Journal article
High-resolution infrared spectroscopy of the interacting ν9, ν5+ν6 and 3ν6 levels of CH279BrF
Università Ca′ Foscari Venezia, Dipartimento di Scienze Molecolari e Nanosistemi, D.D. 2137, I-30123 Venezia, Italy1
University of Copenhagen, Department of Chemistry, Universitetsparken 5, DK-2100 Copenhagen, Denmark2
The high-resolution (0.0030cm−1) Fourier transform infrared spectrum of CH279BrF has been studied in part of the atmospheric window between 910 and 980cm−1, the region of the ν9 (935.847cm−1) and ν5+ν6 (961.239cm−1) bands. The ν9 fundamental consists of a pseudo a-type band induced by Coriolis coupling with ν5+ν6, in turn exhibiting a predominant a-type structure.
Several interactions connecting these levels and the dark state 3ν6 have been assessed. The whole data set is treated using Watson’s A-reduced Hamiltonian in the Ir representation implemented with first order a- and b- and c-type Coriolis terms. A detailed analysis of the rotational structure yields a set of accurate upper-state parameters up to quartic distortion terms for ν9 and ν5+ν6.
In addition, spectroscopic information about the dark ternary overtone of ν6 has been obtained.
| Language: | English |
|---|---|
| Year: | 2011 |
| Pages: | 226-230 |
| ISSN: | 1096083x and 00222852 |
| Types: | Journal article |
| DOI: | 10.1016/j.jms.2011.07.006 |
