Microwave spectrum of oxygen difluoride in vibrationally excited states; ν1 - 2 ν2 Fermi resonance and equilibrium structure

Abstract

Microwave absorption spectra of the oxygen difluoride molecule in the vibrationally excited states with v 1 = 1, v 2 = 1 and2, and v 3 = 1 were analyzed with consideration for the Fermi resonance between ν 1 and 2 ν 2 vibrational levels. The degree of mixing between the two states was obtained. Quadratic force field was determined from the inertia defects. Cubic potential constants and equilibrium structure were obtained from the vibration-rotation interaction constants. The average structure r z for the excited states of various normal modes was computed to realize the deformation of the molecule by the excitation of vibrational motions.