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Proton Magnetic Resonance Spectra of Benzene and Benzene-1-13C in Isotropic and in Nematic Solution
Journal article

Proton Magnetic Resonance Spectra of Benzene and Benzene-1-13C in Isotropic and in Nematic Solution

  • Englert, G. 1Physical Research Department, F. Hoffmann-La Roche & Co., Ltd., Basle Physics Department, University of Basle, Switzerland
  • Diehl, P. 1Physical Research Department, F. Hoffmann-La Roche & Co., Ltd., Basle Physics Department, University of Basle, Switzerland
  • Niederberger, W. 1Physical Research Department, F. Hoffmann-La Roche & Co., Ltd., Basle Physics Department, University of Basle, Switzerland
Published in:
  • Zeitschrift für Naturforschung A. - Walter de Gruyter GmbH. - 1971, vol. 26, no. 11, p. 1829-1836
Physical and Theoretical Chemistry
Mathematical Physics
General Physics and Astronomy
English Th 1H-NMR-spectra of benzene and benzene-1-13C in the isotropic phase (CCl4 solution) as well as in the nematic phase of a liquid crystal are analysed and the resulting direct and indirect couplings presented. The comparison of observed direct couplings with values calculated from known Raman structural data shows deviations of up to 9% relative to the HH(orto) -coupling. This corresponds to an apparent increase of the carbon-proton distance of 0.03 A. Possible reasons are discussed such as anisotropy of the indirect couplings, solvent effects on indirect couplings and intramolecular vibrations. The conclusion is reached that the consideration of intramolecular vibrational motion perfectly explains the discrepancies.
Language
  • English
Open access status
closed
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https://sonar.ch/global/documents/232151
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