On the Detection of Cyanoindenes in the ISM

M. L. Sita, P. B. Changala, C. Xue, A. M. Burkhardt, C. N. Shingledecker, K. L. K. Lee, R. A. Loomis, E. Momjian, M. A. Siebert, D. Gupta, E. Herbst, A. J. Remijan, M. C. McCarthy, I. R. Cooke, and B. A. McGuire
reported on the
Discovery of Interstellar 2-Cyanoindene (2-C<sub>9</sub>H<sub>9</sub>CN) in GOTHAM Observations of TMC-1
Astrophys. J. Lett. 938, Art. No. L12 (2022).
The lowest energy isomer of the cyanoindenes was detected through the usual stacking technique employing observations of TMC-1 with the GBT between 6 and 40 GHz in the framework of the GOTHAM survey. Four other isomers were not detected, for two additional ones no laboratory data exist at present. The molecules is about a factor of 43 less abundant than the parent indene molecule. 1- and 2-cyanopentadiene are approximately factors of 14.5 and 63 less abundant than the parent molecule pentadiene.


Contributor(s): H. S. P. Müller; 10, 2022