Аннотация:Complexation of CaCl2 and Ca(NO3)3 with 15-crown-5 and 12-crown-4 in ethanol was studied calorimetrically at 298 K. The heats of soln. were detd. in EtOH and MeOH. The heats, entropies and free energies, and log K (equil. consts.) were calcd. for the complexation reaction Ca2+ + L .dblharw. CaL2+, with L being a crown ether.