Patent ID: 8680220

Claim:
A ligand having the general formula (VI): (R 9 )(R 10 )P—N(R 3 )—P(R 4 ) (VI) wherein: the R 9 and R 10 groups are independently selected from optionally substituted alkyl or heteroalkyl groups; the R 3 group is selected from hydrogen, a hydrocarbyl group, a substituted hydrocarbyl group, a heterohydrocarbyl group, a substituted heterohydrocarbyl group, a silyl group or derivative thereof; the R 4 group is an optionally substituted alkylenedioxy or alkylenedimercapto structure which is bound to the phosphorus atom through the two oxygen or sulphur atoms of the alkylenedioxy or alkylenedimercapto structure or an optionally substituted arylenedioxy or arylenedimercapto structure which is bound to the phosphorus atom through the two oxygen or sulphur atoms of the arylenedioxy or arylenedimercapto structure.