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Title: A 13C-NMR study of non-planar distortions in amides
Authors: Khetrapal, C.L.
Kunwar, A.C.
Keywords: nematic phase;
direct-dipolar couplings;
indirect spin-spin couplings;
chemical shift;
peptide unit;
dihedral angles
Issue Date: 1981
Citation: Journal of Biochemical and Biophysical Methods, 1981, Vol.4, p185-190
Abstract: The technique of 13C-NMR spectroscopy of oriented systems to problems of biological importance has been suggested and used to investigate non-planar distortions in substituted amides—models for peptides. The studies in conjunction with the proton magnetic resonance data on 15N-[13C]methyl[13C]formamide oriented in a nematic solvent provide all the direct dipolar couplings between the interacting nuclei in the system. When the 13C- and the 1H-NMR experiments are performed under non-identical conditions, 22 different direct dipolar couplings are obtained. It is demostrated that they can be used to determine unambiguously non-planar distortions around the nitrogen atom together with other geometrical data and the molecular order.
Description: Restricted Access.
ISSN: 0165-022X
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Copyright: 1981 Elsevier B.V
Appears in Collections:Research Papers (SCM)

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