ROTATIONAL ANALYSIS OF BANDS OF THE 3400 \AA \ SYSTEM OF DISULPHUR MONOXIDE $(S_{2}O)$
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Date
1977
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Ohio State University
Abstract
The short-lived species $S_{2}O$ may be prepared in a flow system by passing argon containing a small amount of sulphur vapor and oxygen through a microwave discharge. Various bands at the long wavelength end of the 3400 \AA \ system of $S_{2}O$ have been photographed at high dispersion. The excited state levels are found to be predissociated homogeneously above 31 200 $cm^{-1}$, but the rotational structure is sharp and apparently unperturbed at lower energy. Preliminary results from the rotational analysis show that the bands are type A-B hybrids, so that the transition is $^{1}A^{\prime} - ^{1}A^{\prime}$; the bands are strongly red-degraded, with the rotational constant A dropping from $1.40 cm^{-1}$ in the ground state to about $0.82 cm^{-1}$ in the upper state. The $^{1}A^{\prime}$ upper state appears to be the analogue of the $\stackrel{\sim }{C}{^{1}B_{2}}$ upper state of the 2350 \AA \ bands of $SO_{2}$.
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Author Institution: Department of Chemistry, University of British Columbia