Patent ID: 8884044

Claim:
A ruthenium complex having a chiral diphosphorus donor ligand for homogeneous catalysis having the general formula wherein ruthenium is present in the oxidation state +II, P(1)-P(2) is a chiral diphosphorus donor ligand, n is an integer which obeys n≧3, L D is at least one uncharged 2-electron donor ligand and is a solvent ligand from the group consisting of acetonitrile (CH 3 CN), diethyl ether, water, acetone, tetrahydrofuran, dioxane, pyridine, imidazole and thiophene, Z is a π-bonded anionic open, acyclic pentadienyl ligand, E − is an anion of an oxo acid or complex acid and L z is at least one anionic ligand, and the chiral diphosphorus donor ligand P(1)-P(2) has bidentate P-P coordination and forms a four- to six-membered ring with the ruthenium.