Infrared matrix isolation studies of the acetohydroxamic acid complexes with HF and HCl

Argon matrix infrared spectra of the complexes formed between acetohydroxamic acid (CH3CONHOH) and hydrogen halides (HF, HCl) have been recorded. The experimental results indicate formation of a strong binary complex in which the hydrogen halide molecule acts as a proton donor towards the carbonyl group of acetohydroxamic acid. The H–X stretches and several perturbed CH3CONHOH vibrations were identified for the two HX complexes; for the HF complex the two librational HF modes were also observed. q 2004 Elsevier B.V. All rights reserved