===== 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\\
**[[https://doi.org/10.3847/2041-8213/ac92f4|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.\\ 
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Contributor(s): H. S. P. Müller; 10, 2022

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