Research on Chemical Intermediates

, Volume 22, Issue 8, pp 725–735 | Cite as

NMR isotope shifts in the 2-methyl-2-bicyclo[2.1.1]hexyl cation and related systems

  • David A. Forsyth
  • Chitchanun Panyachotipun


NMR isotope shifts at 13C nuclei due to deuteriation in the 2-methyl-2-bicyclo[2.1.1]hexyl cation are reported. Comparisons are made to the 2-methyl-2-bicyclo[2.2.1]heptyl and 2-methyl-2-bicyclo[2.2.2]octyl cations, and also to neutral molecules containing the bicyclo[2.1.1]hexyl framework. The combination of isotope effects with temperature dependence of 13C chemical shifts allows predictions of the shapes of the energy surfaces along the bending coordinate corresponding to bridging in these cations.


Chemical Shift Isotope Effect Isotope Shift Upfield Shift Heptyl 
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Copyright information

© Springer 1996

Authors and Affiliations

  • David A. Forsyth
    • 1
  • Chitchanun Panyachotipun
    • 1
  1. 1.Department of ChemistryNortheastern UniversityBoston

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