Enthalpy characteristics of L-proline dissolution in certain water–organic mixtures at 298.15 K
- Authors: Badelin V.G.1, Smirnov V.I.1
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Affiliations:
- Krestov Institute of Solution Chemistry
- Issue: Vol 91, No 1 (2017)
- Pages: 84-88
- Section: Physical Chemistry of Solutions
- URL: https://journals.rcsi.science/0036-0244/article/view/169143
- DOI: https://doi.org/10.1134/S0036024416120037
- ID: 169143
Cite item
Abstract
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.
About the authors
V. G. Badelin
Krestov Institute of Solution Chemistry
Email: vis@isc-ras.ru
Russian Federation, Ivanovo, 153045
V. I. Smirnov
Krestov Institute of Solution Chemistry
Author for correspondence.
Email: vis@isc-ras.ru
Russian Federation, Ivanovo, 153045