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Published January 31, 2005 | Supplemental Material
Journal Article Open

A Ruthenium Olefin Metathesis Catalyst with a Four-Membered N-Heterocyclic Carbene Ligand


The first ruthenium olefin metathesis catalyst bearing a four-membered N-heterocyclic carbene (5) was synthesized and characterized by NMR spectroscopy and X-ray crystallography. The synthesis of a (carbene)carbonylrhodium complex (6) was also reported, allowing the study of the electronic properties of this new carbene ligand. The complex 5 was screened toward different olefin metathesis reactions, and it showed a slow reactivity.

Additional Information

© 2005 American Chemical Society. Received 22 November 2004. Published online 31 December 2004. Published in print 1 January 2005. We thank Lawrence M. Henling, Michael W. Day, and the ACS PRF summer class for X-ray crystallography studies. We acknowledge also Materia for providing chemicals and Dr. Christiane Meyer-Marti for the GC conditions on the CM reaction. E.D.-A. is grateful to the Ministère des Affaires Etrangères of France for a Lavoisier postdoctoral fellowship. This work was also supported by the National Science Foundation.

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