Complex formation of crown ethers with cations in the (water+organic solvent) mixtures. Part VI. Thermodynamic of interactions of Na+ ion with benzo-15-crown-5 ether in {(1−x)DMF+xH2O} at 298.15 K

Abstract

The equilibrium constants of complex formation of benzo-15-crown-5 ether with sodium cation in {ð1 À xÞDMF + xH 2 O} were calculated using conductometric measurements. The thermodynamic functions of complex formation, the transfer enthalpy of complex from DMF to mixed solvent and the influence of benzene ring on the process of complex formation were calculated and discussed together with the same function in {ð1 À xÞDMSO + xH 2 O}. A good relationship between the enthalpy and entropy of complex formation was observed.