Chr. Bräuchle, D.M. Burland, et al.
JACS
Single crystal polarized Raman spectra of p-diiodobenzene in the region from 0 to 300 cm-1 are presented for sample temperatures from 2 to 330 K. Eleven of the twelve predicted gerade librational phonons are unambiguously assigned in terms of their space group symmetries. The temperature dependence of the Raman spectra does not show a soft gerade phonon at the nearly second-order phase transition which occurs at 326 K. A significant anharmonicity for molecular motions above the I-I axis is indicated by the observation of overtones and combinations and broadening of these phonons as the temperature is raised from 2 K. Copyright © 1976 American Institute of Physics.
Chr. Bräuchle, D.M. Burland, et al.
JACS
R.D. Miller, K. Betterton, et al.
OTF 1993
R.K. Grygier, P.-A. Brugger, et al.
Journal of Physical Chemistry
R.M. Macfarlane, U. Konzelmann, et al.
The Journal of Chemical Physics