Calculated and observed vibrational spectra of a linear chain, bent chain, and sheet polymer (α-bismuth pentafluoride, selenium dioxide, and tin tetrafluoride respectively)

Abstract

The observed vibrational spectra of bismuth pentafluoride, tin tetrafluoride, and selenium dioxide are assigned on the basis of single-crystal Raman studies and normal-co-ordinate analyses. In the case of the fluorides the nature of the vibrational modes is discussed in some detail. The Raman spectrum of gaseous selenium dioxide shows one strong band at 923 cm^–1.