Patent ID: 7253133

Claim:
A catalytic system for olefin polymerization or copolymerization comprising a catalyst having the following formula: wherein: A, B, D, E, G, and connecting bonds comprise a tridentate ligand; and wherein A represents a metal-coordinating moiety selected from the group consisting of an oxygen atom-containing moiety, a sulfur atom-containing moiety, a selenium atom-containing moiety, a nitrogen atom-containing moiety, and a phosphorus atom-containing moiety; B represents a chemically inert moiety selected from the group consisting of a nitrogen atom-containing moiety, a phosphorus atom-containing moiety, and a substituted or unsubstituted hydrocarbyl moiety; D represents O, S, Se, or a metal-coordinating moiety selected from the group consisting of an oxygen atom-containing moiety, a nitrogen atom-containing moiety, a sulfur atom-containing moiety, and a selenium atom-containing moiety; E represents a metal-coordinating moiety selected from the group consisting of an oxygen atom-containing moiety, a sulfur atom-containing moiety, a selenium atom-containing moiety, a nitrogen atom-containing moiety, and a phosphorus atom-containing moiety; G represents a chemically inert substituted or unsubstituted phenylene group bridging D and E through R 1 , R 2 , and R 3 each individually represents hydrogen or a chemically inert substituted or unsubstituted hydrocarbyl moiety, R 1 and R 2 being optionally linked to form a ring; R 18 , R 19 , R 20 , R 21 , each independently represents hydrogen, halogen, a chemically inert substituted or unsubstituted hydrocarbyl moiety; M represents a transition metal selected from Group III to Group XI, M being linked to each of A, D, and E by a covalent or a coordinate covalent bond; X represents a weakly coordinating monovalent ligand; d is 1; q is 0 or 1; m is 1, 2 or 3; and n is 1, 2, 3 or 4 as needed to balance the charge on M.