hydroxy-bridged dimer [(COD)Ir(μ2-OH)]2 (COD = 1,5-cyclooctadiene) cleanly cleaves C–H bonds in indene and cyclopentadiene to produce (COD)Ir(η3-indenyl) and (COD)Ir(η5-C5H5), respectively. The kinetics of the formation of (COD)Ir(η3-indenyl) are consistent with a mechanism that involves coordination of indene to [(COD)Ir(μ2-OH)]2 followed by rate-determining C–H activation from the iridium dimer–indene
羟基桥联二聚体[(COD)的Ir(μ 2 -OH)] 2在
茚并
环戊二烯(COD =
1,5-环辛二烯)干净地切割C-H键,以产生(COD)的Ir(η 3 -
茚基)和(η(COD)IR 5 -C 5 H ^ 5),分别。(COD)的Ir(η的形成的动力学3 -
茚基)是具有涉及到[(COD)的Ir(μ
茚协调的机制一致2 -OH)] 2然后确定
铱二聚体-
茚单元的C–H活化速率。Ir和Rh羟基二聚体的过渡态分析表明,C–H活化是通过M–OH单元使
茚直接去质子化而不是逐步的氧化加成/还原消除机理进行的。的晶体结构[(COD)IR] 5(μ 4 -O)(μ 3 -O)(μ 2 -OH),[(COD)的Ir(μ的脱
水产物2 -OH)] 2,呈现了。