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Enhancement of the direct13C-1H coupling constant upon physical approximation of the proton and heteroatom in N-vinylheterocycles

  • A. V. Afonin
  • A. V. Vashchenko
  • D. K. Danovich
  • B. V. Trzhtsinskaya
  • L. V. Baikalova
  • E. V. Apakina
Brief Communications

Conclusions

  1. 1.

    The addition contribution of the unshared electron pair of the heteroatom to the direct13C-1H coupling constant markedly increases upon approximation of the hydrogen atom and heteroatom to a distance less than the sum of their van der Waals radii.

     
  2. 2.

    An effect of the unshared electron pair on the direct13C-1H coupling constant in the case of physical approximation of the proton and heteroatom is found in the case of nonbonding overlap of the electron cloud of the unshared electron pair of the heteroatom and the s orbital of the hydrogen atom.

     

Keywords

Hydrogen Hydrogen Atom Electron Pair Addition Contribution Electron Cloud 
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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Copyright information

© Plenum Publishing Corporation 1990

Authors and Affiliations

  • A. V. Afonin
    • 1
  • A. V. Vashchenko
    • 1
  • D. K. Danovich
    • 1
  • B. V. Trzhtsinskaya
    • 1
  • L. V. Baikalova
    • 1
  • E. V. Apakina
    • 1
  1. 1.Irkutsk Institute of Organic Chemistry, Siberian BranchAcademy of Sciences of the USSRRussia

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