Infrared Spectra of Matrix-Isolated Hydrogen Sulfide in Solid Nitrogen

The infrared spectra of H2S in a series of solid nitrogen matrices at 20°K are recorded for the 2500–4000-cm−1 region. From a curve-resolution analysis of the SH stretching region, assignments of peaks are made to monomer, dimer, and polymer species. The H2S dimer absorptions lead to a postulated open structure with a single hydrogen bond. An estimate based on frequency-shift data indicates a hydrogen bond strength of roughly half that found in the matrix-isolated water dimer.