Abstract
The rotational spectra of 79Br12C15N and 81Br12C15N in the low-lying 01 10, 1000, 0200, and 0220 vibrational states have been observed in the millimeter-wave region, and the ν3 fundamental band of both 14N- and 15N-containing species has been recorded from 2125 to 2215 cm−1 with a diode laser spectrometer. A very precise equilibrium structure has been calculated for cyanogen bromide using the obtained data together with those already known for the normal isotopomers. The ground state rotational spectra of 79Br13C15N and 81Br13C15N have been also observed, so that r0, rs, and rm structures could be evaluated from the ground state moments of inertia of eight different isotopic species.
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