MOLECULAR STRUCTURE, FORCE FIELD, AND CORIOLIS INTERACTION OF HBO

Author Institution: Kanagawa Institute of Technology; College of General Education, the University of Tokyo; Institute for Molecular Science, the University of TokyoThe vibrational frequencies and the rotational, vibration-rotation, $\ell$-type doubling, and centrifugal distortion constants determined for the six isotopic species, $H^{11}BO, H^{10}BO, D^{11}BO, D^{10}BO, H^{11}B^{18}O$, and $H^{10}B^{18}O$, were simultaneously analyzed to derive the equilibrium molecular structure and the harmonic and third-order anharmonic potential constants of the HBO molecule. The equilibrium bond lengths thus obtained are $r_{e}(H-B)=1.16667(41){\AA}$ and $r_{e}(B-O)=1.20068(10){\AA}$, and the substituted, average, and effective structures were also calculated for comparison. We found the $\nu_{1}$ and $\nu_{2} - \nu_{3}$ states of DBO being coupled by a Coriolis interaction, and analyzed the coupling by observing the vibration-rotation and rotational spectra associated with the $\nu_{1}$ state