Fourier transform microwave spectra of a "new" isomer of OCS-CO2.
The rotational spectrum of a "new" isomer of OCS-CO(2) has been measured between 5 and 18 GHz using Fourier transform microwave spectroscopy. Both a- and b-type transitions of the parent dimer and the (13)CO(2)-containing isotopologue were fit and the resulting spectroscopic constants confirm that this is the planar O-interior, not-quite-as-parallel isomer that was experimentally observed for the first time in the recent infrared investigation of Dehghany et al. [J. Chem. Phys. 130, 224310 (2009)]. As in the infrared study, the microwave transitions of this isomer appear stronger than those of the previously reported lower energy isomer of OCS-CO(2) when helium is used as the backing gas for the supersonic expansion.
Sedo
Galen
G
Department of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada.
van Wijngaarden
Jennifer
J