Triafulvalene or cyclopropenylidenecyclopropene is a fulvalene hydrocarbon with chemical formula C6H4, composed of two linked cyclopropene rings.

Triafulvalene has never been isolated,[1] since it can decompose via an isodesmic reaction.

[2] However, its structure,[3] stability, and spectral properties are well-studied theoretically;[citation needed] the molecule is believed planar.

[3] This article about a hydrocarbon is a stub.

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