activation. The molecular structures of complexes 3a, 3b and 5a were investigated using single crystal XRD. The catalytic experiments showed that the nickel complexes could catalyze the hydrosilylation of unsaturated compounds like aldehydes and ketones, and complex 3b was found to exhibit the best catalytic activity at 30 °C. Using NaBHEt3 as an additive, the catalytic activity of 3b was greatly improved
八个[CNN]钳形
镍NHC
氯化物,[ R C卡宾N酰胺基R′2 N胺–Ni–Cl] (R/R′2 =
喹啉基/ n Bu ( 3a )、
喹啉基/Me ( 3b )、
喹啉基/PhCH 2 ( 3c )、(CH 2 ) 4 / n Bu ( 5a )、(CH 2 ) 4 / i Pr ( 5b )、Me 2 / n Bu ( 5c )、Me 2 / i Pr ( 5d ) 和 Me 2/PhCH 2 ( 5e )) 是通过相关不对称 [CNN] NHC 预
配体与 Ni(
DME)Cl 2 通过N-H 键活化反应制备的。使用单晶X射线衍射研究了配合物3a、3b和5a的分子结构。催化实验表明,
镍配合物可以催化醛、酮等不饱和化合物的
硅氢加成反应,其中配合物3b在30℃时表现出最佳的催化活性。以NaBHEt 3作为添加剂,3b的催化活性得到了很大的改善。此外,发现3b和NaBHEt 3与
硅烷预反应0.5小时后,在30℃下1