Wingtip substituents tailor the catalytic activity of ruthenium triazolylidene complexes in base-free alcohol oxidation

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Title: Wingtip substituents tailor the catalytic activity of ruthenium triazolylidene complexes in base-free alcohol oxidation
Authors: Canseco-Gonzalez, Daniel
Albrecht, Martin
Permanent link: http://hdl.handle.net/10197/6597
Date: 28-May-2013
Abstract: A series of RuII (η6-arene) complexes with 1,2,3-triazolylidene ligands comprising different aryl and alkyl wingtip groups have been prepared and characterized by NMR spectroscopy, microanalysis, and in one case by X-ray diffraction. All complexes are active catalyst precursors for the oxidation of alcohols to the corresponding aldehydes/ketones without the need of an oxidant or base as additive. The wingtip groups have a direct impact on the catalytic activity, alkyl wingtips providing the most active species while aryl wingtip groups induce lower activity. An N-bound phenyl group was the most inhibiting wingtip group due to cyclometalation. Arene dissociation was observed as a potential catalyst deactivation pathway.
Funding Details: European Research Council
Science Foundation Ireland
Type of material: Journal Article
Publisher: Royal Society of Chemistry
Copyright (published version): 2013 The Royal Society of Chemistry
Keywords: N-heterocyclic carbene;H bond activation;Asymmetric transfer hydrogenation;Selective oxidation;Secondary alcohols;Aerobic oxidation;Ligands synthesis;Molecular-oxygen;Dehydrogenation;Reactivity
DOI: 10.1039/c3dt32939a
Language: en
Status of Item: Peer reviewed
Appears in Collections:Chemistry Research Collection

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