmol) in THF (15 ml) at -78 °C was added dropwise to a solution of bistrimethylsilyamido(9-fluorenyl)boron chloride (0.89 g. 2.40 mmol) THF (15 ml) at -78 'C. The resulting yellow solution was slowly warmed to room temperature with stirring and stirred over night. Volatile components were removed under reduced pressure, and the residue was extracted with pentane and filtered. The pentane solution was concentrated and cooled to -78 ‘'C to give the desired product (0.57 g, 59 percent) as a white solid. 'H NMR (400MHz,C6D6): 5 0.20 (s, 18 H), 1.71 (t, 2H, J = 1.4 Hz), 4.33 (s, 1 H), 5.93 (m, 1 H), 6.13 (m, 1 H), 6.69 (dd, 1 H, J = 14, 1.5 Hz), 7.09 (dt, 2H, J = 7.2, 1.5 Hz), 7. 19 (dt, 2 H, J = 7.4,1.7 Hz), 7.46 (dd. 2H, J = 7.4,1.1 Hz), 7.70 (dd, 2H, J = 7.6, 0.8 Hz). '‘‘C NMR (100 MHz. CeDe,) 5 5.1, 43.4, 120.6, 125.8, 126.7, 127.2, 132.2, 139.5, 142.9,143.1,147.4. ‘'B NMR (115.5 MHz, CeDe) 5 51.6. HRMS (El) calculated for CsaHssBNSi, (M-CH3), 386.1932; found, 386.1945. 17C)) bis(trimethylsiiyl)amidoborane(Ti-cyclopentadienyl)(Ti-fluoren-9-yl)zirconium dichloride A solution of lithium diisopropylamide (prepared in situ from piranha (0.54 ml, 3.84 mmol) and BuLi (2.5 M hexane, 1.61 mil, 4.03 mmol)) in THF (10 ml) was added to a solution of bis(trimethylsilyl)amido(9-fluorenyl)(cyclopentadienyl)borane (0.77 g, 1.92 mmol) in THF (10 ml) at -78 ""C. The resulting mixture was slowly warmed to room temperature and stirred overnight to give a dark red solution. Volatile components were removed to give an orange solid which was then dissolved in toluene (15 ml). The toluene solution was added to a suspension of ZrCU (0.40 g, 1.9 mmol) in toluene (8 ml) at -78 ‘C. The mixture was warmed to room temperature and stirred overnight to give a dark red suspension. Volatile components were removed under reduced pressure, and the residue was extracted with toluene and then filtered. The volatile components were removed under reduced pressure, and the residue was washed with pentane (3x) to give the product as red solid. mp = 252 - 254 (dec). 'H NMR (400 MHz, CDCI3): 5 0.26 (s, 9H), 0.50 (s, 9H), 5.44 (t, 2H, J = 2.4 Hz), 6.45 (t, 2H, J = 2.4 Hz), 7.19 (d, 2H, J = 8.4 Hz), 7.31 (t, 2H, J = 7.5 Hz), 7.62 (t, 2H, J = 7.8 Hz), 8.12 (d, 2H, J = 8.4 Hz). '‘C NMR (75 MHz, CDCI3) 5 4.8, 5.9, 105.3, 121.4, 122.9, 124.4, 125.4, 125.7, 129.1, 143,0. '‘B NMR (115.5 MHz, CDCI3) 6 48.2. HRMS (El) calculated for C24H3oBNSi2Cl2Zn 559.0434; found, 559.0443. Example 18 diisopropylamidoborane('n-cyclopentadienyl)(Ti-fluoren-9-yl)zirconium dichloride. 18A) Preparation of Diisopropylamido(9-fluorenyl)boron chloride The reaction conditions of Example 17A) were substantially repeated excepting that diisopropylamidodichloroboron was used in place of bis(trimethylsilyl)amido-dichloroboron. At the end of the reaction, solvent was removed, restate was extracted with CH2CI2 and filtered. Volatile components were removed to give the product (0.91 g, 98 percent) as a yellowish solid. 'H NMR (400 MHz, CDCI3): 5 1.36 (br. 6H), 1.79 (br, 6H), 4.41 (br, 1H), 7.35 (t. 2H. J = 7.7 Hz). 7.42 (t, 2H, J = 7.5 Hz), 7.50 (br, d, 2H, J = 4.7 Hz), 7.88 (d, 2H, J = 7.3 Hz). '‘C NMR (100 MHz, CDCI3) 5 24.5 (br), 43.2 (br), 48.5 (br), 120.2.124.4, 126.4,126.9.141.1 (br), 146.9. 'B NMR (115.5 MHz. CDC13) 5 37.2. HRMS (El) Calculated for C19H23BNCI, 311.1612; found, 311.1613. 188) Diisopropylamido(cyclopentadienyl)(9-fluorenyl)borane The reaction conditions of Example 17 B were substantially repeated excepting that diisopropylamido(9-fluorenyl)boron was used in place of bis(trimethylsilyl)amido(9-fluorenyl)boron chloride. Reaction of CpNa/THF (0.96 g, 9.60 mmol) and diisopropylamido(9-fluorenyl)boron chloride (2.98 g, 10.00 mmol) gave a reaction mixture which was extracted with hexane and flittered- Volatiles were removed to give the product (2.11 g, 62 percent) as a yellow solid. HRMS (El), Calculated for C24H28BN. 341.2315. found. 