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Nitrogen-15 nuclear magnetic resonance spectroscopy. Carbodiimides

Yavari, Issa and Roberts, John D. (1978) Nitrogen-15 nuclear magnetic resonance spectroscopy. Carbodiimides. Journal of Organic Chemistry, 43 (25). pp. 4689-4693. ISSN 0022-3263. doi:10.1021/jo00419a001.

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High-resolution, 18.25-MHz nitrogen-15 NMR spectra of several carbodiimides (1) have been obtained at the natural-abundance level. The high-field positions of the ^(15)N resonances of these substances are discussed in terms of two different shielding mechanisms. Solvent influences on the ^(15)N and ^(13)C chemical shifts of carbodiimides are small. Both the ^(13)C and ^(15)N spectra of l-ethyl-3-[3-(dimethylamino)propyl]carbodiimidhey drochloride indicate that at least four different structural isomers are present in dimethyl sulfoxide solution at room temperature. Information about the dimerization of carbodiimides in the presence of alkylating agents has been obtained from ^(15)N and ^(13)C NMR.

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Additional Information:© 1978 American Chemical Society. Received January 31,1978. December 8, 1978. Supported by the National Science Foundation, and by the Public Health Service, Research Grant No. GM-11073 from the Division of General Medical Sciences.
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U.S. Public Health Service (USPHS)GM-11073
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Caltech Gates and Crellin Laboratories of Chemistry5729
Issue or Number:25
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Official Citation:Nitrogen-15 nuclear magnetic resonance spectroscopy. Carbodiimides Issa Yavari and John D. Roberts The Journal of Organic Chemistry 1978 43 (25), 4689-4693 DOI: 10.1021/jo00419a001
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:60866
Deposited By: Ruth Sustaita
Deposited On:07 Oct 2015 22:40
Last Modified:10 Nov 2021 22:40

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