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Relations between compression and thermal contraction in 1,2,4-trichlorobenzene and melting of trichlorobenzene isomers.
- Source :
- CrystEngComm; 5/14/2015, Vol. 17 Issue 18, p3446-3451, 6p
- Publication Year :
- 2015
-
Abstract
- The compression and thermal expansion of crystalline 1,2,4-trichlorobenzene, C<subscript>6</subscript>H<subscript>3</subscript>Cl<subscript>3</subscript>, 124TCB, investigated under isobaric and isothermal conditions, are in reverse relation, as for most of crystals, however, the isochoric strain along direction c is clearly different from those along a and b. Single crystals of 124TCB have been in situ grown under isochoric and isobaric conditions, at 270 K/0.1 MPa and 295 K/0.16 GPa, and also at 100 K/0.1 MPa and 295 K/0.64 GPa, when the unit-cell volume is similar. All crystallizations yielded the same phase, of monoclinic space group P2<subscript>1</subscript>/n, with two symmetry-independent molecules (Z′ = 2). The structure is governed by Cl…Cl and Cl…H interactions and the molecules are all nearly parallel to the [001] direction. Systematic differences of these specific contacts afford rationalizing the isochoric strain of the crystal. The phase diagram of 124TCB has been outlined. [ABSTRACT FROM AUTHOR]
- Subjects :
- TRICHLOROBENZENE
THERMAL analysis
ISOMERS
ISOTHERMAL compression
PHASE diagrams
Subjects
Details
- Language :
- English
- ISSN :
- 14668033
- Volume :
- 17
- Issue :
- 18
- Database :
- Complementary Index
- Journal :
- CrystEngComm
- Publication Type :
- Academic Journal
- Accession number :
- 102328908
- Full Text :
- https://doi.org/10.1039/c4ce02289k