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It is shown that the temperature dependence of the ultraviolet absorption spectra for water-sulfur dioxide solutions cannot be explained by the theories of Ley and Konig or Boyd-Campbell and Maass. Qualitative arguments show that the mechanism, (SO2)gas⇀lhdSO2+H2O⇀lhdcomplex⇀lhdH2SO3⇀lhdH++-HSO3⇀lhd2H++-2SO3, does explain the spectroscopic behavior of dilute sulfur dioxide solutions. A linear relation is reported between the heat of solution, calculated from vapor pressure data, and the smallest effective molecular diameter of several gases. Attempts to analyse the absorption spectra of the water-ethanol-sulfur dioxide solutions in terms of the separate systems, EtOH+SO2⇀lhdcomplex1 and (SO2)gas⇀lhdSO2+H2O⇀lhdcomplex2⇀lhdH2SO3⇀lhdH++-HSO3 are reported. These results are explained by the new liquid lattice theory.
P. A. D. de Maine (1957) studied this question.