Synthese von Tetraorganodistibanen und oxidative Spaltung zu Bis(diorganoantimon)oxiden und -Sulfiden/ Synthesis of Tetraorganodistibanes and Oxidative Cleavage to Bis(diorganoantimony) Oxides and Sulfides

Abstract

Abstract The tetraorganodistibanes Pr4Sb2 and Ph4Sb2 were prepared by dehalogenation of the corresponding dioganoantimony bromides with magnesium in tetrahydrofuran. Mass spectra show that the distibanes Me4Sb2, Et4Sb2 and i-Pr4Sb2 react with air to yield the compounds of the formula R4Sb2O (R = Me, Et, i-Pr), which are assumed to be bis- (diorganoantimony)oxides. The species (Me2Sb)2O is also formed by hydrolysis of Me2SbBr. Ir and 1H NMR data of this oxide confirm the proposed structure. The distibanes R4Sb2 (R = Me, Et, Pr, Ph) react quantitatively with sulfur to yield the corresponding bis- (diorganoantimony)sulfides (R2Sb)2, as derived from ms, NMR and IH data. Ms data of the distibanes R4Sb2 (R = Me, Et, i-Pr, Bu, Ph) are reported and discussed.