Summary
The derivation by Snyder of polarity parameters from gas-liquid constants for 81 solvents has been re-examined. It is shown that the correction for the influence of the molecular size of the solvents and solutes by means of the Flory-Huggins entropy expression is more successful than the original correlation as carried out by Snyder. The correction for dispersive and/or entropic contributions to the free energy of transfer in the original treatment is found to be inadequate. However, the effect of various more refined treatments on the final polarity parameters P, xe. xd and xn is probably small.
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Poppe, H., Slaats, E.H. Some observatons on the derivations of solvent polarity factors from gas-liquid partition coefficients. Chromatographia 14, 89–94 (1981). https://doi.org/10.1007/BF02279518
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DOI: https://doi.org/10.1007/BF02279518