Patent ID: 7056996

Claim:
A catalyst for olefin polymerization, comprising a Group 3–11 metal complex of a bidentate, tridentate, or tetradentate ligand, wherein said complex comprises at least one N-donor fragment of formula 1a or 2b; wherein: M is a Group 3–11 transition metal; R 3a-d are each, independently, H, F, Cl, Br, hydrocarbyl, substituted hydrocarbyl, fluoroalkyl, nitro, heteroatom connected hydrocarbyl or heteroatom connected substituted hydrocarbyl; and Ar 1a is an aryl or heteroaryl group substituted at one or both ortho positions by a group Q 2 ; wherein Q 2 is hydrocarbyl, substituted hydrocarbyl, heteroatom connected hydrocarbyl or heteroatom connected substituted hydrocarbyl.