Triafulvalene

Triafulvalene
Names
	Preferred IUPAC name [1,1′-Bi(cyclopropylidene)]-2,2′-diene
	Other names 1,1′-Bi(cycloprop-2-en-1-ylidene)
Identifiers
CAS Number	1608-08-8 ;
3D model (JSmol)	Interactive image;
ChemSpider	35807295;
PubChem CID	86179345;
CompTox Dashboard (EPA)	DTXSID201032864 ;
	InChI InChI=1S/C6H4/c1-2-5(1)6-3-4-6/h1-4H Key: MRCIUZQRSIHAMG-UHFFFAOYSA-N;
	SMILES C=1C(C=1)=C2C=C2;
Properties
Chemical formula	C6H4
Molar mass	76.098 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Triafulvalene or cyclopropenylidenecyclopropene is a fulvalene hydrocarbon with chemical formula C₆H₄, composed of two linked cyclopropene rings. Triafulvalene has never been isolated, since it can decompose via an isodesmic reaction. However, its structure, stability, and spectral properties are well-studied theoretically; the molecule is believed planar.