dimethyl selenide; solution; saturated vapor pressure; diagram of the state; activity coefficients; azeotrope; excess functions of mixing

The thermodynamic parameters were calculated. for the vapor-liquid equilibrium of “dimethylzinc-dimethyl selenide” system using the tensometric data obtained for high-purity dimethylzinc, dimethylselene and their equimolecular solution. For this purpose, the Wilson’s model, whose parameters were calculated by the activity coefficients of components in the azeotrope, were used. The calculation was made using the mathematical package MathCad 14.