Dihydroimidazol-2-ylidene
Introduction '''Dihydroimidazol-2-ylidene''' is a hypothetical organic compound with formula C3H6N2.It would be a heterocyclic compound, formally derived from imidazolidine with two hydrogen atoms removed from carbon number 2, leaving two vacant chemical bonds — which makes it a carbene.Although carbenes in general are extremely short-lived, some derivatives of this compound are surprisingly stable, and form an important class of the persistent carbenes. They include the first stable carbenes postulated (but not isolated) by Hans-Werner Wanzlick around 1960.Wanzlick's mechanism for the reaction of dihydroimidazol-2-ylidene with electrophiles1,3-Dimesityl-imidazol-4,5-dihydro-2-ylidene, a stable carbene without delocalization around the ring containing the carbenic carbon( external viewer)They also include an example of the (saturated) imidazolin-2-ylidene (carbene) reported by A.J. Arduengo in 1995.
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