Gold(III)-arene complexes by insertion of olefins into gold-aryl bonds
The synthesis and characterization of the first gold(III)–arene complexes is described. Well–defined (P,C)-cyclometallated gold(III)–aryl complexes have been prepared and characterized by NMR spectroscopy. They swiftly and cleanly react with norbornene and ethylene to give cationic gold(III)–alkyl complexes in which the remote phenyl ring is η2–coordinated to gold. The interaction between the aromatic ring and the gold(III) center has been thoroughly analyzed by NMR spectroscopy, X-Ray diffraction and DFT calculations. The π–arene coordination is found to significantly influence the stability and reactivity of low coordinate gold(III) alkyl species.