Patent ID: 7115763

Claim:
A transition metal complex of a ligand of the formula wherein: Y is oxo, NR 12 or PR 12 Z is NR 13 , S or PR 13 ; each of R 1 , R 2 and R 3 is independently hydrogen, hydrocarbyl, substituted hydrocarbyl or a functional group; n is 0 or 1; each R 12 is independently hydrogen, hydrocarbyl, substituted hydrocarbyl or a functional group; each R 13 is independently hydrogen, hydrocarbyl, substituted hydrocarbyl or a functional group; and provided that any two of R 1 , R 2 and R 3 geminal or vicinal to one another taken together may form a ring; wherein said complex has the formula (L 1 ) x (L 2 ) y (L 3 ) z M (VIII), wherein L 3 is (I); z is 1 or 2; M is a transition metal of oxidation state q; y is an integer of 1 to 3; x=(q−z); each L 1 is independently a monodentate, monoanionic ligand, wherein at least one L 1 group is a ligand that may add to an olefin; and L 2 is a monodentate neutral ligand which may be displaced by an olefin, or an empty coordination site; or L 1 and L 2 taken together are a monoanionic, bidentate ligand into which an olefin molecule may insert between the ligand and M.