Synthesis and Structure of μ2-Oxobis(carboxylatotriarylantimony)

Resumo

Binuclear antimony compounds with a bridging oxygen atom [Ph₃SbOC(O)R]₂O (R = CF₂CF₃, CF₂CF₂CF₃), [(4-МеC₆H₄)₃SbOC(O)CF₂CF₃]₂O, [(3-FC₆H₄)₃SbOC(O)R]₂O (R = C₆F₅, CF₂CF₃) have been synthesized by reacting equimolar amounts of triarylantimony, carboxylic acid and tert-butyl hydroperoxide in diethyl ether. According to X-ray diffraction data, in the molecules of compounds obtained, the Sb atoms have a trigonal bipyramid coordination with carboxylate ligands and a bridging oxygen atom in axial positions. The intramolecular distances Sb···O with a carbonyl oxygen atom are less than the sum of the van der Waals radii of Sb and O by ~0.2–0.4 Å.