341.2329. 18C) Preparation of diisopropylamidoborane(Ti-cyciopentadienyl)(ri-fluoren-9-yOzirconium dichloride. The reaction conditions of Example 17C) were substantially repeated excepting that diisopropylamido(9-fluorenyl)boron (1,39 g, 4.08 mmol) was used in place of bis(trimethylsllyl)amido(9-fluorenyl)boron. The crude reaction mixture from this reaction was extracted with toluene and filtered. The solution was concentrated, pentane was added and cooled to -78 **C to give the product (0.75 g. 36 percent yield) as a red solid. mp = 280 - 282 X. 'H NMR (500 MHz. CeDe): 81.01 (d, 6H. J = 6.6 Hz), 1.22 (d. 6H,J = 6.9 Hz), 3.67 (pent. IH, J = 6.6 Hz). 3.80 (pent, IH. J = 6.6 Hz), 5.30 (t. 2H. J = 2.4 Hz). 6.38 (t, 2H, J = 2.4 Hz). 7.05 (d. 2H, J = 8.1 Hz), 7.12 (t, 2H, J = 7.5 Hz). 7.46 (t. 2H. J = 7.5 Hz). 7.92 (d, 2H. J = 8.5 Hz). 'C NNIR (90 MHz, CDC13) 5 24,2, 25.4, 49,1, 49.8,106.9.122.2.123.2,125.4.125.8.129.0,147.9. 157.1. '‘B NMR (115.5 MHz, C6D6) 5 39.4. EA. calculated for C24H28BNZrCl2: C. 57.25. H. 5.57. N, 2.78. Found: C, 55.44; H, 5.30; N. 2.62. Example 19 bis(trimethylsilyl)amidoborane bis(ti-inden-1-yl)zirconium bis(dimethylamide) Bis(trimethylsilyl)amidoboronbis(inden-1-yl) was prepared by reacting lithium indenide (0.50 g, 4.10 mmol) and bis(trimethylsilyl)amidoboron dichloride, (0.48 g, 2.00 mmol) in THF to give the product (0.75 g, 94 percent) as a yellowish solid. 'H NMR (400 MHz, CeDe, major isomer): 6 0.32 (s, 18H), 3.64 (s, 2H), 6,08 (dd, 2H, J = 5.5. 1.8.HZ), 6.48 (dd, 2H, J = 5.2 Hz). 6.82 (d.. 2H. J = 7.3 Hz). 0.93 (dt. 2H. J = 7.1. 1.2 Hz), 7.20 (m, 4H). 'B NMR (115.5 MHz. CeDe) 5 56.8. HRMS (El) calculated for C24H32BNSi2, 401.2166; found. 401.2182. EA. Calculated for C24H32BNSi2, C. 71.82; H. 7.98; N. 3.49. Found: C, 70.06; H, 8.06; N, 3.36, The bis(trimethylsilyl)amidoboron bis(inden-l-yl) (0.27 g, 0.67 mmol) and Zr(NMe2)4 (0.18 g, 0.67 mmol) were then combined in toluene (10 ml) 2 hours at GS’'C to give a red solution. Volatile components were removed under reduced pressure to afford the product as a red foam. 'H NMR (400 MHz, CeDe): 6 0.26 (s. 18H), 2,53 (s, 12H), 5.95 (d, 2H, J = 2.9 Hz), 6.64 (d, 2H. J = 2.9 Hz), 6,68 (t, 2H. J = 7.5 Hz), 6,95 (t. 2H, J = 7.6 Hz). 7.30 (d. 2H. J = 8.5 Hz). 7.45 (d, 2H, J = 8.8 Hz). ‘‘C NMR (100 MHz, CeDe) 5 5.6, 47.9, 105,1, 111,5, 122.2, 122.9, 124.2, 126,4,128,5, ‘'B NMR (115.5 MHz, CgDe) 5 50.3. HRMS (El) calculated for C28H42BN3Si2Zr, 577.2057; found, 577.2061. Example 20 Bis(trimethyl)silylamidobis(Ti-inden-1-yl)boranezirconium dichloride Bis(trimethylsilyl)amidoboron bis(inden-1-yl) (0.45 g, 1.12 mmol) and Zr(NMe2)4 (0.30 g, 1.12 mmol) were combined in THF to give an intermediate which was not further purified. Volatile components were removed under reduced pressure and replaced with CH2CI2 (10 ml). The mixture was stirred with trimethylsilane chloride (1.42 ml. 11.20 mmol) overnight at room temperature. Volatile components were again removed under reduced pressure and the residue was extracted with CH2CI2 and filtered. The solution was concentrated, layered with pentane. and cooled to -78 °C to give the desired product (0.54 g, 86 percent) as an orange solid. 'H NMR (500 MHz, CeDe): 6 0.20 (s. 18H). 5,54 (d, 2H, J = 3,3 Hz). 6.68 (dd, 2H, J = 2,1, 0,9 Hz), 6.85 (t. 2H, J = 7.0 Hz), 7.04 (dd. 2H, J = 8.1, 1.1 Hz), 7.17 (m, 2H, overlapped with solvent residue peak), 7.33 (d, 2H, J = 8.4 Hz), "C NMR (100 MHz. CeDe) 5 5.3, 112.8, 113.0, 123.6, 126.5, 127.1, 127.8, 132.1. 'B NMR (115.5 MHz, CeDe) 6 48.5. HRMS (El) calculated for C24H3oBNSi2Cl2Zr, 559.0434; found. 