The infrared spectra of H2O, D2O, and HDO in nitrogen matrices at temperatures from 20 to 4°K reveal no evidence of rotation of the water molecules. Absorption features attributed to water dimers and the vibrational force constants calculated therefrom are indicative of an open structure with a single moderately weak hydrogen bond. The absence of certain HDO absorptions in the observed spectra can be interpreted as the manifestation of a stronger deuterium-vs-hydrogen bond.
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.
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