Infra-red cryogenic studies. Part 4.—Isotopically substituted methanols in argon matrices

Abstract

Infra-red spectra are reported between 4000 and 40 cm^–1 for CH₃OH and CH₃OD, and between 4000 and 650 cm^–1 for CD₃OD, ¹³CH₃OH and CH₃¹⁸OD, suspended in argon matrices at 20 K. The small bandwidths in the low-temperature matrix allow a revised vibrational assignment to be made. Concentration studies have been performed on CH₃OH, resulting in the identification of open chain dimer, trimer and tetramer, and cyclic tetramer, species from their OH stretching vibrations. The effect of association on other regions of the spectrum is examined.