Rotational Lattice Vibrations of - and Pyrazine Crystals

Article abstract of DOI:10.1246/bcsj.62.925

Low-frequency Raman bands of the <1H4>- and <2H4>pyrazine crystals were studied at various temperatures between 4.2 and 300 K.All six rotational lattice vibrations were identified based on the isotopic factor (the ratio of the vibrational frquency of the <1H4>- and <2h4>pyrazine crystals) of the individual vibrations.Classification of the rotational lattice vibrations into symmetry species was made through the polarisation measurement of the Raman bands in single crystals.