A Keggin-type polyoxotungstate-coordinated diplatinum(II) complex: Synthesis,characterization, and stability of the cis-platinum(II) moieties in dimethylsulfoxide and water

摘要

The synthesis of a Keggin-type polyoxotungstate-coordinated diplatinum(II) complex. [(CH3)4N]3[α-PW_(11)O_(39){cis-Pt(NH3)2}2], obtained by reaction of Keggin-type mono-lacunary polyoxotungstate, [α-PW_(11)O_(39)]~(7-), with cis-diarnminedichloroplatinum(II) in an aqueous solution is described. The complex was characterized by elemental analysis, thermogravimetric/differential thermal analysis (TG/DTA), Fourier transform infrared (FT1R), ultraviolet-visible (UV-vis), and solution ~1H, ~31)P, and ~(183)W nuclear magnetic resonance (NMR) spectroscopy. The two cis-platinum(II) moieties, [cis-Pt(NH3)2]~(2+), were coordinated each to two oxygen atoms in a mono-vacant site of [α-PW_(11)O_(39)]~(7-) with C_s symmetry, and the cis-conformation was highly stable in dimethylsulfoxide and water.