Cyclopropatriene is a hypothetical allotrope of carbon that was once proposed as a candidate for a spectroscopically observed tricarbon species. It is a cyclic cumulene.
References
Cyclopropatriene Wikipedia(Text) CC BY-SA
Cyclopropatriene is a hypothetical allotrope of carbon that was once proposed as a candidate for a spectroscopically observed tricarbon species. It is a cyclic cumulene.