LOW-FREQUENCY VIBRATIONAL-SPECTRA OF BROMOANTIMONATES AND IODOANTIMONATES
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abstract
The Raman and farinfrared spectra of a dozen antimony halide complexes of formula SbX63, SbX52, Sb2X93 and SbX41 have been recorded and analyzed for X = Br and I. The stretching frequencies for the bromo complexes range from about 135 to 220 cm1 for external bonds and from about 110 to 130 cm1 for bridging bonds. For the iodo complexes the ranges observed are 138174 cm1 (external) and 87127 cm1 (bridging). Approximate force constants were calculated for the anions and these were compared to values previously determined for halobismuthates. In general, the ordering of the force constants was found to be SbBr>SbIBiBr>BiI. As was found for the bismuth complexes, the stretching force constants were greatest for bonds in the anions in which the largest number of other bonds were to bridging halogens. Copyright 1980 Heyden & Son Ltd