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 Pr 4 Sb 2 and Ph 4 Sb 2 were prepared by dehalogenation of the corresponding dioganoantimony bromides with magnesium in tetrahydrofuran. Mass spectra show that the distibanes Me 4 Sb 2 , Et 4 Sb 2 and i-Pr 4 Sb 2 react with air to yield the compounds of the formula R 4 Sb 2 O (R = Me, Et, i-Pr), which are assumed to be bis- (diorganoantimony)oxides. The species (Me 2 Sb) 2 O is also formed by hydrolysis of Me 2 SbBr. Ir and 1 H NMR data of this oxide confirm the proposed structure. The distibanes R 4 Sb 2 (R = Me, Et, Pr, Ph) react quantitatively with sulfur to yield the corresponding bis- (diorganoantimony)sulfides (R 2 Sb) 2 , as derived from ms, NMR and IH data. Ms data of the distibanes R 4 Sb 2 (R = Me, Et, i-Pr, Bu, Ph) are reported and discussed.