559.0432. Example 21 Preparation of rao 21A) 2-lsopropyl-4-phenyMndene i Sodium hydride (2.1 g , 60 percent dispersion in oil) was placed in 500 ml flask under nitrogen atmosphere. Hexane (about 20 ml) was added to remove the oil, the mixture was stirred briefly. After stirring stopped the NaH was allowed to settle and the liquids were removed by syringe. This procedure was repeated once more, then THF (200 ml) was added to the NaH and the suspension was cooled with an ice bath. Diethyl isopropylmalonate (10.10 g, 50.00 mmol) in THF (100ml) was added via an addition funnel over 30 min. After addition of the malonate was complete, the solution was stirred for an additional 40 min. A THF solution (30 ml) of 2-phenylbenzyl bromide (12.5 g, 50.5 mmol) was added via addition funnel and the mixture was stirred vomited. The next morning 100 ml of 1N ammonium chloride was added. The solution was diluted with ether (200 ml) and the organic layer was washed with brine, dried over Na2S04, and stripped of solvent under reduced pressure. The orange red oil was used without further purification. The crude alkylation product was dissolved in ethanol (300 ml) and water (75 ml). Potassium hydroxide (20 g) was added and the mixture was refluxed ovemight. After cooling, ethanol was stripped under reduced pressure. Hexane was added and stin-ed for 1 hour to dissolve any undesired organic materials. The hexane was decanted and water was added (about 150 ml). The solution was made acidic (to pH 1) by adding concentrated HCI. The desired carboxylic product was extracted with ether, dried over Na2S04, and stripped under reduced pressure. NMR spectra of the cmde product (10.74 g, 80 percent) indicated that ester hydrolysis and decartDoxylation were complete. The crude product, which solidified to a tan solid, was used without further purification. Thionyl chloride (50 ml) was added to the cartDOxylic acid and the mixture was stin-ed ovemight at room temperature to dissolve the acid. The excess thionyl chloride was removed under reduced pressure and the remaining acid chloride was dissolved in methylene chloride (75 ml). This solution was added dropwise via an addition funnel to a suspension of aluminum chloride (5.70 g, 42,5 mmol) in methylene chloride (25 ml) and cooled with an ice bath. The reaction was allowed to warm slowly to room temperature and stirred overnight. The solution was poured onto ice (about 100 ml) and stirred vigorously for 1 hour. The organic layer was separated, the aqueous layer was washed once with ether and the combined organic layers were washed with brine, dried over Na2S04, and stripped under reduced pressure. The crude 2-isopropyl-4-phenylindanone (10.0 g) as an orange-brown oil was used without further purification. 2-lsopropyl-4-phenylindanone (12.1 g, 48 mmol) was stirred in a mixture of THF and methanol (100 ml; 2/1) while sodium borohydride (1.5 g, 40 mmol) was added in small portions over 30 min. After stirring overnight, ice (about 50 ml) was added and the mixture was stirred for 0.5 h. The THF and MeOH were removed under reduced pressure. Ether (about 250 ml) was added, the pH was adjusted to pH 1 by the addition of aqueous HCI and the ether layer was separated. The ether was washed with saturated sodium bicartjonate solution, then brine, dried over Na2S04, and evaporated under reduced pressure. The mixture of alcohol isomers (11,0 g, 43,5 mmol, 90 percent) was obtained as a waxy tai. solid. It was used without purification. The crude mix of isomeric alcohols was dissolved in toluene (150 ml) to which p-toluene sulfonic acid (0.5 g) was added. The solution was refluxed in a flask equipped with a Dean-Stark trap for 1.5 h then cooled. Solid sodium bicarbonate was added and the mixture was stored overnight in a refrigerator. The next morning water (100 ml) was added and the organic layer was separated, dried over Na2S04, and stripped under reduced pressure. The product. 2-isopropyl-4-phenylindene (10.4 g) was obtained as a brown oil. Analysis by GC indicated a purity of >96 area percent. This material was stored cold under an inert atmosphere until ready for further conversion. 'H-NMR (CDCI3): DDD1.18 (d. 6H). 2.74 (sept. 1H), 3.39 (s, 2H), 6.53 (s, 1H). 