Infrared matrix isolation studies of complexes between N,N-dimethylacetamide and hydrogen halides. Part 1.—Hydrogen chloride and hydrogen bromide complexes

Abstract

Infrared spectra are reported of strongly hydrogen-bonded 1:1 and 1:2 complexes of N,N-dimethylacetamide with hydrogen chloride or hydrogen bromide in argon and nitrogen matrices. In the 1:1 complexes, the proton is more or less equally shared between the oxygen and halogen atoms with little change in the extent of proton transfer between argon and nitrogen matrices (unlike the amine–hydrogen halide complexes). The second hydrogen halide molecule in the 1:2 complexes appears to form a hydrogen bond with the nitrogen atom of the amide.