Silicon-bridged transition metal compounds
OwnerHoward C. Welborn, Jr.inventor
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Abstract
Silicon-bridged transition metal compounds and their use as .alpha.-olefin polymerization catalysts are disclosed. A chiral silicon-bridged metallocene catalyst polymerizes .alpha.-olefins to high isotacity with a minimum of inversions at high rates of catalyst activity. The catalyst is easily made in high yields and readily separated from atactic meso forms.
Claims19
Racemic [1,1'-dimethylsilanylene-bis(3-methylcyclopentadienyl)] zirconium dichloride.
Racemic [1,1'-dimethylsilanylene-bis(indenyl)] zirconium dichloride.
Racemic [1,1'-(1,1,2,2-tetramethyldisilanylene)-bis(3-methylcyclopentadienyl)] zirconium dichloride.
Racemic [1,1'-(1,1,2,2-tetramethyldisilanylene)-bis(4,5,6,7-tetrahydroindenyl)] zirconium dichloride.
Racemic [1,1'-dimethylsilanylene-bis(3-trimethyl silanylcyclopentadienyl)] zirconium dichloride.
Racemic [1,1'-(1,1,2,2-tetramethyldisilanylene)-bis(3-trimethylsilanylcyclopentadi enyl)] zirconium dichloride.
Racemic [1,1'-(1,1,3,3-tetramethyldisiloxanylene)-bis(4,5,6,7-tetrahydroindenyl)] zirconium dichloride.
Racemic [1,1'-(1,1,2,2-tetramethyldisilanylene)-bis(4,5,6,7-tetrahydroindenyl)] zirconium dichloride.
Racemic [1,1'-(2,2-dimethyl-2-silapropylene)-bis(3methylcyclopentadienyl)] zirconium dichloride.
Racemic [1,1'-dimethylsilanylene-bis(3-methylcyclopentadienyl)] hafnium dichloride.
Racemic [1,1'-dimethylsilanylene-bis(indenyl)] hafnium dichloride.
Racemic [1,1'-dimethylsilanylene-bis(4,5,6,7-tetrahydroindenyl)] hafnium dichloride.
Racemic [1,1'-(1,1,2,2-tetramethyldisilanylene)-bis(3-methylcyclopentadienyl)] hafnium dichloride.
Racemic [1,1'-(1,1,2,2-tetramethyldisilanylene)-bis(4,5,6,7-tetrahydroindenyl)] hafnium dichloride.
Racemic [1,1'-dimethylsilanylene-bis(3-trimethyl silanylcyclopentadienyl)] hafnium dichloride.
Racemic [1,1'-(1,1,2,2-tetramethyldisilanylene)-bis(3-trimethylsilanylcyclopentadi enyl)] hafnium dichloride.
Racemic [1,1'-(1,1,3,3-tetramethyldisiloxanylene)-bis(4,5,6,7-tetrahydroindenyl)] hafnium dichloride.
Racemic [1,1'-(1,1,2,2-tetramethyldisilanylene)-bis(4,5,6,7-tetrahydroindenyl)] hafnium dichloride.
Racemic [1,1'-(2,2-dimethyl-2-silapropylene)-bis(3-methylcyclopentadienyl)] hafnium dichloride.
Dependencies are inferred from the claim text.