7.09-7.55 (m.8H). 21B) Lithium 2-isopropyl-4-phenylindenide To a toluene solution (25 ml) of 2-isopropyl-4-phenylindene (3.34 g. 14.25 mmol), in a glove box filled with argon, was added n-butyl lithium (5.500 ml, 13,75 mmol). The mixture was stirred at room temperature ovemight. The toluene was removed under reduced pressure. Hexane (20 ml) was added and removed under reduced pressure then added again (50 ml). The mixture was stirred for 1 h then filtered, washed with about 15 ml hexane and the filtrate dried under vacuum. The lithium indenide product (3.09 g) was obtained as an orange-brown powder. This material was stored in the glovebox until needed. 'H-NMR(d8-THF): 0DD1.27 (d, 6H), 3.02 (sept, 1H),5.84(s. 1H),6.06(s, IN), 6.42-6.51 (m, 2H), 7.15 (t, 1H), 7.18 (d. 1H). 7.26 (t. 2H), 7.82 (d, 2H). '‘C-NMR (ds-THF): ppm 147.00,141.54, 130.59, 130.40, 129.20, 128.16, 126.70, 125.02, 118.68, 113.92. 113.40, 91.01, 89.77, 30.62,25.78. 21C) N,N-diisopropylamido bis(2-isopropyl-4-phenylindenyl) borane To 25 ml toluene solution of N,N-diisopropylamidoboron dichloride (0.501 g. 2.75 mmole) at room temperature was added drop wise potassium (2-isopropyl-4-phenyl)indenide (1.50 g, 5.51 mmole in 20 ml toluene). The mixture was heated to reflux and stirred for 6 hours. The solution was cooled to room temperature, filtered through a medium frit, and solvent was removed under reduced pressure to give a light yellow solid (1,57g, 99 percent). This material was further purified by column chromatography (silica gel /hexane) to yield 0.6g (38 percent) of a light yellow solid (96 percent pure by GC). 21D) rac-diisopropyiamidoborane-bis-D’-(2-isopropyl-4-phenyl indenyl)zirconium D"*-1,4-diphenyl-1.3-butadiene In a glove box, N,N-diisopropylamino bis(2-isopropyM-phenylindenyl) borane (0.380g, 0.660 mmole) was dissolved in 20 ml of toluene, 2.1 equivalents of potassium bis(trimethylsilyl) amide (0.276,1.38 mmole) was added and the resulting mixture was stirred at room temperature for 24 hours. Removed volatiles under reduced pressure and washed. The resulting orange solid was combined with 10 ml of hexane, filtered and pumped dry. The dipotassium salt residue (0.415 g, 97 percent, 0.635 mmole) was redissolved in 20 ml of toluene, and (1,4-diphenyl-1,3-butadiene)bis(triethylphosphine)2irconium dichloride (0.384g, 0.635 mmole) was added. The solution was stin-ed for2 h at room temperature, followed by heating at 80 -C for 6 hours. The product mixture was cooled to room temperature, filtered through diatomaceous earth and the solvent of the filtrate was removed under reduced pressure. Further purification was carried out by recrystallization from hexane to yield 0.21 g (36 percent) of product as a solid. 'H NMR (CeDe): 5 7.62(d, 2H); 7.42-6.7, (mm, 24 H); 5.79 (s. 2H); 4.5, sept. 2H); 3.45-3.57 (dd, 2H); 2.8-2.9 (sept, 2H)1.65-1.72 (dd. 2H); 1.35(d,12H); 1.2-1.3 (m. 12H). /ac-aiisopropylamidoborane-bis-ri'-(2-methyl-4-phenylinden-1-yl)zirconium TI’-1 ,4-diphenyl-1,3-butadiene In a glass flask, 0.922 ml of a toluene solution of methylbis(octyl)ammonium hydroxyphenyltris(pentafluorophenyl)borate (amounting to 0.070 mmoles based on boron) and 0.110 ml of a 1.9 M toluene solution of triethyl aluminum (0.058 mmoles) were added along with 0.290 ml additional toluene. The mixture was stirred for 5 minutes on a mechanical shaker. About one half (0.550 ml) of the resulting solution was added to a flask containing 0.500 g of thoroughly dried silica (Grace-Davison 948 silica, heated 250 °C, 4 h). The mixture was shaken by hand to break-up clumps and then mechanically agitated for an additional 10 minutes. Next 8 ml of mixed hexanes was added to form a slunk, which was mechanically stirred for an additional 15 minutes. To this mixture, 3.5 ml of a 0.005 M toluene solution of rao-diisopropylamidoborane-bis-Ti’-(2-methyl-4-phenylinden-1 -yl)zirconium TI'‘-I ,4-diphenyl-1,3-butadiene (Example 14) was added. The mixture was agitated 2 h on the mechanical shaker, filtered on a glass frit, washed (3x) with 10 ml mixed hexanes and dried under reduced pressure. The resulting blue colored, dried, supported catalyst was analyzed by neutron activation for zirconium content and found to contain 31.8 female zirconium/g formulated supported catalyst. Solution Polvethvlene Polymerization Mixed hexanes and 1-octene were purified by sparging with purified nitrogen followed by passage through columns containing alumina (A-2, available from Larches Inc.) and Q5 reactant (available from Engelhard Chemicals Inc.) at 50 psig using a purified nitrogen pad. All transfers of solvents and solutions described below were accomplished using a gaseous pad of dry, purified nitrogen or argon. Gaseous feeds to the reactor were purified by passage through columns of A-204 alumina (available from Larches Inc.) and Q5 reactant. The alumina were previously activated by treatment at 375°C with nitrogen and Q5 reactant was activated by treatment at 200**C with 5 percent hydrogen in nitrogen. Batch reactor polymerizations were conducted in a two liter Parr reactor equipped with an electrical heating jacket, internal serpentine coil for cooling, and a bottom drain valve. Pressures, temperatures and block valves were computer monitored and controlled. Mixed alkanes solvent (about 740 g) and 1-octene (118 g) were measured in a solvent shot tank fitted with a differential pressure transducer or weigh cell. These liquids were then added to the reactor from the solvent shot tank. I ne contents of the reactor were stirred at 1200 rpm. Hydrogen was added by differential expansion (A 25 psi, 170 kPa) from a 75 ml shot tank initially at 300 psig (2.1 Mpa). The contents of the reactor was then heated to the desired run temperature under 500 psig (3.4 Mpa) of ethylene pressure. The catalyst composition (as a 0.0050 M solution in toluene) and cocatalyst were combined in the desired ratio in the glove box and transferred from the glove box to the catalyst shot tank through 1/16 in (0.16 cm) tubing using toluene to aid in the transfer. The catalyst tank was then pressurized to 700 psig (4.8 Mpa) using nitrogen. After the contents of the reactor had stabilized at the desired run temperature of 140°C, the catalyst was injected into the reactor via a dip tube. The temperature was maintained by allowing cold ethylene glycol to pass through the internal cooling coils. The reaction was allowed to proceed for 15 minutes with ethylene provided on demand. Additional injections of catalyst composition prepared and injected in the same manner were employed where indicated. The contents of the reactor were then expelled into a 4 liter nitrogen purged vessel and quenched with isopropyl alcohol. Approximately 10 ml of a toluene solution containing approximately 67 mg of a hindered phenol antioxidant (Irganox" from Ciba Geigy Corporation) and 133 mg of a phosphorus stabilizer (Irgafos*’ 168 from Ciba Geigy Corporation) were added. Volatile materials were removed from the polymers in a vacuum oven that gradually heated the polymer to MO'‘C ovemight and cooled to at least 50**C prior to removal from the oven. After completion of the polymerizaiton, the reactor was washed with 1200 ml of mixed hexanes solvent at 150°C before reuse. Results are contained in Table 1. * density is determined by displacement technique using methylethylketone ** micro melt index technique, calibrated using standards of known melt index, ‘ methylbis(octadecyl)ammonium tetrakis(pentafluorophenyl)borate (this ammonium cation is derived from a mixture of amines available commercially as methylbistallowamine). ‘ methylbis(octadecyl)ammonium bis(tris(pentafluorophenyl)aluminane)undecylimidazolide (prepared according to USSN 09/251,664, filed Feb. 17,1999) ‘ tris(pentafluorophenyl)borane, (C6F5)3B '‘ tris(pentafluorophenyl)aluminane, (C6F5)3AI ‘' methylalumoxane available from Albemarle Corp. Solution PolvproDVlene Polymerization The above reaction conditions were substantially repeated excepting about 625 g of mixed alkanes solvent and either 150 g of propylene (P) for homopolymer formation, or a mixture of 150 g propylene and 7 g ethylene (E) for copolymer formation were used. Hydrogen was added as a molecular weight control agent by differential pressure expansion from a 75 ml addition tank at about 17-25 psi (120-170 kPa). The reactor was heated to the polymerization temperature and the desired metal complex along with a cocatalyst, as dilute solutions in toluene, were mixed at an appropriate molar ratio, transcended to a catalyst addition tank, and injected into the reactor (three injections of 1 ‘imole, 3 ‘amole and 5 ‘mole based on zirconium over about 30 minutes for run 16, two injections of 5 ‘imole based on zirconium over about 20 minutes for run 17, and a single addition for all other runs. Results are contained in Table 2. ‘, methyldi(octadecyl)ammoniumtris(pentafluorophenyl)(p-(diethylaluminoxyphenyl) borate (funned by reaction of triethylaluminum and methyldi(octadecyl)ammonium tris(pentafluorophenyl)(hydroxyphenyl) borate) ‘ methylbis(octadecyl)ammonium bis(tris(pentafluorophenyl)aluminane)undecylimida2olide Slunk Polymerization The previous reaction conditions were substantially repeated excepting a supported catalyst was employed, the temperature was between 20-C and 60 -C, and no solvent was used. All feeds were passed through columns of alumina and a decontaminant (0-5"® catalyst available from Engelhard Chemicals Inc.) prior to introduction into the reactor. Catalyst and cocatalysts were handled in a glovebox containing an atmosphere of argon or nitrogen. A stirred 2.0 liter reactor was charged with about 500 g of propylene. Hydrogen was added by differential pressure expansion from a 75 ml addition tank at 40 psi (280 kPa). The reactor was adjusted to the initial polymerization temperature (25 -C) and a slunk of the supported catalyst composition (40 tag, 1.27 emote Zr) in mixed hexanes was injected into the reactor. The temperature was maintained at 25 -C for 20 minutes then increased to 60 -C over 6.5 minutes (2.8 minutes for run 33) and maintained at 60 -C for a total run time of 40 minutes. Upon completion, the reactor contents were removed and about 10 ml of a toluene solution containing approximately 67 mg of a hindered phenol antioxidant (Irganox™ 1010 from Ciba Geigy Corporation) and 133 mg of a phosphorus stabilizer (Irgafos"‘ 168 from Ciba Geigy Corporation) were added. The polymer was recovered by drying in a vacuum oven set at 140 °C for about 20 hours. Results are contained in Table 3. CLAIMS 1. A Group 4 transition metal complex nonexpanding to one of the following formulas: or a dimer thereof, wherein: M is titanium, zirconium, or hafnium in the +4, +3, or +2 oxidation state; Y1 and Y2 are independently an anionic, cyclic or non-cyclic, 7c-bonded group, NR\PR1;NR12orPR12; Z is boron or aluminum; Q is a neutral, anionic or dianionic ligand group depending on the oxidation state of M; j is 1. 2 or 3 depending on the. oxidation state of M and the electronic nature of Q; T independently each accidence is: R’ is independently each accidence hydrogen, a hydrocarbyl group, a tri(hydrocarbyl)silyl group, or atria(hydrocarbyl)silyl hydrocarbyl group, said Regroups containing up to 20 atoms not counting hydrogen; R5 is R1 or N(R')2; and two R1 groups together or one or more R1 groups together with R1 may optionally be joined to form a ring stmcture. 