Abstract
For the first time the infrared spectrum of F2BOH in the gas phase has been observed. After optimizing the conditions for the synthesis we have been able to obtain high-resolution (2.4–3.3×10−3 cm−1) infrared spectra in the ν8, ν9, and ν4 regions with both natural and 11B monoisotopic material. Analyses of the ν8 (BF2 out-of-plane bending) and ν9 (OH torsion) fundamental bands located at 684.160 and 522.870 cm−1, respectively, for F211BOH are presented here. Existing J≤10 microwave transitions were combined with novel ground state combination differences with J≤55 formed from A-type (ν4) and C-type (ν8, ν9) bands to yield substantially improved and extended ground state parameters. Using a standard Watson-type Hamiltonian, 81 and 91 upper state parameters were obtained by fitting about 2000 lines each with σ(fit) ca. 3.5×10−4 cm−1. The 81 and 91 states both appear to be unperturbed, as indicated by the agreement of the ground and excited state centrifugal distortion constants.
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