High resolution infrared spectrum of methyleneimine, CH2NH,in the 3 μm region

The infrared spectrum of the short-lived methyleneimine, CH2NH, was obtained in the gas phase with a resolution of about 0.01 cm−1 from 2800 to 3200 cm−1, using the Kitt Peak National Observatory Solar Fourier Transform Spectrometer. The ν2 band and the high order Coriolis coupled ν3 and 2ν5 bands have been analyzed rotationally. Several hundred transitions have been fitted and accurate band origins and rotational constants have been determined for each of the bands.