aromatic−cyanide bond activation. Competitive activations of C−Si and C−C bonds were observed for 2-silylacetonitriles. The yields of Rh(tmp) alkyls were affected by bond energy and steric hindrance of the nitriles. Kinetic studies for the carbon−carbon bond activation (CCA) of tBuCN at 130 °C revealed the rate law: rate = k‘K1[Rh(tmp)]m[Ph3P]n + k3K2(K1[Ph3P])/(1 + K1[Ph3P])[Rh(tmp)][tBuCN]. The CCA is proposed
Rh(tmp)使用Ph 3 P作为最优化的启动子
配体在130°C活化了一系列α-烷基
乙腈,2-甲
硅烷基
乙腈和2-烷基
苯甲腈的C(sp 3)-C(sp 3)键。选择性的脂肪族-脂肪族碳-碳键活化(CCA)发生在没有芳族-脂肪族或芳族-
氰化物键活化的α-烷基
乙腈和2-烷基
苄腈上。对于2-甲
硅烷基
乙腈,观察到了竞争性的C-Si和C-C键活化。Rh(tmp)烷基的产率受键能和腈的位阻的影响。为碳-碳键的激活(CCA)的动力学研究吨BuCN在130℃下显示速率定律:速率= ķ ' ķ 1[Rh(tmp)]米[Ph 3 P] n+ k 3 K 2(K 1 [Ph 3 P])/(1 + K 1 [Ph 3 P])[Rh(tmp)] [ t BuCN]。建议在过渡状态下,CCA发生在与Rh(tmp)配比的t BuCN处,配比为1:1。