Interaction of Picrolonic AcidDihexyl Sulfoxide Associate
with Organic Solvents

O. A. Kolyadina*, Yu. G. Kuvatov**, and Yu. I. Murinov*

* Institute of Organic Chemistry, Ufa Scientific Center, Russian Academy of Sciences,
pr. Oktyabrya 71, Ufa, 450054 Bashkortostan, Russia
** Bashkortostan State Agricultural University, Ufa, Bashkortostan, Russia

Received May 23, 1996

Abstract—Interactions between the PA DHSO–squalane mixed phase (PA is picrolonic acid, and DHSO is
dihexyl sulfoxide) and various organic sorbates were studied. The complex formation constants (K*) between
the sorbates and the PA DHSO associate decrease along the series alcohols > chloroform > aromatic hydro-
carbons > CCl₄ > saturated hydrocarbons, which corresponds to decreasing sorbate polarities. The obtained K*
values are described by the equation log K* = 1.716 + 1.453E + 2.887Y + 4.068P, where E is the solvent polarity
parameter, Y is the permittivity parameter, and P is the polarizability parameter. The correlation coefficient
equals 0.991. The strongest correlation was observed between K* and permittivity values, which suggests that
dispersion interactions predominate in dissolution of the sorbates in the complex. The results of gas chromato-
graphic determinations of K* are corroborated by the data on the interaction constant between PA and DHSO
obtained by the distribution method.

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