2,5-DIAZACYCLOPENTADIENYUDENE: A STANDARD CARBENE OR A HIGHLY REACTIVE DIRADICAL ?
- 5 December 1980
- journal article
- Published by Oxford University Press (OUP) in Chemistry Letters
- Vol. 9 (12) , 1489-1492
- https://doi.org/10.1246/cl.1980.1489
Abstract
2,5-Diazacyclopentadienylidene (2H-imidazolylidene), generated either by photolysis or thermolysis from 2-diazo-2H-imidazole, reacts with benzene derivatives to give mainly a mixture of o-, m-, and p-substituted 2-phenylimidazoles. The carbene shows a strong diradical character, in sharp contrast with the well-known behavior of cyclopentadienylidene.Keywords
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