Abstract
Linear relationships between the partial molar excess Gibbs function of a solute methylene group, Δ G E(CH 2), and the average McReynolds constant, ΔI, and between Δ G E(CH 2) and the individual McReynolds constants were determined for a set of 55 liquid stationary phases. All these relationships were identical at the given level of statistical significance. An analysis of the relationships indicates that Δ G E(CH 2) and ΔI are equivalent criteria of polarity for liquid stationary phases and that polarity can adequately be characterized by a single criterion.
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