One-dimensional phosphinite platinum chains based on hydrogen bonding interactions and phosphinite tetranuclear platinum(II)-thallium(I) complexes

Abstract

The mononuclear pentafluorophenyl platinum complex containing the chelated diphenylphosphinous acid/diphenylphosphinite system [Pt(C6F5){(PPh2O)2H}(PPh2OH)] 1 has been prepared and characterised. 1 and the related alkynyl complex [Pt(C[triple bond, length as m-dash]CBut){(PPh2O)2H}(PPh2OH)] 2 form infinite one-dimensional chains in the solid state based on intermolecular O–H⋯O hydrogen bonding interactions. Deprotonation reactions of [PtL{(PPh2O)2H}(PPh2OH)] (L = C6F51, C[triple bond, length as m-dash]CBut2, C[triple bond, length as m-dash]CPh 3) with [Tl(acac)] yields tetranuclear Pt2Tl2 complexes [PtL{(PPh2O)2H}(PPh2O)Tl]2 (L = C6F54, C[triple bond, length as m-dash]CBut5, C[triple bond, length as m-dash]CPh 6). The structure of the tert-butylalkynyl derivative 5, established by X-ray diffraction, shows two anionic discrete units [Pt(C[triple bond, length as m-dash]CBut){(PPh2O)2H}(PPh2O)]− joined by two Tl(I) centres via Tl–O and Pt–Tl bonds. Despite the existence of Pt–Tl interactions, they do not show luminescence.