Synthesis and NMR spectroscopy of [PtH3(triphos)]+ and [Pt(AuPPh3)3(triphos)]+ crystal structure of [Pt(AuPPh3)3(triphos)]+ (triphos = CH3C(CH2PPh2)3)

Article abstract of DOI:10.1016/S0022-328X(97)00153-8

The platinum(IV) complex [PtH₃(triphos)]⁺ (1) is formed upon treatment of [PtCl₂(triphos-P, P′)] with NaBH₄. The complex 1 reacts with 3 equiv. of [AuCl(PPh₃)] to give the tetrahedral PtAu₃ cluster [Pt(triphos)(AuPPh₃)₃]⁺ (2). The complexes 1 and 2 are characterised by one-and two-dimensional multinuclear NMR spectroscopy. The platinum atom of 2 is bonded to the three phosphorus atoms of the triphos ligand and to three gold atoms giving a six-coordinate Pt atom. The cation has a crystallographically imposed threefold axis defined by the Pt atom and the centre of the Au₃ triangle. Some distances and angles: Au-Au 285.80(8), Pt-Au 262.99(8)pm, Au-P 226.9(3)pm, Pt-P 231.2(3), Au-Au-Pt 57.088(13)°, Au-Pt-Au 65.82(2)°.