Isotope effects in aqueous systems. 13. The hydrophobic interaction. Some thermodynamic properties of benzene/water and toluene/water solutions and their isotope effects

Autor:	M. K. Dutta-Choudhury, Nada Miljevic, W. Alexander Van Hook
Rok vydání:	1982
Předmět:	Heavy water Chemistry Vapor pressure Inorganic chemistry General Engineering Analytical chemistry Context (language use) Toluene chemistry.chemical_compound Deuterium Kinetic isotope effect Physical and Theoretical Chemistry Solubility Benzene
Zdroj:	The Journal of Physical Chemistry. 86:1711-1721
ISSN:	1541-5740 0022-3654
DOI:	10.1021/j100206a046
Popis:	Henry's law constants, K/sub H/ = K/sup 0/ + K/sub 1/X, have been measured as a function of concentration for the water-rich and benzene-rich solutions C/sub 6/H/sub 6//H/sub 2/O and C/sub 6/H/sub 6//D/sub 2/O and for the water-rich solutions C/sub 6/D/sub 6//H/sub 2/O and C/sub 6/D/sub 6//D/sub 2/O at several temperatures The constants K/sup 0/ and K/sub 1/ are sensitive to temperature and to isotopic label. The vapor pressure results have been supplemented with measurements of the apparent molar volumes of the solutions listed above, as well as for H/sub 2/O/sup -/ and D/sub 2/O-rich solutions of toluene and deuteriotoluene, and with determinations of the solubilities and solubility isotope effects of the toluene solutions. The data have been interpreted in the context of the theory of isotope effects in condensed-phase systems. That analysis indicates that a significant dynamical vibrational coupling between solute and solvent normal modes occurs in these solutions. The result is of interest particularly as it pertains to models of the hydrophobic interaction.
Databáze:	OpenAIRE
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