Infra-red cryogenic studies. Part 9.—Methanethiol and ethanethiol in matrices

Abstract

Infra-red spectra are reported of methanethiol and ethanethiol suspended in argon matrices, and of ethanethiol in nitrogen and carbon monoxide matrices, at 20 K. The small bandwidths in the low temperature matrices reveal the presence of bands due to both trans and gauche conformers of ethanethiol, the trans conformer being the more stable. Concentration studies result in the identification of open chain dimer and cyclic tetramer species from their SH stretching absorptions.