===== On Propargyl in the ISM =====

M. Agúndez, C. Cabezas, B. Tercero, N. Marcelino, J. D. Gallego, P. de Vicente, and J. Cernicharo\\
reported on\\
**[[https://doi.org/10.1051/0004-6361/202140553|Discovery of the propargyl radical (CH<sub>2</sub>CCH) in TMC-1: One of the most abundant radicals ever found and a key species for cyclization to benzene in cold dark clouds]]**\\
//Astron. Astrophys.// **647**, Art. No. L10 (2021).\\
The propargyl radical was identified through the six strongest hyperfine components of the 2<sub>02</sub> − 1<sub>01</sub> rotational transition around 37460 MHz in the course of a molecular line survey of the prototypical cold dark molecular cloud TMC-1 carried out with the Yebes 40 m radio telescope between 32.8 and 49.2 GHz. The column density of CH<sub>2</sub>CCH is only slightly smaller than that of CH<sub>3</sub>CCH, a closed shell species.\\



----

Contributor(s): H. S. P. Müller; 05, 2021

----