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Acene‐based materials have promising applications for organic electronics but the major constrain comes from their poor stability. Herein a new strategy to stabilize reactive acenes, by fusion of an anti‐aromatic pentalene unit onto the zigzag edges of two acene units to form a Z‐shaped acene dimer, is introduced. The Z‐shaped acene dimers are extremely stable and show a small energy gap resulting...
Quinoidal thia‐acene analogues, as the respective isoelectronic structures of pentacene and nonacene, were synthesized and an unusual 1,2‐sulfur migration was observed during the Friedel–Crafts alkylation reaction. The analogues display a closed‐shell quinoidal structure in the ground state with a distinctive dipolar character. In contrast to their acene isoelectronic structures, both compounds are...
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