Derivatives of divalent germanium, tin, and lead. Part VIII. Tin(II) aryl-carboxylates, -sulphonates, and halide methoxides

Abstract

Tin(II) aryl-carboxylates, Sn[O₂CR]₂, and -sulphonates. Sn[O₃SR]₂, have been synthesised by reaction of the appropriate acid with tin(II) dimethoxide or bis(methylcyclopentadienyl)tin(II)(R = Me, Et, Ph, or Me-, Cl-, Br-, H₂N-, Bu^t-, O₂N-C₆H₄, C₆F₅, or C₁₀H₇). Tin(II) carboxylates, when soluble, are monomeric in benzene and in the vapour phase (mass spectra). The i.r. spectra suggest that the carboxylate ligand functions as a bridging group in the solid. The major fragmentation processes in the mass spectra involve stepwise loss of carboxylate groups and also decarboxylation. Tin(II) dimethoxide and tin(II) dihalides readily disproportionate in tetra-hydrofuran to yield tin(II) halide methoxides. Tin-119m Möossbauer data are reported for all compounds.