involvement in the rearrangements is discussed. The kinetics of the isomerization reaction of the cyclometalated iridium(V) complex (5) to the iridium silylene [Cp*(PMe3)Ir(SiMes2)(H)][OTf] (6) were examined using NMR spectroscopic techniques. The primary kinetic isotope effect (Si−H vs Si−D bond) for this process was determined to be 1.4 ± 0.1, implying a rate-limiting hydride migration from silicon to iridium
硅-氢活化的由CP上的机制*(PME 3)IR(Me)的光学传递函数(CP * =η 5 -C 5我5,光学传递函数= OSO 2 CF 3 ; 1),将得到的复合物silyliridium的重排进行了研究。对于具有多种取代基的
硅烷,已经研究了该反应的范围。类型[CP *(PMe 3)Ir(SiR 2)(H)] [X](X = OTf,R = Mes,6 ; X = B(C 6 F 5)4,R = Ph,16)已被隔离,并讨论了它们参与重排的可能性。使用核磁共振波谱技术研究了环
金属化
铱(V)配合物(5)与
铱甲
硅烷基[CP *(PMe 3)Ir(SiMes 2)(H)] [OTf](6)的异构化反应动力学。确定该过程的主要动力学同位素效应(Si-H与Si-D键)为1.4±0.1,这意味着从
硅到
铱的限速
氢化物迁移。此异构化的激活参数也已测得的:Δ ħ ⧧ = 23±2千卡/摩尔和Δ小号⧧= 0