Patent ID: 7189791

Claim:
A transition metal catalyst compound for oligomerization of an unsaturated monomer represented by the formula: LMX 2 or the formula (LMX 2 ) 2 wherein each M is independently a Group 7, 8, 9 or 10 transition metal; each L is, independently, a tridentate or tetradentate neutrally charged ligand that is bonded to M by three or four nitrogen atoms, where at least one of the nitrogen atoms is a central nitrogen atom and at least two of the nitrogen atoms are terminal nitrogen atoms, and at least two terminal nitrogen atoms are substituted with one C 3 –C 50 hydrocarbyl and one hydrogen atom or two hydrocarbyls wherein at least one hydrocarbyl is a C 3 –C 50 hydrocarbyl, and the central nitrogen atom is bonded to three different carbon atoms or two different carbon atoms and one hydrogen atom; and each X is independently a monoanionic ligand, or two X may join together to form a bidentate dianionic ligand.