1 with NaOtBu in dichloromethane under carbon monoxide (1 atm) gives a carbonyl-bridged IrII–IrII complex, [(Cp∗Ir)2(μ-dmpm)(μ-H)(μ-CO)][OTf] (8-OTf). These results strongly suggest that the active species in C–H and H–H bond activation starting with 1 and 2 would be unsaturated 32e− diiridium species. The structures of 3, 5a, 6, 7, and 8-BPh4 have been determined by X-ray diffraction methods.
[(Cp ∗ Ir)2(μ-dmpm)(μ-H)2 ] [OTf] 2(1)与NaO t Bu在室温下在芳族溶剂中的反应得到[(Cp ∗ Ir)(H)(μ -dmpm)(μ-H)(Cp ∗ Ir)(Ar)] [OTf] [Ar = Ph(3),p -Tol(4a),m -Tol(4b),2-
呋喃基(5a),3 -
呋喃基(5b)]通过分子间芳香族C – H活化。用弱碱(Et)处理[(Cp ∗ Ir)2(μ-dppm)(μ-H)2 ] [OTf] 2(2)2 NH)导致分子内C–H活化dppm
配体中的苯基,得到[(Cp ∗ Ir)(H)μ-PPh(C 6 H 4)CH 2 PPh 2 }(μ-H)( Cp * Ir)] [OTf](6)。1在H 2(1 atm)下与
四氢呋喃中的NaO t Bu反应,导致H – H键活化,得到[(Cp ∗ Ir)(H)} 2(μ-dmpm)(μ-H)] [O