Organolanthanide-catalyzed dehydrogenative coupling of silanes : mechanistic implications
Organolanthanide-catalyzed dehydrogenative coupling of silanes : mechanistic implications
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DOI：
10.1021/om00054a008
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发表时间：
1991-08
期刊：
影响因子：
2.8
通讯作者：
C. Forsyth;S. Nolan;T. Marks
中科院分区：
文献类型：
--
作者：
C. Forsyth;S. Nolan;T. Marks
Cp'2LnR（Cp' = eta-5-Me 5C 5; Ln = La、Nd、Sm、Y、Lu; R = Nd; R = CH（SiMe 3）2）、Cp'2Sm和Cp'2Sm（THF）2型有机镧系元素络合物催化PhSiH 3的快速分解低聚。动力学和机械论的论点排除了金属中心的氧化还原过程在催化循环中的重要性，而是支持“四中心”“异裂”键断裂/键形成序列。
Organolanthanide complexes of the type Cp'2LnR (Cp' = eta-5-Me5C5; Ln = La, Nd, Sm, Y, Lu; R = Nd; R = CH(SiMe3)2), Cp'2Sm, and Cp'2Sm(THF)2 catalyze the rapid dehydrogenative oligomerization of PhSiH3. Kinetic and mechanistic arguments exclude the importance of metal-centered redox processes in the catalytic cycle and support instead ''four-center'' ''heterolytic'' bond-scission/bond-forming sequences.