Enthalpies of solution of l-threonine in aqueous alcohol solutions

Enthalpies of solution of l-threonine in aqueous solutions of isopropanol, 1,2-propanediol and propanetriol were measured and enthalpies of transfer of l-threonine from water to these solutions calculated. Endothermic interactions, partial dehydrations and the interaction between alkyl groups, dominate exothermic interaction between polar groups.