Phenylantimony bis(monothioacetate); its preparation, structure and stability
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Phenylantimony bis(monothioacetate) has been prepared and fully characterised by single crystal X-ray diffraction. The crystals are triclinic, P1, with a 10.761(4), b 7.304(3), c 9.608(7) Å, a 112.84(5), β 102.57(5) and γ 100.17(5)°. The theioacetate groups bond primarily via sulphur (Sb-S 2.451, 2.471 Å) 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 Å) trans to the phenyl group give weak dimers in the solid state. Attempts to prepare Ph2SbSAc gave only mixtures of 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. © 1986.
author list (cited authors)
Hall, M., Sowerby, D. B., & Falshaw, C. P.