Infrared Spectra in Polarized Light of Acenaphthene Crystals and Assignment of Molecular Vibrations

Abstract

Infrared spectra of acenaphthene crystals measured with polarized radiation in the region 400–3000 cm^—1 are reported. The unit cell contains four molecules. Splitting of bands in the crystal spectrum has been observed. However, because of the specific positions of molecules in the crystal lattice, a unique determination of the vibration symmetry is possible. An assignment of recorded frequencies is proposed.