Ionic solvation in methanol + water mixtures. Free energies of transfer from water
- 1 January 1973
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 69, 984-992
- https://doi.org/10.1039/f19736900984
Abstract
The free energy of transfer ΔG° t(H+) of the solvated proton from water to methanol + water mixtures up to 50 % w/w methanol is considered as the sum of two processes, the transfer of a tetrahedral aquo-proton from water into the mixture using the Born expression and the subsequent replacement of an H2O molecule in the tetrahedron by a methanol molecule according to the equilibrium, H+(H2O)4solv+ CH3OHsolv⇌ H+(CH3OH)(H2O)3solv+ water. These values for ΔG° t(H+) are subsequently used to derive values for ΔG° t(halide ion) from the ΔG° t for the appropriate hydrogen halides, and ΔG° t(Cl–) then used to produce values of ΔG° t for other cations from ΔG° t for simple salts. These values for ΔG° t for the single ions are discussed with respect to solvation of ions by H2O and CH3OH molecules and structural effects in the bulk solvent.Keywords
This publication has 0 references indexed in Scilit: