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Nitrogen-15 Magnetic Resonance Spectroscopy. II. Coupling Constants

Binsch, Gerhard and Lambert, Joseph B. and Robertson, Bryan W. and Roberts, John D. (1964) Nitrogen-15 Magnetic Resonance Spectroscopy. II. Coupling Constants. Journal of the American Chemical Society, 86 (24). pp. 5564-5570. ISSN 0002-7863. https://resolver.caltech.edu/CaltechAUTHORS:20151016-110315378

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Abstract

Coupling constants have been measured between nitrogen-15 and directly bonded hydrogen or carbon-13, and between nitrogen-15 and hydrogen separated by two or more bonds. The data may generally be interpreted in terms of the Fermi contact coupling mechanism except for those cases where the electron distribution around the nitrogen atom is highly anisotropic. Empirical relationships have been developed which relate the observed J^(15)NH and J^(15)N^(13)C to the hybridization of the orbitals involved. These relationships fail for J^(16)NH in diphenylketimine and for J^(15)N^(13)C in benzalmethylamine and acetonitrile, probably because of contributions to the nuclear spin-spin coupling from electron orbital motion. The data are consistent with the interpretation that nitrogen in ammonia forms nearly sp^3 bonds to hydrogen, rather than p bonds as suggested by Pauling.


Item Type:Article
Related URLs:
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http:/dx.doi.org/10.1021/ja01078a033DOIArticle
http://pubs.acs.org/doi/abs/10.1021/ja01078a033PublisherArticle
Additional Information:© 1964 American Chemical Society. Received August 25, 1964. Supported in part by the Public Health Service Research Grant 11072-01 from the Division of General Medical Sciences, the Office of Naval Research, and the National Science Foundation. National Science Foundation Graduate Fellow, 1962-1965; National Academy of Sciences-National Research Council Postdoctoral Fellow, 1963-1964.
Funders:
Funding AgencyGrant Number
U.S. Public Health Service (USPHS)11072-01
Office of Naval Research (ONR)UNSPECIFIED
NSFUNSPECIFIED
NSF Graduate FellowshipUNSPECIFIED
National Academy of Sciences-National Research Council Postdoctoral FellowshipUNSPECIFIED
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Caltech Gates and Crellin Laboratories of Chemistry3099
Issue or Number:24
Record Number:CaltechAUTHORS:20151016-110315378
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20151016-110315378
Official Citation:Nitrogen-15 Magnetic Resonance Spectroscopy. II. Coupling Constants Gerhard. Binsch, Joseph B. Lambert, Bryan W. Roberts, and John D. Roberts Journal of the American Chemical Society 1964 86 (24), 5564-5570 DOI: 10.1021/ja01078a033
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61200
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:16 Oct 2015 18:57
Last Modified:03 Oct 2019 09:05

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