High-pressure in-situ crystallization, structure and phase transitions in 1,2-dichloroethane
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Maciej Bujak
Abstract
The single crystal of 1,2-dichloroethane, C2H4Cl2 was in-situ crystallized in a Merrill-Bassett diamond-anvil cell, and its structure determined at 0.7 GPa and 280 K. The crystals are monoclinic, space group P21/c. The C2H4Cl2 molecules in the s-trans conformation are located at the inversion centers. The —H2C—CH2—ethylene group is disordered in two sites, with equal occupancies, one rotated by 180° to the other about the Cl⋯Cl axis of the molecule. The crystal cohesion forces have been attributed mainly to Cl⋯Cl intermolecular interactions, and their role in the mechanism of the phase transition at 177 K has been analysed. It was found that the order-disorder phase transition in the structure of 1,2-dichloroethane is associated with the breaking of the Cl⋯Cl intermolecular interactions in the disordered phase. The crystal amorphization under non-homogeneous strain and subsequent transition to a new pressure-induced polymorph at 1.5 GPa has been observed.
© 2004 Oldenbourg Wissenschaftsverlag GmbH
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Articles in the same Issue
- Description of X-ray powder pattern of turbostratically disordered layer structures with a Rietveld compatible approach
- Crystal structures and their enumeration via quotient graphs
- On the crystal parameters of some representatives of the NiAs family containing platinum group metals and gold
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- Structure and characterization of methyl (±)-1-(2-aminophenyl)-2-hydroxy-4-(4-methoxybenzoyl)-5-(4-methoxyphenyl)-3-oxo-2,3-dihydro-1H-pyrrole-2-acetate
- Structure analysis and the existence of light-induced long-lived metastable states in Xn[Fe(CN)5NO] with inorganic and organic cations: Xn = Pb, (H3O+CH6N+), (C2N2H7)2 and (C16H36N)2
- Study on β-sheet packing, stabilized by aromatic interactions in a tri-peptide crystal
- High-pressure in-situ crystallization, structure and phase transitions in 1,2-dichloroethane
- Low-temperature crystal structure of RS-thiocamphor
