Synchrotron infrared spectroscopy of the v(4), v(8), v(10), v(11) and v(14) fundamental bands of thiirane

The high-resolution spectrum of thiirane has been recorded using the far-infrared beamline at the Australian synchrotron facility. Spectra have been recorded between 700 cm[Superscript: −1] and 1200 cm[Superscript: −1] and ro-vibrational transitions associated with four fundamental bands of thiirane have been observed and assigned. The effects of Coriolis coupling were observed in the upper energy levels associated with the ν4 (1024 cm[Superscript: −1]) and the ν14 (1050 cm[Superscript: −1]) fundamental bands as well as in the ν11 (825 cm[Superscript: −1]) and the ν8 (895 cm[Superscript: −1]) fundamental bands. The ν10 (945 cm[Superscript: −1]) fundamental band was also observed and was found to have no significant perturbations associated with it. For each of the observed bands rotational and centrifugal distortion constants have been evaluated, while for all but the ν10 fundamental band, Coriolis interaction parameters have been determined for the upper states. The ground state constants have also been further refined.