INFRARED SPECTROSCOPIC STUDIES OF CONCENTRATED AQUEOUS-ELECTROLYTE SOLUTIONS

Infrared spectra of the Od stretching vibration of isotopically dilute HDO molecules in aqueous solutions of Ni(ClO4)2 and Mg(ClO4)2 are presented. For all concentrations, the spectra comprise four components; those corresponding to HDO molecules interacting with the anion, in the cation coordination sphere, in solvent-shared ion pairs, and in the bulk. Band parameters are given for these bands, as are quantitative estimates of the distribution of these species at all concentrations.