A vibrational-spectroscopic study of the SO₂−H₂O system

Abstract

Raman and infrared spectra of gaseous SO₂ and SO₂ dissolved in H₂O and D₂O have been recorded. Although the results are in general agreement with previous work, some new infrared data is presented, as well as results on the effect of phase and solvent change on the infrared and Raman spectra. Previous workers have used the technique of vibrational spectroscopy to investigate the structure of the pyrosulfite ion in solution. The present study indicates that it is difficult to make conclusive statements concerning the structure of this ion on the basis of present and previous work. Solutions containing the sulfite ion have also been studied. Spectral differences between previous studies have been investigated, and an earlier study by Bernstein is essentially substantiated, although the present work does indicate, some discrepancy in the 900–1100-cm⁻ region for this ion.