Assignment of the Raman active lattice vibrations in various phases of 1,2,4,5 tetrabromobenzene and 1,2,4,5-tetrachlorobenzene crystals

Authors

K.M. White, University of Nebraska - Lincoln
Craig J. Eckhardt, University of Nebraska - LincolnFollow

Date of this Version

May 1989

Comments

Published by American Institute of Physics. J. Chem. Physics Volume 90, Issue 9, pp. 4709-4718(1989). ©1989 American Institute of Physics. Permission to use. http://jcp.aip.org/.

Abstract

Results of polarized Raman spectroscopy are reported and used to obtain complete assignment of the optical lattice modes of 1,2,4,5-tetrabromobenzene crystals for both the beta and gamma phases. Similar information is provided for the beta phase of 1,2,4,5-tetrachlorobenzene crystal. The results are compared with lattice-dynamics calculations. Discrepancies with previously reported measurements and calculations are discussed and rationalized. The Journal of Chemical Physics is copyrighted by The American Institute of Physics.