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Published on: June 20, 2014
Oxidation-promoted activation of a ferrocene C-H bond by a rhodium complex
Agnès Labande1, Nathalie Debono, Alix Sournia-Saquet
1CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099, Toulouse, France. agnes.labande@lcc-toulouse.fr
Abstract:
The oxidation of a rhodium(I) complex containing a ferrocene-based heterodifunctional phosphine N-heterocyclic carbene (NHC) ligand produces a stable, planar chiral rhodium(III) complex with an unexpected C-H activation on ferrocene. The oxidation of rhodium(I) to rhodium(III) may be accomplished by initial oxidation of ferrocene to ferrocenium and subsequent electron transfer from rhodium to ferrocenium. Preliminary catalytic tests showed that the rhodium(III) complex is active for the Grignard-type arylation of 4-nitrobenzaldehyde via C-H activation of 2-phenylpyridine.
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