Schuster, Ingeborg I. and Dyllick-Brenzinger, Christina and Roberts, John D. (1979) Nitrogen-15 nuclear magnetic resonance spectroscopy. Effects of hydrogen bonding and protonation on nitrogen chemical shifts of pyrazoles. Journal of Organic Chemistry, 44 (11). pp. 1765-1768. ISSN 0022-3263. doi:10.1021/jo01325a003. https://resolver.caltech.edu/CaltechAUTHORS:20151007-093102214
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Abstract
The ^(15)N chemical shifts of pyrazole, N-methylpyrazole, 3-methyl- and 3,5-dimethylpyrazoles, and indazole have been measured as a function of solvent and acidity of the medium. Hydrogen bonding and protonation result in upfield shifts of both the pyridine- and pyrrole-type nitrogen resonances of these substances with the effect being larger a t the pyridine-type nitrogens. The protonation shifts far exceed those resulting from hydrogen bonding.
| Item Type: | Article | |||||||||
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| Additional Information: | © 1979 American Chemical Society. Received September 5, 1978. Supported by the National Science Foundation and by the Public Health Service. Research Grant No. GM-11072 from the Division of General Medical Sciences. | |||||||||
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| Issue or Number: | 11 | |||||||||
| DOI: | 10.1021/jo01325a003 | |||||||||
| Record Number: | CaltechAUTHORS:20151007-093102214 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20151007-093102214 | |||||||||
| Official Citation: | Nitrogen-15 nuclear magnetic resonance spectroscopy. Effects of hydrogen bonding and protonation on nitrogen chemical shifts of pyrazoles Ingeborg I. Schuster, Christina Dyllick-Brenzinger, and John D. Roberts The Journal of Organic Chemistry 1979 44 (11), 1765-1768 DOI: 10.1021/jo01325a003 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 60859 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | INVALID USER | |||||||||
| Deposited On: | 07 Oct 2015 22:30 | |||||||||
| Last Modified: | 10 Nov 2021 22:40 |
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