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On the Detection of Protonated Butynedinitrile, NC<sub>4</sub>NH<sup>+</sup>, in Space
M. Agúndez, C. Cabezas, N. Marcelino, R. Fuentetaja, B. Tercero, P. de Vicente, and J. Cernicharo
reported on
Discovery of Interstellar NC<sub>4</sub>NH<sup>+</sup>: Dicyanopolyynes are indeed Abundant in Space,
Astron. Astrophys. 669, Art. No. L1 (2022).
Six consecutive transitions with 12 ≤ J“ ≤ 17 between 33.6 and 46.6 GHz were identified 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 31.0 and 50.3 GHz with good signal-to-noise ratio, except for the highest J, where it was still reasonable. The molecule was identified based on the proximity to scaled spectroscopic parameters from a quantum-chemical calculation.
Contributor(s): H. S. P. Müller; 07, 2017; 12, 2017; 12, 2021