The microwave spectrum of thiirane in excited vibrational states.
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概要
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The microwave spectra in the ground and five low-lying vibrational states of <SUP>12</SUP>C<SUB>2</SUB>H<SUB>4</SUB><SUP>32</SUP>S and in the ground state of <SUP>12</SUP>C<SUP>13</SUP>CH<SUB>4</SUB><SUP>32</SUP>S and <SUP>12</SUP>C<SUB>2</SUB>H<SUB>4</SUB><SUP>34</SUP>S have been assigned to high-<I>J</I> transitions. The rotational and centrifugal distortion constants were derived. Four of the five vibrational states were found to be in Coriolis interaction in pairs; one of the pairs was identified as the symmetric and antisymmetric ring deformation modes, ν<SUB>5</SUB>(A<SUB>1</SUB>) and ν<SUB>12</SUB>(B<SUB>1</SUB>), but another pair was unexplicable from any of the previously reported vibrational assignments. The infrared and Raman spectra in the liquid and gas phases were examined, and the latter pair of vibrations was interpreted as ν<SUB>14</SUB>(B<SUB>2</SUB>) at 945 cm<SUP>−1</SUP> and ν<SUB>8</SUB>(A<SUB>2</SUB>) at about 970 cm<SUP>−1</SUP>. This novel assignment of ν<SUB>8</SUB> around 970 cm<SUP>−1</SUP> was based on not only the results of microwave spectroscopy, but also on the observation of an unsymmetric band contour in the infrared spectrum of the gaseous sample.
- 公益社団法人 日本化学会の論文
著者
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Hirose Chiaki
Research Laboratory Of Resources Utilization Tokyo Institute Of Technology
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Maeda Shiro
Research Laboratory Of Resources Utilization Tokyo Institute Of Technology
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Okiye Kazuhiro
Research Laboratory of Resources Utilization, Tokyo Institute of Technology
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- The microwave spectrum of thiirane in excited vibrational states.