Reactivity of Phosphane–Imidazolium Salts Towards [Ir(COD)Cl] 2 : Preparation of New Hydridoiridium(III) Complexes Bearing Abnormal Carbenes

Joffrey Wolf (1) , Agnès Labande (1) , Jean-Claude Daran (1) , Rinaldo Poli (1)

1 LCC - Laboratoire de chimie de coordination

The unusual reactivity of chelating phosphane–imidazolium salts MesImEtPPh2+Br–, DIPP‐ImEtPPh2+Br–, and MesImEtPPh2+BF4– towards the low‐oxidation‐state iridium complex [Ir(COD)(μ‐Cl)]2 was studied. In the absence of a base, the C–H insertion at the C5 position of the imidazolium ring was the only reaction that occurred, with no normal NHC observed, leading to hydridoiridium(III) complexes. This reactivity was independent of the nature of the imidazolium counteranion and of the substitution pattern of the aryl group.

Mots clés: Carbenes; Phosphane ligands; Iridium; Hydrides; C–H activation

Domaines: Chimie de coordination

Joffrey Wolf, Agnès Labande, Jean-Claude Daran, Rinaldo Poli. Reactivity of Phosphane–Imidazolium Salts Towards [Ir(COD)Cl] 2 : Preparation of New Hydridoiridium(III) Complexes Bearing Abnormal Carbenes. European Journal of Inorganic Chemistry, 2008, 2008 (19), pp.3024-3030. ⟨10.1002/ejic.200800270⟩. ⟨hal-03192568⟩