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The Coriolis Interaction between the ν9 and ν7 Fundamental Bands of Methylene Fluoride

✍ Scribed by K.L. Goh; T.L. Tan; P.P. Ong; H.H. Teo

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
90 KB
Volume
201
Category
Article
ISSN
0022-2852

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✦ Synopsis

The infrared spectrum of the 7 and 9 bands of methylene fluoride-d 2 (CD 2 F 2 ) has been recorded with an unapodized resolution of 0.0024 cm Ϫ1 in the frequency range of 940 -1030 cm Ϫ1 using the Fourier transform technique. A weak b-type Coriolis interaction term was found to couple these two vibrational states with band centers about 42 cm Ϫ1 apart. By fitting a total of 1031 infrared transitions of both 7 and 9 with a standard deviation of 0.0011 cm Ϫ1 using a Watson's A-reduced Hamiltonian in the I r representation with the inclusion of a b-type Coriolis resonance term, two sets of rovibrational constants for 7 ϭ 1 and 9 ϭ 1 states up to sextic order were derived. The 7 band is C type, while the 9 band is A type with band centers at 961.8958 Ϯ 0.0005 and 1003.7421 Ϯ 0.0001 cm Ϫ1 , respectively.

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