Oxidation-promoted activation of a ferrocene C–H bond by a rhodium complex

Agnès Labande (1, 2) , Nathalie Debono (1, 2) , Alix Sournia-Saquet (1, 2) , Jean-Claude Daran (1, 2) , Rinaldo Poli (1, 3, 2)

1 LCC - Laboratoire de chimie de coordination
2 UT3 - Université Toulouse III - Paul Sabatier
3 IUF - Institut universitaire de France

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.

Domaines: Chimie de coordination

Agnès Labande, Nathalie Debono, Alix Sournia-Saquet, Jean-Claude Daran, Rinaldo Poli. Oxidation-promoted activation of a ferrocene C–H bond by a rhodium complex. Dalton Transactions, 2013, 42 (18), pp.6531-6537. ⟨10.1039/C3DT50240F⟩. ⟨hal-02908070⟩