The vibration-rotation bands v2 and v5 of methyl bromide

Abstract
The infrared spectrum of CH3Br has been analyzed between 1 200 and 1 500 cm-1 taking into account the x - y Coriolis resonance between the two fundamental levels υ2 = 1 and υ 5 = 1. The band centers were found respectively at 1 305.907 and 1 442.885 cm-1 and the ζx2,5 coupling term was determined to be 0.617