Supermolecular Structure on and Physico-chemical Properties of Liquid Systems. Dimethylsulfoxide-Trichloromethane Mixture

Russian J.Phys.Chem., v. 70(5). p. 818-824 (1996); translated to English from Zh.Fiz.Khim., v. 70(5). p. 801-807 (1996)

ABSTRACT. The supermolecular ordering of dimethylsulfoxide - trichloromethane mixtures has been studied in a wide temperature and a whole concentration intervals. Thermodynamic mixing functions (Gibbs energy, enthalpy, entropy, activity coefficients), permittivity, and Rayleigh ratios for isotropic and anisotropic light scattering are considered. A molecular model including the formation of the 1:1 and 1:2 molecular complexes as well as self-association of the dimethylsulfoxide was substantiated. A set of thermodynamic and structural parameters of the complex formation was obtained. The thermodynamic parameters of the complex formation was defined by the minimization procedure for the excess Gibbs energy of mixtures was applied for calculation of excess enthalpy and entropy as well as dielectric and optical properties of mixtures.The unified representation and analysis of thermodynamic, dielectric and optical properties of dimethylsulfoxide - trichloromethane mixtures in terms of generalized quasi-chemical models on the molecular-structural level was realised.

Laboratory of Solutions