Complexes of elements of groups 9 and 10 with new chiral chelating bisphosphine monosulfide and monoselenide ligands

The chiral bisphosphine prepared from the reaction of (S)-α-methylbenzyl amine with two equivalents of chlorodiphenylphosphine can be oxidised by direct reaction with one equivalent of either of the elemental chalcogens sulfur or selenium to prepare new chiral monoxidised bisphosphines. These chiral ligands can be used to prepare complexes with group nine [Rh(I), Ir(I)] and group ten [Pd(II) and Pt(II)] metals. These complexes were characterised by spectroscopic and, in four cases, crystallographic techniques.