The Methyl Rotational Potentials of Various Isotopic Methyl Iodides and Their Coupling to Phonons

  • M. Prager
  • J. Stanislawski
  • W. Häusler
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 17)


The rotational potentials of methyl groups in protonated and deuterated methyl iodide were determined from the observed tunnel splittings and the librational energies. The potential becomes stronger in the deuterated matrix by about 10 %. For pure CD3I the isotope effect on the librational modes shows a considerable further increase. No rotor-rotor coupling is found. The coupling to low-frequency phonons can explain the unusual increase of the tunnel splitting with temperature observed for T < 15 K.


Isotope Effect Methyl Iodide Librational Mode Tunnelling Spectrum Rotational Potential 
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  1. 1.
    M. Prager, J. Stanislawski and W. Häusler submitted to J. Chem. Phys.Google Scholar
  2. 2.
    T. Kawaguchi, M. Hijikawa, Y. Hayafiyi, M. Ikeda, R. Fukishima and Y. Tomie, Bull. Chem. Soc. Jpn.46, 53 (1973)Google Scholar
  3. 3.
    A. Hüller, Z. Phys. B36, 215 (1980)Google Scholar
  4. 4.
    A.C. Hewson, J. Phys. C15, 3841 and 3855 (1982)Google Scholar
  5. 5.
    P. Brüesch, Phonons: Theory and Experiments I Springer Series in Solid State Sciences Vol. 34 ( Springer, Berlin, Heidelberg, New York 1982 )Google Scholar
  6. 6.
    K.H. Link, H. Grimm, B. Dorner, H. Zimmermann, H. Stiller and P. Bleckmann, J. Phys. Chem. Solids 46, 135 (1985)Google Scholar
  7. 7.
    H. Takeuchi, J.L. Bribes, I. Hirada and T. Shimanouchi, J. Raman Spectrosc. 4, 235 (1976)Google Scholar
  8. 8.
    O.S. Binbrek, A. Anderson, B. Andrews and B.H. Torrie, J. Raman Spectrosc. 15, 406 (1984)Google Scholar
  9. 9.
    J.A. Janik, A. Bajorek, J.M. Janik, I. Natkaniec, K. Parlinski and M. Sudnik, Acta Physica Polonica XXXIII, 419 (1968)Google Scholar
  10. 10.
    S. Clough, A. Heidemann, A.H. Horsewill and M.N.J. Paley Z. Phys. B55, 1 (1984)Google Scholar
  11. 11.
    W. Press, Springer Tracts in Modern Physics, Vol. 92, ( Springer, Berlin, Heidelberg, New York 1981 )Google Scholar
  12. 12.
    M. Prager and W. Müller-Warmuth, Z. Naturforschung 39a, 1187 (1984)Google Scholar
  13. 13.
    L. P. Ingman, M. Punkkinen, A. H. Vuorimäki and E.E. Ylinen, J.Phys. C18, 5033 (1985)Google Scholar
  14. 14.
    W. Häusler and A. HUller, Z. Phys. B59, 177 (1985)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1987

Authors and Affiliations

  • M. Prager
    • 1
  • J. Stanislawski
    • 1
  • W. Häusler
    • 2
  1. 1.Institut für Festkörperforschung der Kernforschungsanlage JülichJülichFed. Rep. of Germany
  2. 2.Institut für Theoretische PhysikUniversität Erlangen-NürnbergErlangenFed. Rep. of Germany

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