L. Bizzocchi, D. Prudenzano, V. M. Rivilla, A. Pietropolli-Charmet, B. M. Giuliano, P. Caselli, J. Martín-Pintado, I. Jiménez-Serra, S. Martín, M. A. Requena-Torres, F. Rico-Villas, S. Zeng, and J.-C. Guillemin
reported on
Propargylimine in the Laboratory and in Space: Millimetre-wave Spectroscopy and its First Detection in the ISM
Astron. Astrophys. 628, Art. No. A10 (2019).
A total of 18 rotational transitions of the lower energy Z-conformer of iminopropyne, also known as propargylamine, were detected 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), with the IRAM 30 m dish at 3 and 2 mm. Several lines, however, are severely blended, but about one third are not or only somewhat blended. The inferred rotational temperature of 8 K is a value typical for dark clouds. It explains the non-detection of the slightly higher lying E-conformer. The column density is about a factor of 4 lower than vinyl cyanide, a tautomer of iminopropyne.

Contributor(s): H. S. P. Müller; 08, 2020