CaltechAUTHORS
  A Caltech Library Service

Nuclear magnetic resonance spectroscopy. A stereospecific 3JCF coupling in the low-temperature 13C nmr spectrum of 1,1-difluorocyclohexane

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

[img]
Preview
PDF
See Usage Policy.

171Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:DODpnas70b

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

Repository Staff Only: item control page