Raman and infrared spectra of solid carbon diselenide

Abstract

Raman and infrared spectra of polycrystalline samples of CSe2 have been recorded at temperatures from 20-205 K. A comparison with previous results for CS, shows that the spectra are consistent with the two substances having the same centrosymmetric orthorhombic structure. The observed spectra for CSe,, in both the lattice and molecular regions, are in good agreement with group theoretical predictions based on this structure. There is only one solid phase over the range of temperatures examined.

(Hyper)polarizability of carbon diselenide

“…We note the determination of the dipole moment derivative for the asymmetric stretching of the C-Se bond, extracted from gas phase measurements of the infrared intensity by Wentink and Bauer [2]. Garetz and Khosrofian measured the optical Kerr susceptibility of liquid CSe 2 [3]. The Raman and infrared spectra of solid CSe 2 were measured by Torrie et al [4].…”

Structure of solid carbon diselenide (CSe2) at 17.5, 50 and 200K

“…We proceeded on the assumption that CSe2 has the same structure as CS2 and determined the structure at three widely separated temperatures, 17.5, 50 and 200K, as a check on possible phase transitions (the melting temperature is 227.7 K). In a companion study, we have measured the frequencies of the Raman and infrared active lattice modes (Torrie, Andrews, Anderson & Powell, 1983).…”