Patent ID: 7638628

Claim:
A Ruthenium(II) complex of general formula (I) [RuXYL m L′] (I) wherein: X, Y, L, L′ can be: X, Y equal or different and be a halogen or a hydrogen; L ligands chosen from the groups consisting of a) a monodentate phosphine of general formula PR 1 R 2 R 3 where R 1 , R 2 and R 3 can be equal or different and be aliphatic or aromatic groups, b) a bidentate phosphine of general formula PR′ 2 (CH 2 ) x PR″ 2 with x equal to 2, 3 or 4 where R′ and R″ can be equal or different and be aliphatic or aromatic groups, c) an optically active diphosphine, and m can be equal to 1 or 2 with the proviso that m is equal to 1 when the ligand L is chosen from group b) or c) and equal to 2 when the ligand L is chosen from group a) and that in this case the ligands L can be equal or different; L′ is a bidentate ligand of 2-(aminomethyl)pyridine type of formula (II) where R 4 , R 5 can be equal or different and can be H, aliphatic or aromatic groups.