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Published August 25, 2004 | Submitted + Supplemental Material
Journal Article Open

A Stable Four-Membered N-Heterocyclic Carbene


The synthesis of the first four-membered N-heterocyclic carbene is described. Depending on the substituents on the nitrogen atoms, it is possible to characterize at room temperature the carbene dimer or the free carbene. Crystallographic analyses are provided for these carbene species.

Additional Information

© 2004 American Chemical Society. Received 13 April 2004. Published online 3 August 2004. Published in print 1 August 2004. We thank Lawrence M. Henling and Michael W. Day for X-ray crystallography studies. E.D.-A. is grateful to the Ministère des Affaires Etrangères (France) for a Lavoisier postdoctoral fellowship. This work was supported by the National Science Foundation.

Attached Files

Submitted - ja047892dsi20040413_013321.cif

Supplemental Material - ja047892dsi20040413_013058.cif

Supplemental Material - ja047892dsi20040604_055148.pdf

Supplemental Material - ja047892dsi20040604_055348.cif


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August 19, 2023
October 25, 2023