Doddrell, David and Charrier, Claude and Roberts, John D. (1970) Nuclear magnetic resonance spectroscopy. A stereospecific 3JCF coupling in the low-temperature 13C nmr spectrum of 1,1-difluorocyclohexane. Proceedings of the National Academy of Sciences of the United States of America, 67 (4). pp. 1649-1650. ISSN 0027-8424 http://resolver.caltech.edu/CaltechAUTHORS:DODpnas70b
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Abstract
The proton-decoupled 13C nmr spectrum of 1,1-difluorocyclohexane has been examined at room temperature and at -90 degrees C. There are only minor changes in the one-bond and two-bond carbon-fluorine scalar coupling constants at the lower temperature; however, the triplet observed for C-3 (3JCF = 4.7 Hz) collapses to a doublet (3JCF = 9.5 Hz) at -90 degrees C. It is proposed that only the equatorial fluorine is coupled with the C-3 carbon as the result of operation of a back-lobe orbital interaction.
| Item Type: | Article |
|---|---|
| Additional Information: | © 1970 by the National Academy of Sciences. Communicated August 10, 1970. Supported by the National Science Foundation. |
| Record Number: | CaltechAUTHORS:DODpnas70b |
| Persistent URL: | http://resolver.caltech.edu/CaltechAUTHORS:DODpnas70b |
| Alternative URL: | http://www.pnas.org/cgi/content/abstract/67/4/1649 |
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
| ID Code: | 7599 |
| Collection: | CaltechAUTHORS |
| Deposited By: | Tony Diaz |
| Deposited On: | 12 Mar 2007 |
| Last Modified: | 26 Dec 2012 09:33 |
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