Thermochemistry of interactions of Na+ with benzo-15-crown-5 ether in acetonitrile-water mixtures at 298.15 K

Abstract

Enthalpies of dissolution of benzo-15-crown-5 ether (B 15C5) in mixtures of acetonitrile with water and in solutions of NaI and NaBPh 4 (I=0.05 mol dm -3) in these mixtures were measured at 298.15 K. From the obtained results and appropriate literature data, the thermodynamic functions of B 15C5/Na § complex formation in acetonitrile-water mixtures were determined. The enthalpies of transfer of the complex B15C5/Na § from pure acetonitrile to the examined mixttJres were calculated and are discussed.

Enthalpies and Entropies of Transfer of Electrolytes and Ions from Water to Mixed Aqueous Organic Solvents

“…Data for Bu 4 NBr at 283.15 e T/K e 323.15 259 were unavailable for consideration. Calorimetric data for sodium ion complexes are available 260 but have not been included.…”

Complex formation of crown ethers with cations in the (water+organic solvent) mixtures: Part IX. Thermodynamics of interactions of Na+ ion with benzo-15-crown-5 ether in {(1−x)DMA+xH2O} at T=298.15 K

“…To obtain the equilibrium constant of complex formation the conductometric titration was used [1][2][3][4][5][6][7] and calorimetric measurements were used to calculate the enthalpy effect of complex formation [1][2][3][4][5][6][7]16]. The water content in the (water + organic solvent) mixtures was 0.8 P x P 0.…”

Complex Formation of Crown Ethers and Cations in Water−Organic Solvent Mixtures: The Thermodynamic Functions of Complex Formation of Benzo-15-crown-5 with Na+ in Water + Ethanol at 298.15 K

“…34 Effect of SolWation of Sodium Ion and B15C5 on the Formation of B15C5/Na + in EtOH + H 2 O. In our previous paper, 35 the intention was to analyze the change in the solvation enthalpy, and the analysis was performed with the use of the transfer function from organic solvent to the mixture. Such an analysis in the case of EtOH + H 2 O is impossible due to the lack of values of some functions concerning the solvation in pure ethanol, which makes it impossible to calculate the transfer function from pure ethanol to the mixture.…”