Record Display for the EPA National Library Catalog


Main Title Interaction of Water with Organic Solute Species.
Author Liott, Charles L. ; Hopkins, Jr, H. P. ; Perdu, M. ;
CORP Author Georgia Inst. of Tech., Atlanta. Environmental Resources Center.
Year Published 1973
Report Number ERC-1473; DI-14-31-0001-3269; OWRR-B-049-GA; 03762,; B-049-GA(10)
Stock Number PB-227 250
Additional Subjects Organic ions ; Thermochemical properties ; Thiols ; Ionization ; Entropy ; Enthalpy ; Pyridines ; Anilines ; Solvation ; Gibbs free energy ; Thermodynamics ; Water ; Anilinium compounds ; Pyridinium compounds
Library Call Number Additional Info Location Last
NTIS  PB-227 250 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 153p
The report describes a detailed investigation of the relative contributions of the enthalpy and entropy of ionization to the Giggs free energies of ionization of substituted anilinium ions, pyridinium ions, and theiphenol. Enthalpies of ionization were determined calorimetrically in aqueous solution at 25C. Entropies of ionization were calculated from the experimental enthalpies and literature Gibbs free energies of ionization. In the case of thiophenol, the Gibbs energy was calculated from the pKa, which was determined spectrophotometrically in a standard buffer solution. The experimental data for substituted anilinium ions and pyridinium ions were also analyzed in terms of Hepler's theory of substituent effects. Theoretical and mechanistic explanations are discussed.