Fourier-transform microwave and submillimeter-wave spectroscopy of chloroiodomethane, CH2ICl |
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| Authors: | S. Bailleux H. Ozeki S. Sakai T. Okabayashi P. Kania D. Duflot |
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| Affiliation: | aLaboratoire de Physique des Lasers, Atomes et Molécules, UMR CNRS 8523, Université Lille 1, F-59655 Villeneuve d’Ascq Cedex, France;bDepartment of Environmental Science, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi 274-8510, Japan;cGraduate School of Science and Technology, Shizuoka University, Oya 836, Surugaku, Shizuoka 422-8529, Japan;dInstitute of Chemical Technology, Department of Analytical Chemistry, Technická 5, 166 28 Prague 6, Czech Republic |
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| Abstract: | Guided by a previous microwave study (9–35 GHz), the rotational spectrum of both chlorine isotopologues of chloroiodomethane in its vibrational and electronic ground state has been re-investigated in the microwave region and extended to the millimeter/submillimeter-wave region. Weak a-type transitions have been recorded by Fourier transform microwave spectroscopy below 20 GHz whilst strong b-type rotational transitions have been recorded between 15 and 646 GHz, corresponding to energy levels with J″ ≤ 108 and  . Molecular constants including those describing the hyperfine structures owing to the two halogen atoms were accurately determined for both species from the least-squares analysis of a total of 1475 distinct transition frequencies (of which 906 belong to the CH2I35Cl isotopologue). The two sets of rotational constants allowed us to derive an r0 structure of CH2ICl. |
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| Keywords: | CH2ICl Fourier-transform spectroscopy Millimeter-wave spectroscopy Hyperfine structure |
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