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Title: Proton NMR spectral studies on N-(4-methylphenyl)-2- and 3-pyridinecarboxamides
Authors: Singha, N C
Anand, Jayashree
Sathyanarayana, D N
Issue Date: Oct-1998
Publisher: NISCAIR-CSIR, India
Abstract: The 1H NMR spectra of N-(4-methylphenyl)-2-pyridinecarboxamide and N-(4-methyl-phenyl)-3-pyridine carboxamide in CDCI3 and (CD3)2CO have been analysed with the help of the COSY spectra. Accurate 1H chemical shifts and coupling constants have been obtained from the simulated spectra. From 1H 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 H:2 than to H4. The orientation of the 4-methylphenyl group could not be determined.
Page(s): 882-886
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.37A(10) [October 1998]

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