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Microwave and submillimeterwave spectra of CH2DI and CHD2I |
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| Authors: | F Willaert K Kyllönen H Sarkkinen H Mäder |
| Institution: | a Laboratoire de Physique des Lasers, Atomes et Molécules, UMR CNRS 8523, Université de Lille I, 59655 Villeneuve d’Ascq Cedex, France b Department of Physical Sciences, P.O. Box 3000, FIN-90014 University of Oulu, Finland c Institut für Physikalische Chemie der Universität Kiel, Olshausenstr. 40, 24098 Kiel, Germany |
| Abstract: | The pure rotational spectra of CH2DI and CHD2I have been measured by microwave Fourier transform spectroscopy, millimeterwave spectroscopy and submillimeterwave spectroscopy. The quadrupole hyperfine structure due to iodine has been analyzed by direct diagonalization of the quadrupole tensor. For the J = 1-0 transition of the ground state of CH2DI, the quadrupole hyperfine structure due to deuterium could be resolved and the quadrupole coupling constant eQqaa(D) determined.Accurate rotational and centrifugal distortion constants (up to sextic terms) have been determined. They are compared to the constants derived from the ground state combination differences (GSCD). A good agreement is observed but it is also found that the two kinds of data (GSCD and microwave) are complementary and a combined fit allows us to significantly improve the accuracy of the constants. |
| Keywords: | Methyl iodide Microwave Submillimeterwave Rotation Quadrupole |
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