FIG. . Comparison between calculated and experimental RR spectra for thymine. The Raman excitation wavelength is 266 nm, and the functional frequencies have been scaled according to literature scaling factors for CAM-B3LYP (0.9613) and PBE0 (0.9512). The quantitative agreements allows us to make vibrational assignments. The asterisk marks the experimental internal standard. Labels 1-9 correspond to the normal modes in Fig. .