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向Cp*(PMe3)Rh(Me)(CH2Cl2)+BAr'4- (1)中添加1.0当量的Ph3SiH导致甲烷释放并定量生成Cp*(PMe3)Rh(SiPh3)(CH2Cl2)+BAr'4- (2)。随后向2中添加1.0当量的MeCN立即替代二氯甲烷,形成η1-腈加合物Cp*(PMe3)Rh(SiPh3)(NCMe)+BAr'4- (3)。在室温下放置一夜后,复合物3定量转化为另一种产物,该产物被表征为C-C活化产物Cp*(PMe3)Rh(Me)(CNSiPh3)+BAr'4- (5)。向2中添加其他腈底物(R-CN, R = Ph, (4-CF3)Ph, (4-MeO)Ph, iPr, tBu)也导致R-CN键的C-C活化,生成Cp*(PMe3)Rh(R)(CNSiPh3)+BAr'4-。还提供了η2-亚氨基酰基中间复合物Cp*(PMe3)Rh(η2-C(R)=N(SiPh3)+BAr'4-的证据。
Taw等人(Thu,)研究了这个问题。
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