Patent ID: 8658796

Claim:
A complex of ruthenium represented by the formula wherein: X and X′ denote an anionic ligand selected independently from the group consisting of halogen, phenolate, perfluorophenolate, arylcarboxylate, alkylcarboxylate, perfluoroalkylcarboxylate, alkylsulfonate, arylsulfonate, or perfluoroalkylsulfonate; A denotes carbon with an R 5 group; R 1 denotes hydrogen, C 1 -C 5 alkyl, C 2 -C 5 alkenyl or C 3 -C 7 cycloalkyl; and R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 denote independently hydrogen, C 1 -C 25 alkyl, C 1 -C 25 perfluoroalkyl, C 5 -C 24 aryl, C 2 -C 25 alkenyl, C 3 -C 7 cycloalkyl, —NO 2 , —CN, —CHO, —COOH, —COOR″, —SO 2 R″, —SO 2 N(R″) 2 , or —COR″, wherein R″ is C 1 -C 5 alkyl, C 1 -C 5 perfluoroalkyl, or C 5 -C 24 aryl.