The structural element of a protonated imidazolium system was realized for the first time in the synthesis of 1 from 2,2'-bipyridine and a novel methylenating agent. Reversible deprotonations proceed via 2 to lead to carbene 3, a formal 1:1 complex between singlet carbon and 2,2'-bipyridine which is stable in solution and can be trapped. For 1 and 2, unusual hybridizations of the bridging C atom were found experimentally.

Das Strukturelement eines protonierten Imidazoliumsystems wurde mit der Synthese von 1 aus 2,2′‐Bipyridin und einem neuartigen Methylenierungsmittel erstmals realisiert. Reversible Deprotonierungen führen über 2 zum in Lösung stabilen und abfangbaren Carben 3, einem formalen 1:1‐Komplex aus Singulett‐Kohlenstoff und 2,2′‐Bipyridin. Für 1 und 2 wurden experimentell ungewöhnliche Hybridisierungen des Brücken‐C‐Atoms gefunden.

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