Nuclear Magnetic Resonance Spectroscopy. Spin-Spin Coupling of Carbon to Phosphorus, Mercury, Nitrogen, and Other Elements
- Creators
- Weigert, Frank J.
- Roberts, John D.
Abstract
Spin-spin coupling between carbon and phosphorus, mercury, nitrogen, and boron has been observed in proton-decoupled ^(13)C spectra. One-bond couplings involving carbon are generally positive and two-bond couplings are negative; however, if unhybridized p orbitals are used in the bonding, such as with phosphorus(III) or fluorine, one-bond couplings are negative and two-bond couplings are positive. A comparison of the magnitudes of carbon-phosphorus and carbon-nitrogen couplings with carbon-carbon couplings shows a significant negative contribution to the coupling constants which suggests that average energy approximation should not be used for this kind of comparison. Carbon-mercury couplings correlate well with carbon-carbon or proton-mercury couplings in similar bonding situations.
Additional Information
© 1972 American Chemical Society. Received June 8, 1972. Supported in part by the National Science Foundation and by the Public Health Service, Grant No. GM-11072 from the Division of General Medical Sciences. Preliminary communication: F. J. Weigert and J. D. Roberts, J. Amer. Chem. SOC., 91, 4940 (1969). National Science Foundation predoctoral fellow, 1965-1968.Additional details
- Eprint ID
- 60949
- DOI
- 10.1021/ic50120a014
- Resolver ID
- CaltechAUTHORS:20151009-133524444
- NSF
- U.S. Public Health Service (USPHS)
- GM-11072
- NSF Predoctoral Fellowship
- Created
-
2015-10-15Created from EPrint's datestamp field
- Updated
-
2021-11-10Created from EPrint's last_modified field
- Other Numbering System Name
- Caltech Gates and Crellin Laboratories of Chemistry
- Other Numbering System Identifier
- 4473