Infra-red cryogenic studies. Part 13.—Halogenoalkanes in argon matrices

Abstract

Infra-red spectra are reported of the halogenomethanes and the C₂ to C₄ iodoalkanes isolated in argon matrices at 20 K. The observed bands are correlated with the different conformers of the iodopropanes and iodobutanes. Concentration studies of the halogenomethanes in argon matrices show the growth of multimer bands, the predominant species being a linear dimer. The spectrum of solid fluoromethane is also reported. No evidence was found for rotation of fluoromethane in either argon or methane matrices.