Aqueous solutions containing amino acids and peptides. Part 8.—Gibbs free energy of interaction of some α,ω-amino acids with sodium chloride at 298.15 K

Abstract

Cells with transference have been used to obtain information on the free energy of interaction between sodium chloride and the amino acids β-alanine, γ-aminobutyric acid and ε-aminocaproic acid. The results obtained are compared with those obtained for some α-amino acids. It is shown that, whereas with the α-acids there is little change in the pairwise interaction parameter as the hydrocarbon side chain is extended, for the α,ω-acids the interaction with the ions of the salt becomes increasingly attractive as the homologous series is ascended.