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The 13C hyperfine constants of HCS and HSC studied by microwave spectroscopy

✍ Scribed by Hideta Habara; Satoshi Yamamoto

Publisher: Elsevier Science
Year: 2003
Tongue: English
Weight: 138 KB
Volume: 219
Category: Article
ISSN: 0022-2852
DOI: 10.1016/s0022-2852(03)00007-9

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✦ Synopsis

The 13 C hyperfine constants of the H 13 CS and HS 13 C radicals are determined by microwave spectroscopy. For H 13 CS, the 1 01 -0 00 rotational transition is measured at 38.5 GHz with a Fourier transform microwave spectrometer, and two 13 C hyperfine constants are determined. They are well interpreted in terms of a relatively large HCS bonding angle (132.8°). For HS 13 C, the N ¼ 7-6, 9-8, and 10-9 rotational transitions are measured in the 268-384 GHz region by using a source modulation spectrometer combined with a free-space discharge cell, and five 13 C hyperfine constants including the nuclear spin-rotation constant, C aa , are determined. From the 13 C hyperfine constants, the p character of the unpaired electron orbital on the carbon atom is estimated to be 66.5%, supporting a classical resonance picture; _

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