RAMAN-SPECTRA OF ISOTOPIC BISULFITE AND DISULFITE IONS IN ALKALI SALTS AND AQUEOUS-SOLUTION

The Raman spectra of solid lithium, sodium, potassium, cesium, rubidium, and ammonium disulfite and of rubidium and cesium bisulfite were recorded and compared with the spectrum of an aqueous solution saturated with 1.2m K2S2O5. Deuterium, 34S8, and 18O2 were used to label cesium bisulfite, CsHSO3, cesium disulfite, Cs2S2O5, and potassium disulfite. All six fundamentals of the bisulfite ion were observed and assigned. Eleven of the fifteen expected fundamentals of the disulfite ion were observed and correlated to older experimental data, as well as recent calculations. Isotope shifts confirm assignments in the SO stretching region. In the low frequency region, assignment is less conclusive and two frequencies have been tentatively reassigned. © 1979.