Patent ID: 7144839

Claim:
A catalyst comprising: (1) a transition metal complex having the Formula wherein the monovalent groups R 2′ and R 2″ are independently selected from the group consisting of —R a , —OR b , —NR c R d , and —NHR e ; the monovalent groups R a , R b , R c , R d , and R e , and the divalent group R 3 are independently selected from the group consisting of (i) aliphatic hydrocarbon, (ii) alicyclic hydrocarbon, (iii) aromatic hydrocarbon, (iv) alkyl substituted aromatic hydrocarbon, (v) heterocyclic groups and (vi) heterosubstituted derivatives of said groups (i) to (v); and wherein the divalent group R 5 is selected from the group consisting of the divalent groups —R a′ —,—O—R b′ —, —O—R b′ —, —N—(R c ) R d′ —, —N(R c )—, —N(R c )—R d′ —N(R c )—, —Si(R c ) 2 —R a′ —Si(R c ) 2 —, and —Si(R c ) 2 —, the divalent groups R a′ , R b′ , and R d′ being independently selected from the group consisting of divalent (i) aliphatic hydrocarbon, (ii) alicyclic hydrocarbon, (iii) aromatic hydrocarbon, (iv) alkyl substituted aromatic hydrocarbon, (v) heterocyclic groups and (vi) heterosubstituted derivatives of said groups (i) to (v); M is a metal from Group 3 to 11 of the Periodic Table or a lanthanide metal; E is phosphorus or arsenic; X is an anionic group; L is a neutral donor group; y and z are independently zero or integers such that the number of X and L groups satisfy the valency and oxidation state of the metal M; and (2) an activator compound.