Abstract
Abstract A dihydroxoplatinum(II) compound, cis-[Pt(OH)2(PMe3)2]·nH2O (Me = methyl, n = 2–3; 1), has been characterized by 31P, 195Pt, 13C, and 1H NMR spectroscopy. The thermal stability of 1 was examined. The presence of several water molecules is required for the stabilization of 1. The solution equilibria and the reaction of 1 with aqueous hydrogen peroxide were observed by 31P NMR spectroscopy. The neutralization of 1 with several dicarboxylic acids afforded water-soluble phosphine complexes in quantitative yields. Exposure of 1 toward air gives the carbonatoplatinum(II), cis-[Pt(CO3)(PMe3)2]·2H2O. Its crystal structure determination has revealed that the carbonate anion forms four-membered ring with a platinum atom.
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