Deuterium isotope effects in liquid—liquid phase diagrams: A review

Phase-separation temperatures Tp have been measured for the systems H2O+C6H5OH, H2O+ C6H5OD, H20+ CsD5OD, D20+ C6H50H, D2O+ C6H5OD, D2O+ C6DsOD, H2O+ (CH3)2CHCO2H and D2O+ (CH3)2CHCO2H. For water+ 2-methylpropanoic acid, the differences in the Tp-x curves for the exchange and no-exchange systems are striking. For water + phenol, on the other hand, the effect of deuterium-exchange reactions on the Tp-x curves is very small. The results for all systems are in accord with the qualitative predictions of the Rabinovich theory, which accounts for deuterium isotope effects in liquid-liquid phase diagrams in terms of hydrogen bond and London dispersion interactions. Molar excess enthalpies and molar excess volumes at 300.15 K are reported for the system water + 2-methylpropanoic acid. The results are compared with those for water + acetic acid.

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Deuterium isotope effects in liquid-liquid phase diagrams : methanol + n-hexane systems

Australian Journal of Chemistry ◽

10.1071/ch9821281 ◽

1982 ◽

Vol 35 (7) ◽

pp. 1281 ◽

Cited By ~ 7

Author(s):

JR Khurma ◽

DV Fenby

Keyword(s):

Hydrogen Bond ◽

Liquid Phase ◽

Phase Diagrams ◽

Isotope Effects ◽

Dispersion Interactions ◽

Deuterium Isotope Effects ◽

London Dispersion ◽

Critical Solution Temperatures

Liquid-liquid phase diagrams have been measured for the systems CH3OH+n-C6H14, CH3OH + n-C6D14, CH3OD + n-C6HI4 and CH3OD + n-C6D14. The upper critical solution temperatures of these systems are 306.70, 304.30, 307.59 and 304.84 K, respectively. The results are in accord with the qualitative predictions of the Rabinovich theory, which considers hydrogen bond and London dispersion interactions.

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Deuterium isotope effects in liquid–liquid phase diagrams of aniline+cyclohexane mixtures

Fluid Phase Equilibria ◽

10.1016/j.fluid.2005.10.002 ◽

2005 ◽

Vol 238 (2) ◽

pp. 169-173 ◽

Cited By ~ 1

Author(s):

Agnieszka Siporska ◽

Ewa Starościak ◽

Anna Makowska ◽

Jerzy Szydłowski

Keyword(s):

Liquid Phase ◽

Phase Diagrams ◽

Isotope Effects ◽

Deuterium Isotope Effects

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Mechanism of hydration and isomerisation of 4-ethylidene-2,6-di-tert-butyl-2,5-cyclohexadien-1-one. Kinetics, acid-base catalysis and solvent deuterium isotope effects

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19790110 ◽

1979 ◽

Vol 44 (1) ◽

pp. 110-122 ◽

Cited By ~ 2

Author(s):

Jiří Velek ◽

Bohumír Koutek ◽

Milan Souček

Keyword(s):

Aqueous Medium ◽

Rate Equation ◽

Kinetic Data ◽

Isotope Effects ◽

Base Catalysis ◽

Quinone Methide ◽

Reaction Products ◽

Acid Base ◽

Deuterium Isotope Effects ◽

Hydroxybenzyl Alcohol

Competitive hydration and isomerisation of the quinone methide I at 25 °C in an aqueous medium in the region of pH 2.4-13.0 was studied spectrophotometrically. The only reaction products in the studied range of pH are 4-hydroxybenzyl alcohol (II) and 4-hydroxystyrene (III). The form of the overall rate equation corresponds to a general acid-base catalysis. The mechanism of both reactions for three markedly separated pH regions is discussed on the basis of kinetic data and solvent deuterium effect.

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