The ring breathing vibration is assigned to the band at 1010 cm−1 observed in the
FT-IR and FT-Raman spectra. This wavenumber is in excellent
agreement with the theoretical predictions, 1008 cm−1 (Q19), and is supported by the literature data [20]. The C C
aromatic stretch, known as semicircle stretching, predicted at
1563 cm−1 (mode Q28) is in reasonable agreement with that
observed in FT-Raman spectrum.