Abstract
The ν4 fundamental band of (ν0 = 1068.517 cm−1), corresponding to the C–F stretching mode, has been measured at high resolution (0.002 cm−1) with a tunable diode laser spectrometer at a temperature of 240 K. The rotational structure of the a- and b-type components of the hybrid band has been extensively interpreted achieving high values of J and K a quantum numbers. Ground state constants up to sextic terms have been provided for the first time by using the combinations method from 11330 assigned transitions. The spectrum has been analysed using the A-reduced Watson's Hamiltonian in the Ir representation. From spectral simulations the dipole moment ratio |Δμ a/Δμ b| of the band has been estimated to be 1.8 ± 0.4. Additionally, simulations and comparisons with spectra of the natural isotopic sample are presented.
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