Infrared Diode Laser Spectroscopy of Fundamental and Hot Bands of BBr (X1Sigma+).
Infrared absorption spectra of the four common isotopic forms of the transient molecule BBr (11B79Br, 11B81Br, 10B79Br, and 10B81Br) have been observed in natural abundance. The spectra were detected in the region between 650 and 720 cm-1 using diode laser spectroscopy of a BBr3/He ac discharge. Over 150 lines consisting of both fundamental and hot bands up to v" = 5 have been fitted to Watson's isotopically invariant coefficients (Ukl). Spectroscopic parameters for each isotopomer could be derived from these coefficients; for 11B79Br, omegae = 685.1892(15) cm-1 and omegaexe = 3.73632(95) cm-1. The equilibrium dissociation energy obtained from Dunham's expanded Morse potential is 32 711(43) cm-1. Copyright 1998 Academic Press.
Hunt
NT
Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom
Fan
WY
Liu
Z
Davies
PB