ANALYSIS OF THE $\nu_{2}$,$\nu_{5}$ AND $\nu_{3}+\nu_{6}$ BANDS OF $CHF_{3}$, IN THE 8-9 MICRON REGION
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Date
1983
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Ohio State University
Abstract
The Fourier Transform infrared spectrum of $CHF_{3}$ has been obtained between 1000 and $2000 cm^{-1}$ with a resolution of $0.005 cm^{-1}$ in the region $1110-1250 cm^{-1}$, three bands are to be considered, namely $\nu_{2}$ at $1141 cm^{-1}$, $\nu_{5}$ at 1158 and $\nu_{3}+\nu_{6}$ at $1208 cm^{-1}$. The two former are interacting through an X--Y type Coriolis resonance. The last one is affected by a very strong $\ell$(2,2) resonance, as it was the case in $\nu_{6}$. Moreover $\nu_{5}$ and $\nu_{3}+\nu_{6}$ are linked by a Fermi interaction. We shall explain how it was possible to assign transitions among this extremely dense Spectrum of about 6000 lines. Preliminary molecular constants will also be given.
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Author Institution: Laboratoire d' Infrarouge, Universit\'{e} de paris-Sud