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High-Resolution FTIR Spectrum of the ν9 Band of Ethylene-D4 (C2D4)

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

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
96 KB
Volume
202
Category
Article
ISSN
0022-2852

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✦ Synopsis

The spectrum of the 9 fundamental band of ethylene-d 4 (C 2 D 4 ) has been measured with an unapodized resolution of 0.004 cm Ϫ1 in the frequency range of 2300 -2400 cm Ϫ1 using a Fourier transform infrared spectrometer. A total of 549 transitions have been assigned and fitted using a Watson's A-reduced Hamiltonian in the I r representation to derive rovibrational constants for the upper state (v 9 ϭ 1) up to five quartic terms with a standard deviation of 0.00087 cm Ϫ1 . They represent the most accurate rovibrational constants for the 9 band so far. About 30 transitions of KЈ a ϭ 0, one transition of 9 which were identified to be perturbed possibly by the nearby 11 and 2 ϩ 12 transitions, were not included in the final fit. The 9 band of C 2 D 4 was found to be basically B-type with an unperturbed band center at 2341.836 94 Ϯ 0.000 13 cm Ϫ1 .

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