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  Home > JCE Print > Journal of Chemical Education > Issues > 1996  > January  >
Laboratory Experiments
Gas-Phase NMR Study of the DCl-HBr Isotope Exchange Reaction
Joseph W. Nibler, Philip Minarik, William Fitts, and Rodger Kohnert
Oregon State University, Corvallis, OR 97331-4003
Cover
January 1996
Vol. 73 No. 1
p. 99
Abstract
A physical chemistry laboratory experiment is described in which proton and deuteron FT-NMR spectra are used to determine the equilibrium constant for the isotope exchange reaction

                DCl  +  HBr  <==>  DBr  + HCl
The measurement illustrates an unusual gas phase application of NMR spectroscopy. The results are in good accord with a 297K value of Kp = 0.818, calculated from statistical thermodynamics using vibrational-rotational constants. The latter can be taken from the literature or can be conveniently determined in a high resolution FTIR experiment commonly done in most physical chemistry laboratories.
More Information
*  Citation
 Nibler, Joseph W.; Minarik, Philip; Fitts, William; Kohnert, Rodger. J. Chem. Educ. 1996 73 99.
*  Keywords
*  History
 Created:
Last Updated:		 9/25/1999
5/22/2006
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