Hypervalent diorganoantimony(III) fluorides via diorganoantimony(III) cations-a general method of synthesis

Abstract

Novel diorganoantimony(iii) fluorides containing ligands with pendant arms, R2SbF (5), (R)PhSbF (6) [R = 2-(2′,6′-iPr2C6H3NCH)C6H4], R′′2SbF (7) and (R′′)PhSbF (8) [R′′ = 2-(Me2NCH2)C6H4], were prepared via the ionic derivatives [R2Sb]+[PF6]- (1), [(R)PhSb]+[PF6]- (2), [R′′2Sb]+[SbF6]- (4) and [(R′′)PhSb]+[SbF6]- (obtained in situ) by treatment with [Bu4N]F·3H2O. The ionic species used as starting materials as well as [R′2Sb]+[PF6]- (3) [R′ = 2-(2′,4′,6′-Me3C6H2NCH)C6H4] were obtained from the corresponding bromides or chlorides and Tl[PF6] or Ag[SbF6]. The compounds were investigated by multinuclear NMR spectroscopy in solution, MS and IR spectroscopy in the solid state. The molecular structures of the ionic species 1·2CH2Cl2 and 3·2CHCl3 as well as of the fluorides 5-8 were determined by single-crystal X-ray diffraction.