ISSN:
0377-0486
Schlagwort(e):
Chemistry
;
Analytical Chemistry and Spectroscopy
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Physik
Notizen:
The external Raman active vibrational modes for sym-tetrachlorobenzene single crystals have been recorded at different low temperatures. Accurate temperature dependent Raman measurements on frequencies and on relative intensities show that tetrachlorobenzene suffers a phase transition at T0 = 160 ± 5 K. Group theoretical Correlation indicates that if the low temperature phase of tetrachlorobvenzene (α phase) is P1 symmetry, then one should observe nine lattice modes in the Raman spectrum; likewise, one should observe only six modes if the space symmetry of the β phase tetrachlorobenzene is P1. The fact that we do not see more than six external Raman peaks at lower temperatures suggests that the low temperature phase symmetry should be P1 for tetrachlorobenzene.
Zusätzliches Material:
3 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/jrs.1250060312
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