2. A metal complex according to claim 1 corresponding fondle 4,5,6,7, 8 or 9: wherein M. Z, T, R\ Q and j are as defined in claim 1; R’ is hydrogen, or a hydrocarbyl, halohydrocarbyl, dihycrocarbylamino-hydrocarbyl, tri(hydrocarbylsilyl)hydrocarbyl, Si(R’)3, N(R’)2. or’ group of up to 20 carbon or silicon atoms, and optionally two adjacent R’ groups can be joined together, thereby forming a fused ring structure; and R’ is independently hydrogen, a hydorcarbyl group, a trihydrocarbylsilyl group or a trihydrocarbylsilylhydorcarbyl group, said R’ having up to 20 atoms not counting hydrogen. 3. A metal complex according to claim 2 wherein M is in the +4 oxidation state, j = 2 and Q Independently each occurrence is halide, hydride, hydrocarbyl, silylhydrocarbyl, hydrocarbyloxide, or dihydrocarbylamide, said Q having up to 20 atoms not counting hydrogen, or two Q groups together form an alkanediyl group or a conjugated CA’ diene ligand that together with M form a metaliocyclopentene. 4. A metal complex according to claim 2 wherein M is in the +3 oxidation state, j" 1 and Q is either 1) a monovalent anionic stabilizing ligand selected from the group consisting of alkyl, cycloalkyi, aryl, silyl, amido, phosphide, alkoxy, aryloxy, sulfide groups, and mixtures thereof, said Q being further substituted with an amine, phosphine, ether, or thioethers containing substituent able to form a coordinate- covalent bond or chelating bond with M said ligand having up to 50 atoms not counting hydrogen; or 2) a C3-10 hydrocarbyl group comprising an ethylenic unsaturation able to fonn an -bond with M. 5. A metal complex according to claim 2 wherein M is in the +2 oxidation state, j = 1 and Q is a neutral conjugated diene, optionally substituted with one or more tri(hydrocarbyl)silyl or tri(hydrocarbylsilyl)hydrocarbyl groups, said Q having up to 40 carbon atoms and forming a n-complex with M. 6. A metal complex according to claim 3 corresponding to Formula 4a, 5a, 6a, 7a, 8a, or 9a, wherein the definitions of M, Z, R\ R’, and R’ are as defined in claim 3: and Q, independently each occurrence is a halide, hydrocarbyl, hydrocarbyloxy, or dihydrocarbylamide group of up to 10 atoms not counting hydrogen, or two Q groups together fonn a C4-20 diene ligand that together with M forms a metallocyclopentene. 7. A metal complex according to claim 4 corresponding to Formula 4b, 5b, 6b, 7b, 8b, or 9b, wherein the definitions of M, Z, R\ R’, and R’ are as defined in claim 4: and Q, each occurrence is a monovalent anionic stabilizing Iigand selected from the group consisting of alkyl, cycloalkyi, aryl, and silyl groups, said group being further substituted with one or more amine, phosphine, or ether substituents able to form a coordinate-covalent bond or chelating bond with M, and said Q having up to 30 non-hydrogen atoms; or Q is a C3.10 hydrocarbyl group comprising an ethylenic unsaturation able to form an rf bond with M. 8. A metal complex according to claim 5 corresponding to Formula 4c, 5c, 6c, 7c, 8c, or 9c, wherein the definitions of M, Z, R\ R’, and R’ are as defined in claim 5: and Q, each occurrence is a neutral conjugated diene, optionally substituted with one or more tri(hydrocarbyl)silyl groups or trp(hydrocarbyl)silylhydrocarbyl groups, said Q having up to 30 atoms not counting hydrogen and funning a u-complex with M. 9. A metal complex according to claim 6, 7 or 8 wherein Z is boron. 10. A metal complex according to claim 6 or 8 wherein Z is boron, and in formulas 4a, 4c, 7a or 7c, M Is zirconium or hafnium and R' is methyl or isopropyl. 11. A metal complex according to claim 1 while is dimethylamidoborane-bis(Ti’-cyclopentadienyl)2irconium dichloride. dimethylamidoboranebis(Ti’-inden-1 -yl)zirconium dichloride. dimethylamidoborane-bis(Ti’-2-methyl-4-phenylinden-1 -yl)zirconium dichloride, dimethylamidoborane-bis(Ti’-2-etliyl-4-phenylinden-1 -yl)zirconium dichloride, dimethylamidoborane-bis(Ti’-2-isopropyl-4-phenylinden-1 -yi)zirconium dichloride, dimethylamidoborane-bis(Ti’-2-methyl-4-bis(3,5-trifluoromethyl)phenyllnden-1 -yl)2irconium dichloride, dimethylamidoborane-bis('n’-3-t-butyiinden-1 -yl)zirconium dichloride, diisopropylamidoborane-bis(Ti’"Cyclopentadienyl)zirconium