Halogen Exchange in Platinum−Phosphine−Tin(II) Halide Systems. Characterization of the Novel PtI(SnCl3)[(2S,4S)-2,4-bis(diphenylphosphino)pentane] Complex

The investigation of the PtCl 2 (diphosphine) + SnI 2 and PtI 2 (diphosphine) + SnCl 2 systems of catalytic importance (where diphosphines are 2,3-bis(diphenylphosphino)butane and 2,4-bis(diphenylphosphino)pentane) by NMR in solution has been carried out. Novel PtI(SnCl 3 )(diphosphine) and PtI(SnCl 2 I)(diphosphine) complexes were formed as a consequence of the halide exchange reaction. The selective formation of PtI(SnCl 3 )[2,4-bis(diphenylphosphino)pentane] was observed in the reaction of PtCl 2 [2,4-bis(diphenylphosphino)pentane] and 0.5 SnCl 2 and 0.5 SnI 2 . PtI(SnCl 3 )[2,4-bis(diphenylphosphino)pentane], the first platinum complex which contains a chiral chelating diphosphine and SnCl 3 ligand, was structurally characterized by X-ray diffraction.