Patent ID: 7034157

Claim:
An olefin polymerization catalyst precursor composition comprising a C s symmetric catalyst precursor characterized by the formula: wherein M is a transition metal selected from groups 8 to 10 of the Periodic Table; n is an integer of from 1 to 3; Q is a halogen or a C 1 to C 2 alkyl group; PY is a pyridinyl group, which are coordinated with M through the nitrogen atom of said pyridinyl group; R′ is a C 1 to C 20 hydrocarbyl group; R″ is a C 1 to C 20 hydrocarbyl group; A 1 is a monoaromatic group, which are substituted or unsubstituted; and A 2 comprises multiple aromatic groups, which are substituted or unsubstituted, wherein the C═N bonded groups are excluded from A 1 and A 2 .