Cesium dimethyltetrachloroplatinate,a complex of dimethylplatinum(IV). Synthesis and some reductive elimination reactions involving the monomethylplatinum(II) complex as an intermediate |
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Authors: | V V Zamashchikov V G Popov S L Litvinenko |
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Institution: | (1) L. M. Litvinenko Institute of Physico-Organic Chemistry and Coal Chemistry, The Academy of Sciences of Ukraine, 70 ul. R. Luksemburg, 340014 Donetsk, Ukraine |
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Abstract: | The reduction of Pt(IV) complexes followed by the oxidative addition of dimethyl sulfate to Pt(II) affords Cs2PtMe2Cl4, a complex of dimethylplatinum(IV). On treatment with such nucleophiles as Cl–, Br–, I–, and PtCl4
2– in aqueous solutions at 368 K this complex undergoes reductive elimination to give MeX and PtIIMe as a transient species. The latter is further converted to methane upon protolysis, whereas in the presence of an oxidant (Na2PtCl6) it gives rise to the PtIVMe species. The kinetics of decomposition of Cs2PtMe2Cl4 in aqueous HCl-KCl systems (2M or 3M in Cl–; PtIVMe2] Cl–]) were studied. The reaction takes place as anS
N
2 attack of X– on the carbon atom of a methyl group located with thetrans position with respect to the aqua-ligand of the PtMe2Cl3(H2O)]– complex.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 389–395, February, 1993. |
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Keywords: | platinum (II) complexes reductive elimination |
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