The rotational spectrum of C5S in the X 1Sigma+(v = 0) ground state has been observed for the first time using a Fabry-Perot-type Fourier transform microwave spectrometer combined with a pulsed discharge nozzle. C5S was generated by a discharge in a mixture of CS2 and C2H2 diluted in Ar, and subsequently cooled down to a few kelvins in a supersonic jet. Eight rotational transitions of C5 32S have been observed in the 5-20 GHz region. Three lines for the less abundant S-34 species have also been detected to confirm the carrier of the observed lines to be C5S. Determined spectroscopic constants will allow a deep radio astronomical search for C5S in interstellar clouds and circumstellar envelopes of late-type stars.
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Kasai et al. (1993) studied this question.
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