New Measurements of the Infrared and the Raman Spectrum of S2Cl2

Abstract

The Raman spectrum of S2Cl2 has been excited with a 6-mW He–Ne laser, 6328 Å, and new depolarization ratios of the Raman bands have been obtained. The Raman band at 449 cm−1 previously reported by earlier workers is shown to be two bands corresponding to two fundamentals, one of Type A and another Type of B, at 446 cm−1 and 434 cm−1, respectively. The Raman band at 102 cm−1 corresponding to the torsional mode is found to be polarized in disagreement with earlier investigations; the torsional mode is far-infrared active at 106 cm−1. Three infrared-active fundamentals and six overtones were observed in the 3000–400 cm−1 region. One of these overtones at 1340 cm−1 has not been reported previously. One Raman overtone band and one Raman combination band have been observed at 858 cm−1 and 647 cm−1, respectively. The Raman and infrared data have been correlated with the right-angle configuration of C2 symmetry, and thermodynamic properties have been calculated for the liquid state using the harmonic-oscillator approximation.