Patent ID: 7163991

Claim:
A method for olefin polymerization comprising combining one or more olefins with a catalyst system represented by the formula: wherein M is a metal; X is a halogenated aryloxy group; n is an integer from 1 to 4; y is 0 or 1; L is a Group 15 element; L′ is a Group 15 element; E is a Group 15 element; Z is a Group 15 element; R 1 and R 2 are independently a C 1 to C 20 hydrocarbon group, a heteroatom containing group having up to twenty carbon atoms, silicon, germanium, tin, lead, or phosphorous; R 3 is a hydrocarbon group, hydrogen, halogen, or heteroatom containing group; R 4 and R 5 are independently an alkyl group, aryl group, substituted aryl group, cyclic alkyl group, substituted cyclic alkyl group, cyclic arylalkyl group, substituted cyclic srylalkyl group or multiple ring system; R 6 and R 7 are independently an alkyl group, hydrogen, halogen, heteroatom, or hydrocarbyl group; and R* is a Group 14 atom containing group, hydrogen, halogen, or heteroatom containing group.