A study of the C${}_3$H${}_2$ isomers and isotopologues: first interstellar detection of HDCCC

S. Spezzano, H. Gupta, S. Brünken +8

The partially deuterated linear isomer HDCCC of the ubiquitous cyclic carbene ($c$-C${}_3$H${}_2$) was observed in the starless cores TMC-1C and L1544 at 96.9 GHz, and a confirming lin…