===== On Vinylamine and Ethylamine in Space =====

S. Zeng, I. Jiménez-Serra, V. M. Rivilla, J. Martín-Pintado, L. F. Rodríguez-Almeida, B. Tercero, P. de Vicente, F. Rico-Villas, L. Colzi, S. Martín, and M. A. Requena-Torres\\
reported on\\
**[[https://doi.org/10.3847/2041-8213/ac2c7e|Probing the Chemical Complexity of Amines in the ISM: Detection of Vinylamine (C<sub>2</sub>H<sub>3</sub>NH<sub>2</sub>) and Tentative Detection of Ethylamine (C<sub>2</sub>H<sub>5</sub>NH<sub>2</sub>)]]**\\
//Astrophys. J. Lett.// **920** (2021), Art. No. L27.\\ 
Vinylamine (C<sub>2</sub>H<sub>3</sub>NH<sub>2</sub>) was detected through five un- or slightly blended transitions and four partially blended transitions with 4 ≤ //J// ≤ 9 and //K<sub>a</sub>// ≤ 3 in the course of an unbiased molecular line survey of the quiescent giant molecular cloud G+0.693−0.027, about 1' north-east of Sagittarius B2(N), carried out with the IRAM 30 m dish at 3 mm. The lines were modeled quite well employing an LTE fit with //T//<sub>rot</sub> = 18 ± 3 K. Vinylamine is about a factor of 50 less abundant than methylamine.\\
Using additional observations with the Yebes 40 m dish at 7 mm, the authors identify tentatively four lines of ethylamine (C<sub>2</sub>H<sub>5</sub>NH<sub>2</sub>) with modest signal-to-noise ratio that appear to be not or only slightly blended and three that are somewhat more blended. The fit results suggest that ethylamine would be about a factor of 125 less abundant than methylamine. The identification appears to be very reasonable. Therefore, the molecule shows now up in the table as tentatively detected.\\

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Contributor(s): H. S. P. Müller; 12, 2021; 03, 2022

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