"Butterfly Wings" Stabilize Heptacene.
Matthias MüllerElias C RüdigerSilke KoserOlena TverskoyFrank RomingerFelix HinkelJan FreudenbergUwe H F BunzPublished in: Chemistry (Weinheim an der Bergstrasse, Germany) (2018)
The synthesis of bisalkynylated derivatives of tetrabenzo[a,c,p,r]heptacene and tetrabenzo[a,c,l,n]pentacene via two-/fourfold Stille reactions involving a 9-stannafluorene and suitable tetrabromoacenes is reported. These triphenylene-"winged" heptacenes are surprisingly stable and maintain a significant portion of the electronic properties of heptacenes.
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