Abstract
Solutions of Mg(ClO4)2, Ca(ClO4)2 and Sr (ClO4)2 have been studied at a variety of concentrations up to saturation by means of infrared absorption, Raman scattering and multinuclear n.m.r. spectroscopy. For solutions of Mg(ClO4)2 there was little ion association up to saturation but for the other two salts association to both solvent shared anion- cation complexes and contact anion-cation complexes was identified. The nature of the association process was probed by using line broadening for the quadrupolar nuclei 17O, 35Cl and 43Ca . The extent of association to solvent shared anion-cation complexes was found to increase in the series Mg2+ < Ca2+ < Sr2+.
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