en
Scientific article
English

Solute water interactions in the organic-phase of a biphasic system.1. Structural influence of organic solutes on the water-dragging effect

Published inJournal of the American Chemical Society, vol. 115, no. 21, p. 9632-9639
Publication date1993
Abstract

The ''water-dragging'' effect is characterized by the amount of water ''dragged'' into a water-insoluble organic solvent by a solute partitioning between water and this solvent.1 In this study, 62 structurally diverse compounds (ortho-, meta-, and para-substituted phenols, carboxylic acids, alcohols, amines, miscellaneous aprotic solutes, and diastereomeric ephedrines) were investigated. The results were analyzed by an equilibrium model and ''pressed in terms of the macroscopic stoichiometry of hydrates and an equilibrium constant of hydrate formation. The macroscopic stoichiometry of hydrates being close to one (range 0.5-1.5), a normalized equilibrium constant (log K(w)') was calculated for a stoichiometry fixed to a value of one. On this basis, the water-dragging effect was shown to be due primarily to the H-bond-donor acidity of solutes and secondarily to their H-bond-acceptor basicity. In addition, intramolecular effects (e.g., internal H-bonds) and solvent accessibility strongly modulate the water-dragging effect

Affiliation Not a UNIGE publication
Citation (ISO format)
TSAI, Ruey-Shiuan et al. Solute water interactions in the organic-phase of a biphasic system.1. Structural influence of organic solutes on the water-dragging effect. In: Journal of the American Chemical Society, 1993, vol. 115, n° 21, p. 9632–9639. doi: 10.1021/ja00074a031
Main files (1)
Article
accessLevelRestricted
Identifiers
ISSN of the journal0002-7863
454views
0downloads

Technical informations

Creation08/06/2010 1:48:58 PM
First validation08/06/2010 1:48:58 PM
Update time03/14/2023 4:00:39 PM
Status update03/14/2023 4:00:39 PM
Last indexation02/12/2024 7:11:34 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack