Enthalpy characteristics of the dissolution of L-valine in water/formamide mixtures at 298.15 K
- Authors: Smirnov V.I.1, Badelin V.G.1
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Affiliations:
- Krestov Institute of Solution Chemistry
- Issue: Vol 90, No 11 (2016)
- Pages: 2165-2169
- Section: Physical Chemistry of Solutions
- URL: https://journals.rcsi.science/0036-0244/article/view/168929
- DOI: https://doi.org/10.1134/S0036024416110261
- ID: 168929
Cite item
Abstract
The thermochemical dissolution of L-valine in solvent mixtures H2O + (formamide, N-methylformamide, and N,N-dimethylformamide) is studied at an organic component concentration of x2 = 0–0.35 molar fractions and a temperature of 298.15 K. The experimental data are used to calculate standard enthalpies of dissolution, the transferring of L-valine from water to a mixed solvent, and the enthalpy coefficients of pairwise interactions (hxy) with organic solvent molecules. The correlation between the enthalpy characteristics of the dissolution of L-valine with the composition of aqueous organic mixtures and the nature of the organic solvent (its physicochemical properties) is determined. A comparative analysis of the values of hxy of a number of aliphatic L-amino acids in similar solvent mixtures with the hydrophobicity parameters of their side chains is performed.
About the authors
V. I. Smirnov
Krestov Institute of Solution Chemistry
Author for correspondence.
Email: vis@isc-ras.ru
Russian Federation, Ivanovo, 153045
V. G. Badelin
Krestov Institute of Solution Chemistry
Email: vis@isc-ras.ru
Russian Federation, Ivanovo, 153045