Synthesis and spectroscopic studies of di-<em>s</em>-and <em>t</em>-butyltin(IV) carboxylates

861-864Di-s- and t-butyltin(IV) carboxylates, [BuSn(OOCAr)2] (x = sec. or tert.; Ar = C6H5, C6H4OMe-2, 2-C4H3O, 2-C4H3S, 2-C5H4N, 2-C9H6N and 2-C4H3N2) have been prepared and characterized. Carboxylate moiety acts in a bidentate fashion either by coordination through both the oxygen atoms in an asymmetrical manner or chelating through nitrogen in case of ligands containing nitrogen heterocycles. Spectroscopic data (IR and NMR) suggest that these compounds adopt a six-coordinate configuration in solution

Synthesis and characterization of dibutylgermanium(IV) dialkylthiophosphates

809-810The reaction of dibutylgermanium dichloride with two molar equivalents of ammonium dialkylthiophosphates in benzene. yields dibutylgermanium bis(dialkylthiophosphates), [Bu”2Ge{(OSP(OR)2}2] (R=Et, Pr", Pr', Bu").The latter complexes have been characterized by phosphorus analysis, IR and NMR (1H, 13C and 31P) data. The spectroscopic data suggest that these complexes contain four-coordinate germanium with monodentate dialkylthiophosphate ligand