LABORATORY DETECTION OF LINEAR $SiC_{n}S (n=2-4, 6)$
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Date
2001
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The linear singlet chains $SiC_{2}S$, $SiC_{4}S$ and $SiC_{4}S$, as well as the triplet $SiC_{3}S$, have been detected among the products of a laboratory discharge on the basis of high level coupled cluster ab-initio calculations and characterized by Fourier transform microwave spectroscopy. The molecules were generated in a supersonic expansion of diluted mixtures of silane, diacetylene and carbon disulfide in Ne. Their rotational and centrifugal distortion constants were accurately determined, as was the spin-spin coupling constant $\lambda$ for triplet $SiC_{3}S$. The microwave spectra of the $^{29}Si$, $^{34}S$ and both $^{13}C$ isotopic species of $SiC_{2}S$ were measured, allowing a determination of the individual bond lengths. In addition, several satellite lines were observed near the rotational transitions of $SiC_{2}S$, which were identified as belonging to different bending and stretching vibrational excited states.
Description
Author Institution: Harvard-Smithsonian Center for Astrophysics; Harvard University; Division of Engineering and Applied Sciences, Universit\""at G\""ottingen; Institut f\""ur Physikalische Chemie, Universit\""at G\""ottingen