Catalytic Hydrogenation Using Abnormal N-Heterocyclic Carbene Palladium Complexes: Catalytic Scope and Mechanistic Insights

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Title: Catalytic Hydrogenation Using Abnormal N-Heterocyclic Carbene Palladium Complexes: Catalytic Scope and Mechanistic Insights
Authors: Heckenroth, Marion
Khlebnikov, Vsevolod
Neels, Antonia
Schurtenberger, Peter
Albrech, Martin
Permanent link: http://hdl.handle.net/10197/6663
Date: 10-Jan-2011
Abstract: Palladium complexes containing abnormally bound C4-bound dicarbene ligands have been exploited for catalytic alkene hydrogenation. Comparison to normally C2-bound homologues indicates that the carbene bonding mode critically influences the catalytic activity. Good catalytic performance in the hydrogenation of cis-disubstituted olefins and non-isomerizable terminal olefins under mild conditions (RT, 0.1 MPa H2) only occurs when the carbene is abnormally bound to the palladium center. Detailed mechanistic investigations using dynamic light scattering in connection with time-dependent analysis of conversions, and also performance of substoichiometric catalytic experiments provide evidence that the catalysis is heterogeneous and that the abnormally bound carbene ligand has the role of an activator.
Type of material: Journal Article
Publisher: Wiley
Copyright (published version): 2011 Wiley
Keywords: C-C;Abnormal bonding;Carbene ligands;Hydrogenation;Mechanisms;Palladium;Oxidative addition;Homogeneous hydrogenation;Asymmetric hydrogenation;Heterogeneous catalysis;Alkane dehydrogenation;Activation reactions;Colloidal palladium;Iridium complexes;Reductive elimination
DOI: 10.1002/cctc.201000270
Language: en
Status of Item: Peer reviewed
Appears in Collections:Chemistry Research Collection

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