dichloride, diisopropylamidoboranebis(Ti’-inden-1 -yl)zirconium dichloride, diisopropylamidoborane-bis(Ti’-2-methyl-4-phenyrmden-1-yl)2irconium dichloride, diisopropylamidoborane-bis('n’-2-ethyl-4-phenylinden-1-yl)zirconium dichloride, diisopropylamidoborane-bis(n’-2-isopropyl-4-phenylinden-1-yl)zirconium dichloride, diisopropylamidoborane-bis(n’-2-methyl-4-bis(3,5-trifluoromethyl)phenylinden-1-yl)zirconium dichloride, diisopropylamidoborane-bis(7i’-3-t-butylinden-1 -yl)zirconium dichloride, diphenylamidoborane-bis(Ti’"Cyclopentadienyl)zirconium dichloride, diphenylamidoboranebisC-q’-inden-l -yl)zirconium dichloride, diphenylamidoborane-bis(Ti®-2-methyl-4-phenylinden-1 -yl)zirconium dichloride, diphenylamidoborane-bis(Ti’-2-ethyl-4-phenylinden-1 -yl)2irconium dichloride, diphenylamidoborane-bis(Ti’-2-isopropyl-4-phenylinden-1 -yl)zirconium dichloride, diphenylamidoborane-bis(Ti’-2-methyl-4-bis(3,5-trifluoromethyl)phenylinden-1-yl)zirconium dichloride, diphenylamidoborane-bis(Ti’-3"t-butylinden-1 -yl)zirconium dichloride, dimethylamidoborane-bis(Ti’-cyclopentadienyl)zirconium 1,4-diphenyl-1,3-butadiene, dlmethylamidoboranebis(Ti’-inden-1 -yl)zirconium 1,4-diphenyl-1,3-butadiene, dimethylamidoborane-bis(Ti’-2-methyl-4-phenylinden-1'yl)zirconium 1,4-diphenyl-1,3-butadiene, dimethylamidoborane-bis(Ti’-2"ethyi-4-phenylinden-1 -yljzirconium 1,4Hdiphenyl-1,3-butadiene, dimethylamidoborane-bis(Ti’-2-isopropyl'4-phenylinden-1-yi)zirconlum 1,4-diphenyl-1,3-butadiene, dimethylamidoborane-bis(T|®-2-methyl-4-bis(3,5-trifluoromethyl)phenylinden-1 -yl)zirconium 1,4-diphenyl-1,3-butadiene, dimethylamidoborane-bis(Ti’-3-t-butylinden-1-yl)zirconium 1,4-diphenyl-1,3-butadiene, diisopropyiamidoborane-bis(Ti’-cyclopentadienyl)zirconium 1,4-diphenyM ,3-butadiene, diisopropylamidoboranebis(7i’-inden-1-yl)zirconium 1,4-diphenyl-1,3-butadiene, diisopropylamidoborane-bis(Ti’-2-methyl-4-phenylinden-1-yl)zirconium 1,4-diphenyl-1,3-butadiene, diisopropylamidoborane-bis(Ti’-2-ethyl-4-phenylinden-1 -yl)zirconium 1,4-diphenyl-1,3-butadiene, diisopropyIamidoborane-bis(ri’-2-isopropyl-4-phenylinden-1 -yl)zirconium 1,4-diphenyl-1,3-butadiene, diisopropylamidoborane-bis(ii’-2-methyl-4-bis(3,5-trifluoromethyl)phenyllnden-1-yl)zirconium 1,4-diphenyl-1,3-butadiene, diisopropylamidoborane-bis(ii’-3-t-butylinden-1-yi)zirconium 1,4-diphenyl-1,3-butadiene, diphenylamidoborane-bis(7i’-cyclopentadienyi)zirconium 1,4-diphenyl-1,3-butadiene, diphenylamidoboranebis(Ti’-inden-1 -yl)zirconium 1,4-diphenyl-1,3-butadiene, diphenylamidoborane-bis(Ti’-2-methyl-4-phenylinden-1 -yl)zirconium 1,4-diphenyl-1,3-butadiene, diphenylamidoborane-bis(Ti’-2-ethyI-4-phenylinden-1 -yl)zirconium 1,4-diphenyl-1,3-butadiene, diphenylamidoborane-bis(T|’-2-lsopropyl-4- phenylinden-1-yl)zirconium 1,4-diphenyl-1,3-butadiene, diphenylamidoborane-bis(Ti’-2-methyl-4-bis(3,5-trifluoromethyl)phenylinden-1-yl)zirconium 1,4-diphenyl-1,3-butadiene, or diphenylamidoborane-bist-n’-S-t-butylinden-l -yl)zirconium 1,4-diphenyl-1,3-butadiene. 12. An polymerization process comprising contacting one or more addition polymerisable monomers under polymerization conditions with a catalyst composition comprising one or more metal complexes according to claim 1. 13. The process of claim 12 wherein the catalyst composition additionally comprises one or more activating cocatalysts. 14. The process of claim 12 conducted under solution, slurry or high pressure polymerization conditions- 15. The process of claim 13 conducted under slunk polymerization conditions, wherein the catalyst additionally comprises an inert, particulated support. A Group 4 utilisation metal complex substantially as hereinbefore described with reference to the accompanying drawings. An polymerization process substantially as hereinbefore described with reference to the accompanying drawings.

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