Thermochemical Isotope Effects II
CH₃OH-CH₃OD, C₂H₅OH-C₂H₅OD, and H₂O-D₂O in selected solvents
Standard heats of solution at 25° have been determined for the isotopic pairs methanol-methanol-d, ethanol-ethanol-d, and water-heavy water in a variety of solvents. In every case, the transfer of the deuterated compound from an inert solvent (in the case of water, from the gaseous state) to a hydrogen-bonding solvent is more exothermic than the transfer of the parent compound. The isotope effect on the enthalpy of transfer shows a rough correlation with the difference between the reduced masses of the solvent-solute pair. The isotope effect on the enthalpy of the O-H bond in methanol has also been determined.
W. C. Duer and G. L. Bertrand, "Thermochemical Isotope Effects II," Journal of the American Chemical Society, American Chemical Society (ACS), Jan 1975.
The definitive version is available at https://doi.org/10.1021/ja00847a003
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© 1975 American Chemical Society (ACS), All rights reserved.