Phenylantimony Bis(monothioacetate); Its Preparation, Structure and Stability

Article abstract of DOI:10.1016/0022-328X(86)80452-1

Phenylantimony bis(monothioacetate) has been prepared and fully characterised by single crystal X-ray diffraction.The crysatals are triclinic, P1, with a 10.761(4), b 7.304(3), c 9.608(7) Angstroem, α 112.84(5), β 102.57(5) and γ 100.17(5) grad.The thioacetate groups bond primarily via sulphur (Sb-S 2.451, 2471 Angstroem) but substantial Sb...O interactions lead to a bis-chelate structure.Isolated PhSb(SAc)2 molecules have distorted square-pyramidal geometry with an apical phenyl group but intermolecular Sb...S interactions (3.802 Angstroem) trans to the phenyl group give weak dimers in the solid state.Attempts to prepare Ph2SbSAc gave only mixtures PhSb(SAc)2 and Ph3Sb; in the related acetate series, Ph2SbOAc is well-known, but PhSb(OAc)2 could not be prepared.Possible reasons for the instability of Ph2SbSAc and PhSb(OAc)2 are considered.