Infrared and Raman spectra have been obtained over the region 4000 cm−1 to 33 cm−1 on ortho- and meta-substituted styrenes including F, Br, Cl, methyl, and meta-nitro derivatives. The entire spectral region has been investigated in the liquid state while selected regions and isomers have been studied in the solid and gas phase. Gas phase and interferometric spectra in the far ir of ortho- and meta-fluorostyrene did not reveal the torsional modes. Assignment of most fundamental modes of vibrations are reported and discussed.
W. G. Fateley, G. L. Carlson, and F. E. Dickson, "Infrared and Raman Studies of Ortho- and Meta-Substituted Styrenes," Appl. Spectrosc. 22, 650-658 (1968)