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.