R. Fuentetaja, C. Cabezas, M. Agúndez, B. Tercero, N. Marcelino, J. R. Pardo, P. de Vicente, and J. Cernicharo
reported on the
Discovery of CH<sub>2</sub>CCHC<sub>4</sub>H and a Rigorous Detection of H<sub>2</sub>CCCHC<sub>3</sub>N in TMC-1 with the QUIJOTE Line Survey
Astron. Astrophys. 663, Art. No. L3 (2022).
1,2-Heptadiene-4,6-diyne, also known as propadienylbutadiyne or allenyldiacetylene, was detected with the Yebes 40 m radio telescope between 31.2 and 43.0 GHz. 21 lines with 16 ≤ J ≤ 22 and Ka ≤ 2 were identified as being between unblended and not completely blended. Trot was determined as 9.0 ± 0.5 K. The isoelectronic H2CCCHC3N was identified in TMC-1 for the first time through individual lines. The CH2CCHC4H to H2CCCHC3N ratio was determined as 18 ± 4, somewhat higher than the C4H to C3N ratio of ~8. Similarly, the CH3C6H to CH2CCHC4H ratio is ~0.32, whereas the CH3C4H to CH2CCHC2H ratio is ~1.1.

Contributor(s): H. S. P. Müller; 07, 2022

  • molecules/ism/c7h4.txt
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