trans-1,1'-Bis(indenylidene)

The title compound, (C₉H₆)₂, was obtained by the coupling of the carbene, C₉H₆:, derived from 1-diazoindene, C₉H₆N₂, in the presence of [Ru₃(CO)₁₂]. The molecule is centrosymmetric and completely planar. The six-membered rings have aromatic character and are connected by an extended π-electron system.

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