Some molecular properties of carbonyl bromide determined by microwave spectroscopy

Abstract

A microwave investigation from 25–165 GHz has been made of the ground state rotational transitions of OC⁷⁹Br₂, OC⁷⁹Br⁸¹Br and OC⁸¹Br₂. The r₀ structure gives the CO distance as 117.2 pm, the C–Br distance as 191.7 pm and the BrCBr angle as 112.3°, and the C_2v structure is fully confirmed. Centrifugal distortion constants and quadrupole coupling information were obtained and a force-field consistent with the centrifugal distortion and the known vibration frequencies is evaluated.