Tricarbon
Tricarbon (systematically named 1λ,3λ-propadiene and μ-carbidodicarbon) is an inorganic compound with the chemical formula C
2(μ-C) (also written [C(μ-C)C] or C
3). It is a colourless gas that only persists in dilution or solution as an adduct. It is one of the simplest unsaturated carbenes.