Bunn Hayley, Hull Killian, Miller Isaac, Raston Paul L
Department of Chemistry , University of Adelaide , Adelaide , South Australia 5005 , Australia.
Department of Chemistry and Biochemistry , James Madison University , Harrisonburg , Virginia 22807 , United States.
J Phys Chem A. 2020 Jan 30;124(4):704-710. doi: 10.1021/acs.jpca.9b11514. Epub 2020 Jan 16.
The far-infrared spectrum (100-500 cm) of a isotopologue of the astrophysically important molecule, vinyl alcohol, is reported. We observed several low energy (OD) torsional bands: the fundamental and first two hot bands of the rotamer and the fundamental and first hot band of the (higher energy) rotamer. While the bands corresponding to the rotamer are somewhat obscured by rotational lines of water (making a full spectroscopic analysis unfeasible at this stage), the -vinyl alcohol bands are not, and a global fit was performed that included 4404 distinct infrared lines assigned in this work, in addition to 59 previously reported microwave lines. This simultaneous analysis of the torsional fundamental, torsional hot band, and pure rotational band of -vinyl alcohol allowed for determination of spectroscopic parameters in the first two torsionally excited states and for refinement of them in the ground state. These parameters should be useful in searches for both cold and warm CHCHOD in interstellar molecular clouds.
