Patent ID: 7763758

Claim:
A ligand of formula wherein: R 1′ and R 1″ independently represent a hydrogen atom, a linear, branched or cyclic C 1 to C 10 alkyl or alkenyl group optionally substituted, wherein R 1′ and R 1″ , when taken separately, represent a hydrogen atom, a linear, branched or cyclic C 1 to C 9 alkyl or alkenyl group optionally substituted or a C 6 to C 10 aromatic group optionally substituted; or when taken together, form a saturated or unsaturated ring optionally substituted, having 5 to 12 atoms and including the carbon atom to which the R 1′ and R 1″ groups are bonded; R 2 and R 3 represent, simultaneously or independently, a linear, branched or cyclic C 1 to C 6 alkyl group optionally substituted, a phenyl or naphthyl group optionally substituted; or the groups R 2 and R 3 , taken together, form a saturated or unsaturated ring optionally substituted, having 5, 6 or 7 atoms and including the phosphorus atom to which the R 2 and R 3 groups are bonded; R 6 and R 7 represent, simultaneously or independently, a hydrogen atom, a linear or branched C 1 to C 4 alkyl group optionally substituted, a phenyl ring optionally substituted; R 6 and R 1 , taken together, may form a saturated or unsaturated heterocycle, optionally substituted and optionally containing one additional nitrogen or oxygen atoms, containing 5 or 6 atoms and including the carbon atoms and the N atom to which the R 6 or R 1 group are bonded respectively; and Q represents: a group of formula wherein n is an integer from 2 or 3, and R 4 and R 5 represent, simultaneously or independently, a hydrogen atom, a linear or branched C 1 to C 4 alkyl group optionally substituted, a phenyl ring optionally substituted; or two distinct R 4 and/or R 5 groups, taken together, form a C 5 to C 10 saturated ring optionally substituted including the carbon atoms to which each of the R 4 or R 5 group is bonded; or a group of formula wherein n is an integer from 1 to 3, and two distinct adjacent R 4 groups, taken together, form a C 5 to C 10 aromatic ring optionally substituted or a C 5 -C 12 ferrocenediyl optionally substituted, including the carbon atoms to which each of the R 4 group are bonded; or three distinct adjacent R 4 groups, taken together, form a naphthalene ring optionally substituted, including the carbon atoms to which each of the R 4 group are bonded.