Single Crystal X-ray Diffraction and Low Temperature Calorimetric Studies of the Thiourea-hexachloroethane Adduct

摘要

The thiourea hexachloroethane adduct has been studied by single crystal X-ray diffraction and low temperature calorimetry. The guest molecules are disordered in three orientations in the adduct channel. The thermal properties are described consistently by a model involving the orientational disorder of the guest molecules and their ordering in a phase transition at 96 K. A small degree of disorder persists to lower temperatures and becomes frozen into an immobile State below a glass transition at 59 K.