ISSN:
0377-0486
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Raman and infrared spectra of crystalline1,2,3,4,5-tetrachloro- and tetrabromobenzenes have been analysed between 10 and 100 cm-1 over a range of temperature from 10 K to 400 K. An assignment of lattice modes is given. The first-order phase transition is of a displacive type as shown by the behaviour of librational modes. The small value of the estimated β critical exponent in the νT/ν0 = (Tc - T/Tc)β experession is interperted in terms of predominant short-range interactions in these molecular crystals.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jrs.1250060311
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