The High-Resolution Infrared Spectrum of the ν5Band of Deuterated Formic Acid (DCOOH)

The Fourier transform infrared spectrum of the ν5band of deuterated formic acid (DCOOH) has been measured with a resolution of 0.004 cm−1in the frequency range of 1090–1180 cm−1. Using a Watson'sA-reduced Hamiltonian in theIrrepresentation, a total of 1731 assigned unperturbed transitions have...

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Bibliographic Details
Published in:Journal of molecular spectroscopy 1998-07, Vol.190 (1), p.125-129
Main Authors: Goh, K.L, Ong, P.P, Tan, T.L, Wang, W.F, Teo, H.H
Format: Article
Language:English
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Summary:The Fourier transform infrared spectrum of the ν5band of deuterated formic acid (DCOOH) has been measured with a resolution of 0.004 cm−1in the frequency range of 1090–1180 cm−1. Using a Watson'sA-reduced Hamiltonian in theIrrepresentation, a total of 1731 assigned unperturbed transitions have been analyzed to provide rovibrational constants for the upper state (v5= 1) with a standard deviation of 0.000363 cm−1. The band isAtype with an unperturbed band center at 1142.31075 ± 0.00002 cm−1. The band is expected to be perturbed by a nearby ν4band through a Fermi resonance term and possibly a Coriolis term. The resonance is particularly noticeable forKa= 10, and 11, at highJvalues. About 215 perturbed lines were identified but they were not included in the final fit.
ISSN:0022-2852
1096-083X
DOI:10.1006/jmsp.1998.7562