Published November 1, 1965
| public
Journal Article
Nitrogen-15 Magnetic Resonance Spectroscopy. IV. The Degenerate Bimolecular Exchange of Protons in Ketimines
Chicago
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Abstract
The imine protons of nitrogen-15 labeled ketimines exhibit temperature-dependent nuclear magnetic resonances. Analysis of the effect of concentration of substrate on the mean lifetime indicates that the spectral changes result from a bimolecular exchange of protons between imines. The activation energy of this process in diphenylketimine-^(15)N was determined to be 13.8 ± 2 kcal./mole, whereas in sec-butylphenylketimine-^(15)N the activation energy was about 6 kcal./mole. In the latter case, separate resonances were observed for the distinct syn and anti isomers.
Additional Information
© 1965 American Chemical Society. Received May 12, 1965. Part III, prepared for publication for the Symposium "N.M.R. in Chemistry: The Fifteenth Year," Academic Press Inc., New York, N. Y., in press. Supported in part by the Public Health Service Research Grant 11072-02 from the Division of General Medical Sciences, the Office of Naval Research, and the National Science Foundation. National Science Foundation Predoctoral Fellow, 1962-1965. National Science Foundation Undergraduate Fellow, Summer 1964.Additional details
- Eprint ID
- 61150
- Resolver ID
- CaltechAUTHORS:20151015-104904884
- U.S. Public Health Service (USPHS)
- 11072-02
- Office of Naval Research (ONR)
- NSF
- NSF Predoctoral Fellowship
- NSF Undergraduate Fellowship
- Created
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2015-10-16Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Other Numbering System Name
- Caltech Gates and Crellin Laboratories of Chemistry
- Other Numbering System Identifier
- 3228