Microwave Spectrum of BF2OH

Abstract
The microwave spectrum of BF2OH has been observed and assigned. The rotational constants of the isotopic species 11BF216OH, 10BF216OH, 11BF216OD, 10BF216OD, 11BF218OH, and 10BF218OH have been determined. The inertial defects prove that the molecule is planar. Assuming the two BF bond lengths are the same, the bond distances and angles are found to be: rBF = 1.32 Å, rBO = 1.34 Å, rOH = 0.94 Å, ∠FBF=118°, ∠BOH=114.1°, ∠FBO=122.8° (this is the angle cis to the OH). The dipole moment is 1.86± 0.02 D. The dipole moment makes an angle of 50° with the BO bond with dipole moment line on the same side of the BO bond as the hydrogen.