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NMR-Investigations of Homogeneous Hydrogenation Reactions using Para Hydrogen

  • J. Bargon
  • J. Kandels
  • P. Kating
  • A. Thomas
  • K. Woelk
Conference paper

Abstract

Homogeneous hydrogenations with ortho- or para-enriched hydrogen result in strongly enhanced 1H-NMR-polarization signals due to symmetry breaking during the reactions. Polarization is observed only, if the transferred atoms stem from the same molecule (“pair correlation”). The polarization pattern reflects the reaction path, e.g. the reaction of two different educts leading to the same product shows different polarization spectra.

Examples given include hydrogenation of certain alkines to alkenes as well as alkenes to alkanes using organometallic rhodium catalysts.

References

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    C. R. Bowers, D. P. Weitekamp, Phys.Rev.Lett. 57, 2645–8 (1986).ADSCrossRefGoogle Scholar
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    J. Bargon, J. Kandels, K. Woelk, Angew.Chem.Int.Ed.Engl. 29, 58–9 (1990).CrossRefGoogle Scholar
  3. 3).
    R. R. Schrock, J. A. Osborn, J.Am.Chem.Soc. 98, 2134–43, 2143–7, 4450–5 (1976).CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • J. Bargon
    • 1
  • J. Kandels
    • 1
  • P. Kating
    • 1
  • A. Thomas
    • 1
  • K. Woelk
    • 1
  1. 1.Institut für Physikalische ChemieUniversität BonnBonn 1Fed. Rep. of Germany

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