FTIR spectra of the hydrogen-bonded complex H2CS⋯HCl in solid Ar, N2, and Xe

Methanesulfenyl chloride and its deuterated isotopomer were photodecomposed in several low-temperature matrices and the vibrational spectra of generated thioformaldehyde⋯hydrogen chloride complexes were recorded. In solid Ar, previously unreported several modes, especially the intermolecular librational modes, were observed. The H–Cl stretching mode of the complex revealed a characteristic large red shift from the monomer frequency in Ar and N2 matrices. In addition to this large red shifted band, a relatively small shifted H–Cl stretching band was observed in a Xe matrix. The latter was considered to be due to the complex in a less-perturbed matrix site.