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Fourier Transform Infrared Spectra of CH2DF: The ν5 and ν6 Bands

✍ Scribed by I.A. Atkinson; M.M. Law

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
111 KB
Volume
206
Category
Article
ISSN
0022-2852

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✦ Synopsis

Results of a high-resolution infrared study of the spectroscopy of monodeuterated methyl fluoride, CH 2 DF, are reported for the first time. Spectra ranging from 500 to 3300 cm -1 have been obtained and cover all the fundamental bands at resolutions down to 0.005 cm -1 . The two lowest energy fundamentals, the ν 5 and ν 6 bands, have been analyzed in detail. Since the molecule has C s symmetry, in principle both these bands are AB hybrids, since they belong to the irreducible representation A . However, it was found that both are almost pure A-type bands. A total of 597 A-type lines of the ν 5 band and 619 A-type lines of the ν 6 band have been assigned. Vibrational and rotational spectroscopic constants have been determined by least-squares fitting to the data. An improved band center for ν 7 is also reported.

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