Abstract
The spectra of CH2F37Cl (95% isotopically pure sample) have been recorded at high resolution with a tunable diode laser spectrometer in the regions 979–1030 and 1108–1136 cm−1. The spectral analysis allowed us to assign about 2000 lines (J≤ 61,Ka≤ 26) of the ν9band (ν0= 1001.9360 cm−1), which, besides the expectedc-type component, shows a more intense Coriolis-induced parallel component deriving its intensity from mixing with the ν4vibrational state. In addition, the assignments of the ν4band (ν0= 1067.7138 cm−1), previously investigated, have been extended to higherKavalues and about 1300 new lines (J≤ 69, 17 ≤Ka≤ 26) have been identified. The ν4and ν9bands have been fitted simultaneously to account for the first-ordera- andb-type Coriolis coupling; interaction constants and excited state parameters up to the sextic terms have been obtained using Watson'sA-reduction Hamiltonian in theIrrepresentation.
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