Raman spectroscopy of the acetates of sodium, potassium and magnesium at liquid nitrogen temperature

A comprehensive Raman spectroscopic study of the acetates of potassium, sodium and magnesium in the solid state have been made at both 298 and 77 K. Band separation of the C=O stretching region was not achieved in the 298 K spectra but was in the 77 K spectra. The CO stretching vibration is observed as a single band in both the 298 and 77 K spectra and its frequency is cation dependent. Single C–C stretching bands are observed for the acetates in the 77 K spectra. The OCO deformation vibrations were also cation dependent. Low frequency vibrations of magnesium acetate are observed at 338, 253 and 268 cm⁻¹ and are assigned to the MgO stretching vibration of the magnesium bisacetato complex. Low frequency bands were also observed for sodium acetate at 219, 277 and 288 cm⁻¹.