Enthalpy characteristics of L-proline dissolution in certain water–organic mixtures at 298.15 K


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A thermochemical study of the processes of L-proline dissolution in aqueous solutions of acetonitrile, 1,4-dioxane, acetone, dimethyl sulfoxide, nitromethane and tetrahydrofuran at Т = 298.15 K in the range of organic solvent concentrations x2 = 0–0.25 mole fractions is performed. Standard values of the enthalpies of solution and transfer of L-proline from water to mixed solvent, and the enthalpy coefficients of pairwise interactions between L-proline and molecules of organic solvents, are calculated. The effect the composition of a water–organic mixture and the structure of organic solvents have on the enthalpy characteristics of L-proline dissolution and transfer is examined. The effect the energy properties of intermolecular interactions between components of a mixed solvent has on the intermolecular interactions between L-proline and molecules of cosolvent is estimated. The correlation between the enthalpy characteristics of L-proline dissolution and electron-donor properties of organic cosolvent in aqueous solutions is determined.

作者简介

V. Badelin

Krestov Institute of Solution Chemistry

Email: vis@isc-ras.ru
俄罗斯联邦, Ivanovo, 153045

V. Smirnov

Krestov Institute of Solution Chemistry

编辑信件的主要联系方式.
Email: vis@isc-ras.ru
俄罗斯联邦, Ivanovo, 153045

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