J Cernicharo1, N Marcelino1, M Agúndez1, C Bermúdez1, C Cabezas1, B Tercero2,3, J R Pardo1. 1. Grupo de Astrofísica Molecular, Instituto de Física Fundamental (IFF-CSIC), C/ Serrano 121, 28006 Madrid, Spain. 2. Centro de Desarrollos Tecnológicos, Observatorio de Yebes (IGN), 19141 Yebes, Guadalajara, Spain. 3. Observatorio Astronómico Nacional (OAN, IGN), Madrid, Spain.
Abstract
We present a study of the isocyano isomers of the cyanopolyynes HC3N, HC5N, and HC7N in TMC-1 and IRC+10216 carried out with the Yebes 40m radio telescope. This study has enabled us to report the detection, for the first time in space, of HCCCCNC in TMC-1 and to give upper limits for HC6NC in the same source. In addition, the deuterated isotopologues of HCCNC and HNCCC were detected, along with all 13C substitutions of HCCNC, also for the first time in space. The abundance ratios of HC3N and HC5N, with their isomers, are very different in TMC-1 and IRC+10216, namely, N(HC5N)/N(HC4NC) is ~300 and ≥2100, respectively. We discuss the chemistry of the metastable isomers of cyanopolyynes in terms of the most likely formation pathways and by comparing observational abundance ratios between different sources.
We present a study of the isocyano isomers of the cyanopolyynesn class="Chemical">HC3N, HC5N, and HC7N in TMC-1 and IRC+10216 carried out with the Yebes 40m radio telescope. This study has enabled us to report the detection, for the first time in space, of HCCCCNC in TMC-1 and to give upper limits for HC6NC in the same source. In addition, the deuterated isotopologues of HCCNC and HNCCC were detected, along with all 13C substitutions of HCCNC, also for the first time in space. The abundance ratios of HC3N and HC5N, with their isomers, are very different in TMC-1 and IRC+10216, namely, N(HC5N)/N(HC4NC) is ~300 and ≥2100, respectively. We discuss the chemistry of the metastable isomers of cyanopolyynes in terms of the most likely formation pathways and by comparing observational abundance ratios between different sources.
Authors: J Cernicharo; N Marcelino; J R Pardo; M Agúndez; B Tercero; P de Vicente; C Cabezas; C Bermúdez Journal: Astron Astrophys Date: 2020-09-23 Impact factor: 5.802
Authors: Brian M Hays; Divita Gupta; Théo Guillaume; Omar Abdelkader Khedaoui; Ilsa R Cooke; Franck Thibault; François Lique; Ian R Sims Journal: Nat Chem Date: 2022-05-05 Impact factor: 24.427