Millimetre-wave spectrum of CF3Br

Abstract

The millimetre-wave rotational spectra of CF₃⁷⁹Br and CF₃⁸¹Br have been measured in the ground and low-lying excited states. Analysis of the ground-state spectra has yielded precise values of the rotational and centrifugal distortion constants, as well as bromine nuclear quadrupole coupling constants. For the doubly degenerate states the Coriolis coupling constants ζ₅ and ζ₆ have also been determined; the values are in good agreement with those obtained from infrared and Raman band contour analysis.