Raman spectrum of matrix isolated hydrogen sulfide

Raman spectra of H 2 S isolated in N 2 at M / A ratios of 30, 50, 100, and 300 and in Ar at M / A ratios of 50, 100, 300, and 1000 have been measured in the S‐H stretching region. The spectral results confirm the infrared measurements on H 2 S isolated in N 2 ; however, the symmetric stretching vibration, v 1 , of the H 2 S monomer is at about the same frequency, 2619 cm −1 , in the spectra of Ar matrices. This disagrees with previous infrared measurements of Ar matrices. Raman bands in the spectra of both N 2 and Ar matrices due to a dimer of H 2 S are consistent with those observed in the infrared spectrum of N 2 matrices, and they support a donor‐acceptor model for the dimer.