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Effect of the composition of a water-alcohol solvent on the thermodynamics of dissolution of DL-α-alanyl-β-alanine at 298.15 K

  • Physical Chemistry of Solutions
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Abstract

Enthalpies of solution for DL-α-alanyl-β-alanine in H2O-ethanol, H2O-1-propanol, and H2O-2-propanol mixed solvents with the alcohol mole fraction x 2 = 0–0.3 are measured at 298.15 K. Standard enthalpies of solution (Δsol H ∘), standard enthalpies of transfer of DL-α-alanyl-β-alanine from water to binary solvent (Δtr H ∘), and coefficients of enthalpies of pair interactions with alcohol molecules (h xy ) are calculated. The effect the structure and properties of alcohols and the composition of a water-alcohol mixture have on the enthalpy of dissolution for DL-α-alanyl-β-alanine are discussed. The h xy values for dipeptides of the alanine series in water-alcohol binary solvents are compared.

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Authors and Affiliations

  1. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, 153045, Russia

    V. I. Smirnov & V. G. Badelin

Authors
  1. V. I. Smirnov
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  2. V. G. Badelin
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Correspondence to V. I. Smirnov.

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Original Russian Text © V.I. Smirnov, V.G. Badelin, 2014, published in Zhurnal Fizicheskoi Khimii, 2014, Vol. 88, No. 12, pp. 1922–1926.

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Smirnov, V.I., Badelin, V.G. Effect of the composition of a water-alcohol solvent on the thermodynamics of dissolution of DL-α-alanyl-β-alanine at 298.15 K. Russ. J. Phys. Chem. 88, 2087–2090 (2014). https://doi.org/10.1134/S0036024414120310

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  • DOI: https://doi.org/10.1134/S0036024414120310

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