Dielectric Properties and Molecular Structure of the Liquid Unsaturated Alcohols and their Mixtures with Tetrachloromethane.

V.A. Durov, I.Yu. Shilov

Russ. J. Phys. Chem., v. 72 (7), p. 1114-1119, (1998), translated to English from Zh. fiz. khim., v. 72 (7), p. 1245-1250 (1998)

ABSTRACT. The analysis of dielectric properties of the unsaturated monohydric alcohols (cis- and trans-3-methyl-2-pentene-5-in-1-ols and 3-methyl-1-pentene-4-in-3-ol) and their their mixtures with tetrachloromethane at all mixture composition and temperature intreval 253-313 K war performed. The quantitative description of the permittivity as well dipole correlation factor of alcoholols and their mixtures in the framework of the model of supramolecular structure taking into account the linear and cyclic aggregation of alcohols and their solavation by tetrachloromethane molecules are given. The thermodynamic and structural parameters of association and solvation processes was determined. It was established that in the cis- and trans-3-methyl-2-pentene-5-in-1-ols the chain-like associates have correlated states of the hydrogen bonds whereas in the chain-like associates of the 3-methyl-1-pentene-4-in-3-ol the states of H-bonds are noncorrelated and the role of cyclic aggregates is quite essential. An unified description of molecular nature of dielectric properties of a mixture in terms of generalized quasichemical models on the molecular-structural level was demonstrated.

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