Isotope effect on miscibility of acetonitrile and water

The miscibility of four binary liquid mixtures containing acetonitrile (ACN, ACN-d 3) and water (H 2O, D 2O) has been studied. All the measured systems present solubility curves characterized by slight asymmetry and the presence of an upper critical solution temperature (UCST). It is found that all...

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Bibliographic Details
Published in:Fluid phase equilibria 1999-01, Vol.154 (1), p.79-87
Main Authors: Szydłowski, Jerzy, Szykuła, Marek
Format: Article
Language:English
Subjects:
Acetonitrile
Chemistry
Deuterium
Exact sciences and technology
Experiment
General and physical chemistry
Isotope
Liquid-liquid equilibria
Liquid–liquid
Miscibility data
Phase diagram
Phase equilibria
Water
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Summary:The miscibility of four binary liquid mixtures containing acetonitrile (ACN, ACN-d 3) and water (H 2O, D 2O) has been studied. All the measured systems present solubility curves characterized by slight asymmetry and the presence of an upper critical solution temperature (UCST). It is found that all systems have approximately the same critical composition and approximately the same shape of the phase diagrams. There is also no influence on the critical exponent. However, it has been found that isotope substitution diminishes solubility in each case independently of the site of deuterium substitution. This observation is accounted for in terms of the specific interactions of acetonitrile and water.
ISSN:0378-3812
1879-0224
DOI:10.1016/S0378-3812(98)00438-5