Collect. Czech. Chem. Commun. 1983, 48, 1237-1240

On the problem of empirical characteristics of a medium and their mutual relations

Vojtěch Bekárek and Marie Stolařová

Faculty of Sciences, Palacký University, 771 46 Olomouc


New parameters of polarity, acidity, and basicity of a medium, which are more suitable to characterize nonspectral solvent effects, were derived by dividing the Taft-Kamlet solvent parameters π*, α, and β by a function of the refractive index n, f(n) = (n2 - 1)/(2n2 + 1). The new parameters were used in evaluating the effect of the medium on reaction rates, equilibria, solubilities, hyperfine splitting constants in EPR spectra, fluorescence life time, free energy of dissolution of ions and ion pairs, and on the Snyder solvent factors of the elution strength in chromatography.