Pure rotational spectrum of cyanopropyne in the v12 = 1 vibrational state |
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| Institution: | 1. Institut für Ionenphysik und Angewandte Physik and Center for Molecular Biosciences Innsbruck (CMBI), Leopold Franzens Universität Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria;2. Université de Lyon, Université Claude Bernard Lyon 1, CNRS/IN2P3, UMR5822, Institut de Physique Nucléaire de Lyon, 43 Bd du 11 novembre 1918, 69622 Villeurbanne, France;3. Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226 031, India;4. Analytical Chemistry and Mass Spectrometry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India;1. Department of Chemistry and Science Institute, University of Iceland, Dunhagi 3, 107, Reykjavik, Iceland;2. Department of Inorganic Spectroscopy, Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse, 34-36, 45470, Mülheim an der Ruhr, Germany;3. Department of Chemistry, Johns Hopkins University, Baltimore, MD, 21218, USA;4. Department of Chemistry, Institute of Inorganic and Analytical Chemistry, Goethe-University, 60438 Frankfurt, Germany |
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| Abstract: | The micoowave and millimeter-wave spectrum of cyanopropyne, CH3CCCN, in the lowest excited vibrational state, v12 = 1 (E), has been observed in the frequency range from 8 to 220 GHz. The measurements up to the J = 53−52 transitions allowed us to determine the Coriolis coupling term and the l-type interaction term very precisely in addition to some of the sextic centrifugal terms. The contribution of the r-type interaction (Δk = ±1, Δl = ±2) has been found to be correlated with that of ηJ, a centrifugal correction term to the first-order Coriolis interaction. |
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