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Enthalpies of solution of glycylglycine and diglycylglycine in aqueous alcohols at 298.15 K |
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| Authors: | Valeriy I Smirnov Valentin G Badelin |
| Institution: | aLaboratory of Thermodynamics of Solutions of Non-electrolytes and Biologically Active Substances, Institute of Solution Chemistry, Russian Academy of Sciences, 1 Akademicheskaya Street, 153045 Ivanovo Russia |
| Abstract: | The integral enthalpies of solution of glycylglycine and diglycylglycine in water–ethanol, water–n-propanol and water–i-propanol mixtures were measured at 298.15 K and alcohol mole fraction concentrations (x2) ranging up to 0.3 by calorimetry. The ΔsolH° and ΔtrH° vs. x2 were found to have extrema. Enthalpic coefficients of pairwise interactions (hxy) between peptide and alcohol molecules were positive and increased in the series ethanol, n-propanol, i-propanol. |
| Keywords: | Peptides Aqueous and alcoholic solutions Enthalpies of solution and transfer |
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