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Issue 2, 1989
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Chlorine-35 nuclear quadrupole resonance study of molecular torsional motion in some chloropyridine-N-oxides and chloroquinoline-N-oxides

Abstract

Chlorine has been substituted at the 2- and 4-positions in the pyridine and quinoline rings of the corresponding N-oxides and 35Cl n.q.r. spectra have been studied in the temperature range 77–300 K. The change in the n.q.r. frequencies in N-oxides as compared to their parent compounds are interpreted in terms of the conjugative effect and the inductive effect of the N+—O group. The negative temperature coefficients of the resonance frequencies in chloropyridine-N-oxides have been analysed using the Bayer, Kushida and Brown equations. The calculated torsional frequencies, which are in the range 52–78 cm–1, are found to be only slightly temperature dependent.

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Article type: Paper
DOI: 10.1039/F29898500131
J. Chem. Soc., Faraday Trans. 2, 1989,85, 131-136

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    Chlorine-35 nuclear quadrupole resonance study of molecular torsional motion in some chloropyridine-N-oxides and chloroquinoline-N-oxides

    P. S. Raghoottama, S. Soundararajan and J. Ramakrishna, J. Chem. Soc., Faraday Trans. 2, 1989, 85, 131
    DOI: 10.1039/F29898500131

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