The reaction between carbonatobis(phosphine)platinum(II) complexes and triorganotin hydrides. Formation of Sn–PtIV bonds
Abstract
The triorganotin hydrides R3SnH (R = Ph, PhCH2, and o-, m-, or p-MeC6H4) react with [Pt(CO3)(PMe2Ph)2] in methanol to give the PtIV complexes cis,trans,cis-[PtH2(SnR3)2(PMe2Ph)2] and some similar complexes of PEt3, PMePh2, and diphos were obtained. In benzene the PtIV complexes lost hydrogen reversibly to form complexes such as trans-[Pt(SnR3)2(PMe2Ph)2], which may also be synthesised from the carbonate-complexes in benzene. The factors favourable to the isolation of the PtIV complexes are reported. The stereochemistries of the PtIV and PtII complexes were determined from 1H and 3 1P{1H}-n.m.r. spectra.