Knowledge Bank

The rotational spectra of the three main isotopic species of $Br2O$ have been studied in the submillimeter region. The combination of a relatively large A rotational constant along with small values for B and C give rise to transitions involving a large range of J and $Ka$ quantum numbers in the observed spectral region. Precise rotational and centrifugal distortion constants have been determined. Quadrupole splittings are large and can be observed even for J > 90. The spectrum, molecular structure, harmonic force field, and quadrupole coupling will be discussed.