On the high resolution spectroscopy and intramolecular potential function of SO2 |
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| Authors: | ON Ulenikov ES Bekhtereva S Alanko V-M Horneman OV Gromova C Leroy |
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| Institution: | aLaboratory of Molecular Spectroscopy, Physics Department, Tomsk State University, Tomsk 634050, Russia;bDepartment of Physical Sciences, University of Oulu, P.O. Box 3000, FIN-90014, Finland;cInstitut Carnot de Bourgogne-UMR 5209 CNRS, Université de Bourgogne B.P. 47870, F-21078 Dijon Cedex, France |
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| Abstract: | Two weak stretching bands, ν1 + 3ν3 and 3ν1 + ν3, of the sulfur dioxide molecule have been recorded at high resolution and analyzed for the first time with using a Fourier transform Bruker IFS-120 HR interferometer. About 1000 transitions with Jmax. = 51,  , and 900 transitions with Jmax. = 53,  have been assigned to the bands ν1 + 3ν3 and 3ν1 + ν3, respectively. Analysis of the recorded spectra was made using the model of isolated vibrational states. Parameters obtained from the fit reproduce the initial experimental ro-vibrational energies with the rms deviation of 0.0006 and 0.0012 cm−1 for the bands, 3ν1 + ν3 and ν1 + 3ν3, respectively. The problem of determination of the intramolecular potential function of SO2 is discussed. |
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| Keywords: | Sulfur dioxide High-resolution spectra Spectroscopic parameters Potential function |
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