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Proton chemical shifts and pi-electron densities in substituted benzenes

  • C. R. Kanekar
  • G. Govil
  • C. L. Khetrapal
Article
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Abstract

The relation between proton chemical shifts and pi-electron densities in aromatic systems suggested by Schug and Dech has been modified so as to include contributions due to steric effects. The proton chemical shifts inmeta disubstituted benzenes calculated from the modified relation are in good agreement with the observed data. The relation enables one to assess the steric effects of the substituents.

Keywords

Benzene Chemical Shift Nitrobenzene Steric Effect Aromatic System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Dharmatti, S. S., Govil, G., Kanekar, C. R., Khetrapal, C. L. and Virmani, Y. P.Proc. Ind. Acad. Sci., 1966,63, 9.Google Scholar
  2. 2.
    Farthing, A. C. and Nam, B.Steric Effects in Conjugated System, edited by G. W. Gray, Butterworth Scientific Publications, 1958, p. 131.Google Scholar
  3. 3.
    Fraenkel, G.,et al...J. Am. Chem. Soc., 1960,82, 5846.CrossRefGoogle Scholar
  4. 4.
    Martin, J. and Dailey, B. P.J. Chem. Phys., 1963,39, 1722.CrossRefGoogle Scholar
  5. 5.
    Musher, J. I... Ibid., 1962,37, 34.CrossRefGoogle Scholar
  6. 6.
    Schaefer, T. and Schneider, W. G.Cand. J. Chem., 1963,41, 966.CrossRefGoogle Scholar
  7. 7.
    Schug, J. C. and Dech, J. C.J. Chem. Phys., 1962,37, 2618.CrossRefGoogle Scholar
  8. 8.
    Smith, I. C. and Schneider, W. G.Cand. J. Chem., 1961,39, 1158.CrossRefGoogle Scholar
  9. 9.
    Wittaker, E. and Robinson, A.The Calculus of Observations, Blackie and Sons Ltd., London, 1954.Google Scholar
  10. 10.
    Wu, T. K. and Dailey, B. P.J. Chem. Phys., 1964,41, 2796.CrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 1967

Authors and Affiliations

  • C. R. Kanekar
    • 1
  • G. Govil
    • 1
  • C. L. Khetrapal
    • 1
  1. 1.Tata Institute of Fundamental ResearchBombay-5

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