Diorganotin Halide Carboxylates, Thiocarboxylates and Halide Haloacetates.

摘要

Twenty-eight inorganotin halide acetates, thioacetates, haloacetates and carboxylates, eighteen not previously reported, have been synthesized by the reaction between the diorganotin oxides and acid halides, and by transacyloxylation reactions between diorganotin halide acetates and carboxylic acids. Infrared in the 1/2000-1/200 cm range, proton and carbon-13 nmr and tin-119m Mossbauer data are interpreted in terms of acetoxy-bridged, trigonal bipyramidal tin in the solid phase with depolymerization occurring in solution where a dynamic equilibrium between diorganotin dihalide and dicarboxylate species is rapidly established. A new infrared absorption also appears at 1/100-1/125 cm to higher frequency of the Upsilon(asym)(CO2) which disappears on heating. A dimeric structure based upon four-membered Sn2O2 or Sn2OX rings in which carboxylate group oxygen atoms brige tin atoms of a second molecule leaving the C=O group free is proposed. The halide thioacetates are associated in the solid state but monomeric in solution. (Author)