Rotational Fingerprints of Vinylketene for Astronomical Observations

Abstract A high degree of isomerism in the realm interstellar molecules stimulates systematic astronomical investigations members different families isomers. Among them, vinyl-bearing compounds have kindled considerable interest due to recent detections vinylamine, vinylacetylene, and vinylcyanoacetylene. Herein, we open possibility search for vinylketene space by means its rotational transitions. The pure spectrum title molecule was recorded frequency regions 195–218 293–324 GHz an improved extended set spectroscopic parameters has been obtained most stable trans conformer. In addition, signatures molecular constants less cis form are reported first time. We provide a catalog precise transition frequencies intensities community pave way toward explorations C 4 H O isomer family.