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Proton NMR spectral studies on N-(4-methylphenyl)-2- and 3-pyridinecarboxamides

Singha, NC and Anand, J and Sathyanarayana, DN (1998) Proton NMR spectral studies on N-(4-methylphenyl)-2- and 3-pyridinecarboxamides. In: Indian Journal of Chemistry - Section A: Inorganic, Physical, Theoretical and Analytical Chemistry, 37 (10). pp. 882-886.

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Official URL: http://www.niscair.res.in/ScienceCommunication/Res...

Abstract

The H-1 NMR spectra of N-(4-methylphenyl)-2-pyridinecarboxamide and N-(4-methyl-phenyl)-3-pyridine carboxamide in CDCl3 and (CD3)(2)CO have been analysed with the help of the COSY spectra. Accurate H-1 chemical shifts and coupling constants have been obtained from the simulated spectra. From H-1 NMR and Nuclear Overhauser Enhancement (NOE) measurements the molecular conformations are inferred. The pyridyl ring is apparently coplanar with the amide group while the 3-pyridyl ring is nearly perpendicular to the amide plane so that the amide proton is nearer to the 2-pyridyl proton H2 than to H4. The orientation of the 4-methylphenyl group could not be determined.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to National Institute of Science Communication and Information Resources.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 09 Jun 2011 06:14
Last Modified: 09 Jun 2011 06:14
URI: http://eprints.iisc.ernet.in/id/eprint/38179

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