Patent ID: 7217675

Claim:
A catalyst system comprising an activator and a compound represented by the formula: LMX 2 or the formula (LMX 2 ) 2 wherein: each M is, independently, a Group 7, 8, 9, 10 or 11 transition metal; L is, independently, a tridentate or tetradentate neutrally charged ligand that is bonded to M by at least three nitrogen atoms; at least one of the nitrogen atoms is a central non-pyridinal nitrogen atom and is not bonded to its adjacent atoms by a multibond, at least two of the nitrogen atoms are terminal nitrogen atoms; at least one terminal nitrogen atom is part of a pyridinyl ring; at least one other terminal nitrogen atom is substituted with at least one C 3 –C 50 hydrocarbyl or halohydrocarbyl; the central nitrogen atom is bonded to at least two different carbon atoms; and each X is, independently, an anionic monodentate ligand or two X may join together to form a bidentate dianionic ligand.