Infrared spectrum and structure of some derivatives of formhydroxamic acid: Part II. Methyl formyl chloride oxime

Abstract

The spectrum from 650–4000 cm −1 of methyl formyl chloride oxime has been studied in the gaseous and liquid states. The molecule has a structure corresponding to the enolic form of O-methyl formhydroxamic acid, (i.e., to the enolic form of N-methoxyformamide). A study of the band contours of the vapor phase absorptions indicates a planar configuration of the H.C(Cl):NOC grouping with a trans disposition of the CH 3 group with respect to the Cl atom. The frequencies of the (NOCH 3) group vibrations simulate closely those in O-methyl formhydroxamic acid but significant differences in the (CN) and (CH) frequencies are noted.