Knowledge Bank

The infrared spectrum of the $X2\Pi$ state of CBr from 680 - 750 $cm-1$ has been measured using diode laser absorption spectroscopy. The CBr radicals were produced by 193 nm excimer photolysis of bromoform. Transitions belonging to the $v=1\leftarrow 0,2\leftarrow 1,3\leftarrow 2$ and $4\leftarrow 3$ bands of both isotopomers, $C79$Br and $C81$Br have been identified. Employing {case}(a) matrix elements, spectroscopic parameters were obtained from a least squares fit where the transition frequencies of both isotopomers were fitted simultaneously. The results were used to obtain a Rydberg-Klein-Rees (RKR) potential. Additionally, the kinetics of the CBr + $O2$ reaction were investigated. This is first recording of vibrational spectra of CBr. Acknowledgements: This work was carried out at Brookhaven National Laboratory under Contract No. DE-AC02-76CH00016 with the U.S. Department of Energy and support by its Division of Chemical Sciences, Office of Basic Energy Sciences. Support was also provided by a NATO Collaborative Research Grant, No. CRG 940066.