Vinylcyanoacetylene (C2H3C3N or H2C=CH–C≡C–C≡N) was
Lee and co-workers, as reported in
2021. The observations were made with the
and relied in part on experimental data from
Thorwirth and co-workers. The detection has not yet been
confirmed with subsequent observations.
Vinylcyanoacetylene is more properly named
4-penten-2-ynenitrile because there are five (penta)
carbon atoms, including a nitrile (–C≡N) group. There is a triple bond between carbon atoms 2 and 3
(the "2-yne" part of the name) and a double bond between carbon atoms 4 and 5 [the
"4-penten(e)" part of the name].