Influence of the cation on the Raman spectra of 1 : 1 electrolytes in liquid ammonia

Abstract

The striking manner in which the anionic Raman spectra obtained from solutions of alkali metal salts in liquid ammonia are dependent upon the associated cation is illustrated for some cyanides, thiocyanates, nitrates, azides and nitrites. The resolved components of the complex bands are related to forms of ion-pair co-existing in the solutions and some interim assignments have been made. The component due to “free” solvated anion has been assigned and confirmed unambiguously with data from solutions in which the cation has been complexed by a cryptand ligand.