Darstellung und Struktur von Antimon(III)-tris(thiophosphinaten)

Preparation and Structure of Antimony (III) Tris (thiophosphinates) The title compounds are formed by the reaction of Sb(CH₃COO)₃ with thiophosphinic acids R₂P(?S)OH (R = CH₃ cyclo-C₆H₁₁, C₆H₅). The crystal and molecular structures of Sb((cyclo-C₆H₁₁)₂POS)₃ and Sb((C₆H₅)₂POS)₃ have been determined by single crystal X-ray methods. Sb^III is pyramidally coordinated to the oxygen atoms of the R₂POS ligands through short (primary) bonds with a mean length of 203 pm. The Sb? S distances of the mainly chelating ligands vary between 300 and 320 pm (secondary bonds). The lone electron pair is stereochemically active.