Molecular motions of triethylenediamine in its low-temperature phase
- 20 November 1980
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 13 (32) , L927-L934
- https://doi.org/10.1088/0022-3719/13/32/002
Abstract
At atmospheric pressure N(CH2CH2)3N undergoes a solid state structural transition at 351K. Single crystals of phase II (below 351K) have been grown by slow sublimation in a Lindemann capillary tube. The crystal structures have been determined at two temperatures: T1=298K and T2=110K. They confirm the P63/m space group of this phase. They also show a marked anisotropy in the molecular rigid-body libration at 298K. This anisotropy becomes smaller at low temperature. An explanation for the transition to a plastic phase is suggested in terms of an increase with temperature of the amplitude of that libration.Keywords
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