Patent ID: 7358209

Claim:
A transition metal complex having the following Formula A: wherein the monovalent groups R 1 and R 2 are independently selected from —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 (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 vanadium; E is phosphorus or arsenic; X is an anionic group, L is a neutral donor group; n is 1 or 2, 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.