Patent ID: 8466307

Claim:
A compound of formula (I′): {[(diene)Ru(OOCR 2 ) 2 ] n (S) v } (I′) wherein n is 1 or 2; v is 0, 1 or 2; S is a coordinated molecule of a polar aprotic solvent or water; “diene” represents a linear or branched C 4 -C 15 hydrocarbon group comprising two carbon-carbon double bonds or a cyclic C 7 -C 20 hydrocarbon group comprising two carbon-carbon double bonds; and R 2 represents a branched C 2-18 alkyl group comprising in the α position a tertiary or quaternary carbon atom and/or in the β position a quaternary carbon atom; said group optionally comprising a OH, amino or ether functional group; said group being optionally substituted by a one phenyl group, the phenyl group being optionally substituted by one to five halogen atoms and/or by C 1-4 alkyl or alkoxyl groups; or a CHR 3 Ph group, wherein R 3 is a OH or NH 2 group and Ph is a phenyl group optionally substituted by one to five halogen atoms and/or by C 1-4 alkyl or alkoxyl groups.