# LATTICE MODES IN 1,3,5-TRICHLOROBENZENE.

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 Title: LATTICE MODES IN 1,3,5-TRICHLOROBENZENE. Creators: Muller, D. E.; Inoue, T.; Larkin, Robert H.; Stidham, Howard D. Issue Date: 1969 Publisher: Ohio State University Abstract: 1,3,5-Trichlorobenzene crystallizes in space group $P2_{1}2_{1}2_{1} (D_{2}^{4})$ with four molecules per unit cell. The twelve librational modes are divided evenly among the four irreducible representations of factor group $D_{2}$, and are joined by the nine optical translatory vibrations which are distributed $3A+2B_{1}+2B_{2}+2B_{2}+2B_{3}$. These lattice modes are all Raman active and occur below $100 cm^{-1}$, permitting partial identification by single crystal laser Raman polarization data. The assignments are assisted by comparison with corresponding data secured for the isomorphic crystal 1,3,5-tribromobenzene. The temperature dependence of the optical modes is reported, and the relation to the chlorine nuclear quadrupole resonance spectrum of 1,3,5-trichlorobenzene is discussed. Description: Author Institution: Department of Chemistry, University of Massachusetts URI: http://hdl.handle.net/1811/15805 Other Identifiers: 1969-Q-10