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Nitrogen-15 Nuclear Magnetic Resonance Spectroscopy. Nitrogen-15 Chemical Shifts Determined from Natural-Abundance Spectra

Warren, John P. and Roberts, John D. (1974) Nitrogen-15 Nuclear Magnetic Resonance Spectroscopy. Nitrogen-15 Chemical Shifts Determined from Natural-Abundance Spectra. Journal of Physical Chemistry, 78 (24). pp. 2507-2511. ISSN 0022-3654. doi:10.1021/j100617a017.

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A number of ^(15)N chemical shifts, determined at the natural-abundance level of the isotope, are reported for some secondary alkylamines, amides, ureas, urethanes, heterocycles, and miscellaneous compounds. Substituent chemical-shift parameters have been derived for secondary-alkylamine ^(15)N chemical shifts. The ^(15)N chemical shifts of secondary alkylamines appear to be potentially useful to determine the number of carbon atoms β to the nitrogen. Effects produced by differences in stereochemistry on the ^(15)N nmr spectra of di-2-butylamine and di-2-hexylamine have been detected. Possible procedures for accounting for changes in diamagnetic shielding between pairs of compounds are discussed.

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Additional Information:© 1974 American Chemical Society. Received May 23, 1974. We are grateful to Dr. R.L. Lichter for a number of useful discussions, and to Dr. B.L. Hawkins who made the modifications to the spectrometer for Fourier-transform operation. Supported by the Public Health Service, Research Grant No. GM- 11072 from the Division of General Medical Sciences, and by the National Science Foundation. Contribution No. 4892.
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U.S. Public Health Service (USPHS)GM-11072
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Caltech Gates and Crellin Laboratories of Chemistry4892
Issue or Number:24
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Official Citation:Nitrogen-15 nuclear magnetic resonance spectroscopy. Nitrogen-15 chemical shifts determined from natural-abundance spectra John P. Warren and John D. Roberts The Journal of Physical Chemistry 1974 78 (24), 2507-2511 DOI: 10.1021/j100617a017
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:60927
Deposited By: Ruth Sustaita
Deposited On:10 Oct 2015 02:40
Last Modified:10 Nov 2021 22:41

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