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Studies on 1,2,3,-Trichloropropane in the Solid Phase

  • Mariano J. Zuriaga
  • Gustavo A. Monti
  • Carlos A. Martín
Conference paper

Abstract

35Cl Nuclear Quadrupole Resonance frequencies and spin-lattice relaxation times, were measured between 100 K and 250 K in 1,2,3-Trichloropropane (CH2C1CHC1CH2C1). Three narrow lines were detected in the stable solid phase, therefore indicating that only one, out of the six possible conformers, is present. Also, the three lines were assigned to the three chlorine atoms in the molecule from their distinct temperature behaviours. The dominant mechanism responsible for the relaxation above 200 K is proposed to be the reorientational motion of the CH2C1 end groups and activation energies of 32.5 and 49.0 kJ mol-1 are determined for the two end groups. The 1H Nuclear Magnetic Resonance lineshape (f(H)) shows a structure due to the dipolar interaction between the protons of the CH2C1 groups. From the analysis of (H) a distance dHH = 1.68 A is obtained, which turns out to be quite close to that already determined in solid Dichloroethane. Fast cooling down of the sample from the liquid state produces very broad NQR signals. The results of Differential Thermal Analysis seem to indicate the existence of a glassy state with a characteristic T = 144 K. 9

PACS number

76.60 Gv 64.70.Pf 

Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • Mariano J. Zuriaga
    • 1
  • Gustavo A. Monti
    • 1
  • Carlos A. Martín
    • 1
  1. 1.Facultad de Matemática, Astronomía y FísicaUniversidad Nacional de CórdobaCórdobaArgentina

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