Raman spectra of overheated sulfur vapor

Abstract Our thermodynamic study allows to confirm the selective observation with a blue exciting line (457.9 or 476.5 nm) of the resonance Raman spectra of the S 3 molecule. The extinction coefficient of the maximum λ = 395 nm of its absorption spectrum e = 2100 1 mole −1 cm −1 is quite lower than that previously reported. The resonance Raman spectra of 32 S 3 and 34 S 4 may be explained with three normal frequencies and confirm the bent C 2v geometry of this molecule in perfect agreement with the structure of the parent anions, S − 3 and S 2− 3 .