W.F. Wang

High resolution FTIR spectrum of the v1 band of bromochloromethane

Abstract The IR spectrum of the v 1 band of natural bromochloromethane (CH 2 BrCI) has been recorded at a resolution of 0.008cm −1 in the region 2940–3060 cm −1 on a BOMEM DA3.002 Fourier-transform spectrometer. The rovibrational analysis on the strong Q branch of this B -type band has been performed in the prolate symmetry top approximation due to the fairly small difference between constants B and C . A normal linear least-square fitting of the identified P , R Q K ( J ) clusters provided the corresponding excited state molecular parameters for three of the four naturally existing isotopomers of bromochloromethane with a standard error of about 0.02 cm −1 .