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First experimental evidence of 3D aromaticity in stacked antiaromatic compounds

Researchers found that antiaromatic planar norcorrole molecules can form close face-to-face interactions to give structures with increased aromaticity. This behavior is quite different from that of typical aromatic materials, which adopt offset interactions to minimize electron repulsion. The results agree with previous theoretical studies proposing that the aromaticity of antiaromatic materials can be increased through suitable interactions to produce materials with interesting electronic structures.

(via WSJ)