Thermochemical behaviour of crown ethers in the mixtures of water with organic solvents. Part IX. Effect of base–acid properties of {(1− x)AN+ xH2O} on the solution enthalpy of cyclic ethers in this mixed solvent at T =298.15K

Abstract: The enthalpies of solution of cyclic ethers: 1,4-dioxane, 12-crown-4 and 18-crown-6 in {(1− x)AN+ xH2O} have been measured over the whole mole fraction range at T = 298.15K. Based on the results obtained, the effects of base–acid properties of mixed solvent and the number of –CH2CH2– groups in cyclic ethers molecules on the solution enthalpy of cyclic ethers in {(1− x)AN+ xH2O} have been analyzed. [Copyright &y& Elsevier]