Synchrotron infrared spectroscopy of the ν4, ν8, ν10, ν11 and ν14 fundamental bands of thiirane

Abstract

The high-resolution spectrum of thiirane has been recorded using the far-infrared beamline at the Australian synchrotron facility. Spectra have been recorded between 700cm−1 and 1200cm−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 (1024cm−1) and the ν14 (1050cm−1) fundamental bands as well as in the ν11 (825cm−1) and the ν8 (895cm−1) fundamental bands. The ν10 (945cm−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.