Mechanistic models of the ion-solvation shell system

The eigenfrequencies of solvation shell oscillations with respect to the ion are estimated in various approximations describing the ion–solvation shell system. The results of comparisonwith experiments suggest that the most appropriate is the model in which the solvated ion is considered to be a spherical rotator formed either by the entire solvation shell or by a layer of solvent molecules adjacent to the outer boundary of the solvation shell.