Millimeter- and submillimeter-wave spectrum of trans-formaldoxime (CH₂NOH)

Context. Among the six atoms of N-containing molecules with formula CH 3 NO, only formamide (H 2 NCHO), most stable structural isomer, has been detected in interstellar medium (ISM). The formaldoxime isomer may be formed, for example, by reaction formaldehyde CO) or methanimine CNH) and hydroxylamine NOH), which are all ISM. lack high accuracy millimeter- submillimeter-wave measurements hinders astronomical search formaldoxime. Aims. aim this work is to provide direct laboratory measurement spectrum trans-formaldoxime. Methods. Formaldoxime was synthesized its rotational recorded at room temperature a glass flow cell using spectrometer Lille. SPFIT program CALPGM suite used fit spectrum. Results. Rotational lines trans-formaldoxime from both ground state v 12 = 1 vibrational excited states have measured assigned 150 660 GHz. Spectroscopic constants were derived tenth order Watson’s A S reduction Hamiltonian.