Аннотация:Complexing of CaCl2 was studied in solns. contg. I (n = 1-5) and II (n = 4,45) by soln. calorimetry. Equil. consts. and enthalpies and entropies of 1:1 and 1:2 Ca:ligand complex formation were calcd. The stability const. of the 1:2 complex is usually larger than that of the 1:1 complex due to the higher enthalpy contribution to formation of the 1:1 complex and the higher entropy contribution to formation of the 1:2 complex.