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Aromatic Solvent Effect on Polarity and Proton-Transfer Equilibrium in Phenol-Triethylamine Systems

Pawełka Z., Kuc T.

Polish Journal of Chemistry

2001

Vol. 75, nr 6

845-855

Dipole moments of hydrogen-bonded complexes of 4-nitrophenol-triethylamine and 2,4,6-trichlorophenol-triethylamine have been determined in various aromatic solvents. On this basis, the Gibbs energy _GPT of the proton-transfer equilibrium has been estimated. The aromatic solvent effect on the proton transfer has been discussed in terms of two solvation contributions, arising from a local complex-aromatic molecules interaction and a long-range dielectric effect. The microstructure of the solvent near a complex has been taken into account, utilizing a dielectric model of two spherical solvent layers. The crucial effect of the size of the aromatic solvent molecules on _GPT has been simulated by variation of the thickness of the first solvation layer.

Resonanse assisted intramolecular hydrogen bond in Schiff bases

Dziembowska T.

Polish Journal of Chemistry

1998

Vol. 72, nr 2

193-209

The intramolecular hydrogen bond, the proton transfer equilibrium and related properties of Schiff bases are discussed.