Abstract

The diffusion coefficient of Tl+ ions, the standard potential, the size factor of the activated complex, and the standard rate constant of the overall reaction Tl(I)/Tl(Hg) in aqueous mixtures of acetone, methanol, acetonitrile, and dimethylformamide are related to parameters representing the composition, polarity, electron pair, and hydrogen-bond donor ability of these mixtures. The dependencies on mixture composition, and the linear and multilinear correlation with solvatochromic parameters are interpreted by assuming a heterosolvation effect in combination with a two-step ion transfer – ion adsorption mechanism.

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