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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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.
|Additional Information:||© 1970 by the National Academy of Sciences. Communicated August 10, 1970. Supported by the National Science Foundation.|
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|Deposited By:||Tony Diaz|
|Deposited On:||12 Mar 2007|
|Last Modified:||26 Dec 2012 09:33|
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