Neutral Ligands with Exceptional Donor Ability for Palladium-Catalyzed Alkene Hydrogenation

With four site: Catalytic olefin hydrogenation is observed with palladium complexes when the N‐heterocyclic carbene ligand is changed from the normal C2‐ to the unusual C4‐bonding mode (see scheme). In a cis coordinating framework, the electron density at the metal center is substantially increased...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2007-01, Vol.46 (33), p.6293-6296
Main Authors: Heckenroth, Marion, Kluser, Evelyne, Neels, Antonia, Albrecht, Martin
Format: Article
Language:English
Subjects:
bonding modes
cyclometalation
hydrogenation
N-heterocyclic carbenes
palladium
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Summary:With four site: Catalytic olefin hydrogenation is observed with palladium complexes when the N‐heterocyclic carbene ligand is changed from the normal C2‐ to the unusual C4‐bonding mode (see scheme). In a cis coordinating framework, the electron density at the metal center is substantially increased as a result of the exceptionally strong donor ability of C4‐bound carbenes.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.200702199