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14N and 1H Spin-Lattice Relaxation in Solid 3,5-Dimethylpyrazole

  • F. Aguilar-Parrilla
  • H.-H. Limbach
  • M. Blanz
  • T. J. Rayner
  • J. A. S. Smith
Conference paper

Abstract

3,5-Dimethylpyrazole forms planar N-H…N hydrogen-bonded trimers in the solid state (fig. 1) with point symmetry 32 or D3 1). The NH hydrogen atoms must therefore be disordered, and recent 13C, 15N CP-MAS magnetic resonance and 14N quadrupole double resonance studies 2) have shown that this disorder is a dynamic effect, in which correlated triple hydrogen jumps occur within a given trimer with an activation energy of 45.7 kJ mol-1 between 260 K and 350 K.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • F. Aguilar-Parrilla
    • 1
  • H.-H. Limbach
    • 1
  • M. Blanz
    • 2
  • T. J. Rayner
    • 2
  • J. A. S. Smith
    • 2
  1. 1.Institut für physikalische ChemieUniversität FreiburgFreiburg i. Br.West Germany
  2. 2.Chemistry DepartmentKing’s CollegeLondonUK

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