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The reaction of [26]hexaphyrin with triethylamine in the presence of BF3⋅OEt2 and O2 furnished a diastereomeric mixture of a diethylamine‐bearing [28]hexaphyrin as a rare example of a Möbius aromatic metal‐free expanded porphyrin. The Möbius aromaticity of these molecules is large, as indicated by their large diatropic ring currents, which are even preserved at 100 °C, owing to their internally multiply...
Aromatizität mit Dreh: Die Umkehr von Möbius‐Aromatizität wurde in Mono‐Phosphorkomplexen von [28]Hexaphyrinen und Bis‐Phosphorkomplexen von [30]Hexaphyrinen durch eine Änderung der Anzahl der π‐Elektronen zwischen [4n+2]π und [4n]π nachgewiesen. Bis‐Phosphor[30]hexaphyrine (siehe Bild) sind die ersten strukturell charakterisierten Möbius‐antiaromatischen Systeme, die formtreu, neutral und stabil...
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