Patent ID: 7094723

Claim:
A catalyst comprising a complex having Formula I: wherein M is a metal selected from Groups 3 to 10 and the lanthanide series of the Periodic Table; R 1 , R 2 , R 3 , R 4 , and R 5 are independently hydrogen, C 1-10 alkyl, C 6-10 aryl, C 7-15 aralkyl, C 1-10 alkoxy, or C 1-10 alkylamino, or C 2-20 dialkylamino each of these groups optionally substituted with halogen, cyano, C 1-4 alkoxy, or C 1-4 alkyl; Y is sulfur, nitrogen, or phosphorus; and La and Lb are each independently an anionic or neutral ligand wherein La and Lb are optionally bridged together with an alkylene or heteroalkylene.