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Millimeter-wave spectrum of MgSH

Authors
Journal
Chemical Physics Letters
0009-2614
Publisher
Elsevier
Publication Date
Volume
334
Identifiers
DOI: 10.1016/s0009-2614(00)01396-8

Abstract

Abstract The pure rotational spectrum of MgSH was observed for the first time, using millimeter-wave absorption spectroscopy in the 280–365 GHz region. This short-lived gas phase free radical was produced in a high-temperature cell by the reaction of Mg metal vapor with H 2S in the presence of an electrical discharge. The spectrum was analyzed using an S-reduced asymmetric rotor Hamiltonian to obtain molecular parameters, including rotational, centrifugal distortion, and spin-rotation constants. The analysis of the spectrum indicated that MgSH is bent, in agreement with an ab initio calculation. The ∠Mg–S–H angle obtained from the analysis was 87.5 ± 6.7°, as compared to a calculated ab initio value of 91.1°.

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