Standard Gibbs energies of transfer of halogenate and pseudohalogenate ions, halogen substituted acetates, and cycloalkyl carboxylate anions at the water|nitrobenzene interface

Abstract

The previously introduced three-phase electrode technique was used to determine the Gibbs energies of transfer of ClO₃ ⁻, BrO₃ ⁻, IO₃ ⁻, IO₄ ⁻, OCN⁻, SeCN⁻, CN⁻, N₃ ⁻, halogen substituted acetate anions Z_3−nCH_nCOO⁻ (Z = F,Cl,Br,I), and cycloalkyl carboxylate anions ((CH₂)_nCOO⁻, n = 3,…,7) at the water|nitrobenzene interface. Whereas the data for the small inorganic ions can easily be understood in terms of ion-dipole interactions, the data of the organic ions need consideration of charge delocalisation and its effect on the enthalpy and entropy of solvation.