Millimeter Wave Spectrum and Molecular Structure of Oxygen Difluoride

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Abstract
The molecular structure of oxygen difluoride (OF2) has been studied by microwave spectroscopy techniques. A video microwave spectrometer was used to find 13 rotational absorption lines. Klystron‐driven crystal harmonic generators were used as energy sources for the spectrometer. The frequencies of the lines were measured with a precise frequency standard. Nine of the lines were assigned to rotational transitions of OF2 using a graphical method. The three average rotational constantsA, B, and C were determined from the exact energy solutions for the rotational transitions. The values for the rotational constants together with the effective moments of inertia calculated from them were A=61 567.71 Mc, IA =8.21096 amu, A2; B=11 066.54 Mc, IB =45.6809; C=9 343.85 Mc; IC =54.1088 amu, A2. The effective values for the oxygen fluorine interatomic distance and the apex angle 2θ calculated from IA and IB were r=1.3896 A, 2θ=104.163. The rotational inertial defect was found to be +0.217 amu, A2.