Enthalpic Pairwise Interactions between Some Amino Acids and 2-Butanone in Aqueous Solutions at 298.15 K

Abstract

The enthalpies of dilution of aqueous solutions of six kinds of amino acids (glycine, l-α-alanine, l-γ-aminobutyric acid, l-α-valine, l-α-serine, and l-α-threonine) with 2-butanone and enthalpies of mixing were measured at 298.15 K, using a mixing-flow microcalorimeter. The experimental data were treated according to the McMillan−Mayer theory, to obtain the enthalpic interaction coefficients. Combining the enthalpic pairwise interaction coefficients (hxy) of amino acids with cyclohexanone from the literature, the experimental results have been discussed from the point of view of solute−solute and solute−solvent interactions.