Patent ID: 6864205

Claim:
A catalyst precursor represented by one of the formula selected from: where a is 1; T is a chemical moiety having 1 to 100 atoms, which can include hydrogen when a is equal to 1, and is a bridging group that bridges the Y atoms when a is equal to 2 to 5; M is an element selected from Groups 3 to 7 series of the Periodic Table of the Elements; Z is a coordination ligand; each L is a monovalent, bivalent, or trivalent anionic ligand; n is an integer from 1 to 6; m is an integer from 0 to 5; Y is nitrogen; J is nitrogen; wherein the ring to which J is part of is a five or six member ring; R can be independently hydrogen, or a non-bulky or a bulky substituent; and b is an integer from 0 to 20.