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High-Resolution FTIR Spectra of CD235Cl2: Analysis of the ν3/ν7/ν9 Triad

✍ Scribed by Marcel Snels; Giuseppe D'Amico; El Bachir Mkadmi

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
138 KB
Volume
216
Category
Article
ISSN
0022-2852

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✦ Synopsis

The infrared spectra of isotopically pure CD 2 35 Cl 2 have been recorded at a resolution of 0.0026 cm -1 (FWHM) in the range 600-1160 cm -1 with a Bruker IFS 120 HR Fourier transform interferometer. The absorption between 670 and 750 cm -1 is due to three fundamentals, ν 3 (weak), ν 7 (very weak), and ν 9 (strong). A satisfactory analysis of the observed spectra has been obtained by including a c-Coriolis coupling between ν 3 and ν 9 and a b-Coriolis term between ν 7 and ν 9 . Although no transitions could be observed for the very weak ν 7 band, its band origin could be estimated from the Coriolis interaction with ν 9 . From the analysis of about 4200 assigned transitions of the ν 3 and ν 9 bands, excited state constants have been determined up to sextic terms. The Coriolis parameters obtained are compared to those calculated from a harmonic force field.

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