A thermochemical study of the solid-state coordination reactions of two α-amino acids with copper(II) acetate

The two solid-state coordination reactions(1)CuAc2·H2O(s)+2Ala(s)→trans-Cu(Ala)2(s)+2HAc(l)+H2O(l)(2)CuAc2·H2O(s)+2Gly(s)→trans-Cu(Gly)2·H2O(s)+2HAc(l)have been studied by solution calorimetry. The molar dissolution enthalpies of the reactants and the products in some solvents (such as 2 mol l−1 HCl or its solutions) of these solid–solid coordination reactions have been measured by an isoperibol solution calorimeter. The standard molar formation enthalpies of [trans-Cu(Ala)2(s), 298.15 K] and [trans-Cu(Gly)2(s), 298.15 K] have been determined to be −1015.42 ± 0.06 and 1252.36 ± 0.05 kJ mol−1, respectively, from the results of the molar dissolution enthalpies and other auxiliary thermodynamic data.