Fourier Transform Microwave Spectroscopic Investigation
of Carbonylsulfide Loosely Bound to Two Helium Atoms.
Yunjie Xu and Wolfgang Jäger
Department of Chemistry, University of Alberta, Edmonton AB T6G 2G2, Canada
Rotational spectra of the van der Waals complex of carbonylsulfide (OCS) loosely bound to two helium atoms were investigated using a cavity Fourier transform microwave (MW) spectrometer and a MW-MW double resonance spectrometer. Seven isotopomers, namely those with 16O12C32S, 16O12C34S, 16O13C32S, 16O12C33S, 18O13C32S, 16O13C34S, and 17O13C32S were studied. Nuclear hyperfine structures due to the quadrupolar 33S and 17O nuclei were observed and analyzed. The interesting dynamics associated with this cluster will be presented and discussed.