Synthesis, structure, and reductive elimination chemistry of three-coordinate arylpalladium amido complexes
Synthesis, structure, and reductive elimination chemistry of three-coordinate arylpalladium amido complexes
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DOI：
10.1021/ja0315107
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发表时间：
2004-05-05
影响因子：
15
通讯作者：
Hartwig, JF
中科院分区：
文献类型：
--
作者：
Yamashita, M;Hartwig, JF
分离了4个具有单受阻膦的三配位芳基钯酰胺配合物，并对其结构进行了表征。每个都有一个t形的几何形状。其中一些配合物具有真正的三坐标结构，缺乏配体C−H键的任何额外配位。所有的三坐标配合物都经过还原消除形成相应的三芳胺。三配位化合物的反应速率比较表明，五苯基二茂铁二叔丁基膦配合物的消除速度最快。三坐标配合物与四坐标配合物的反应速率比较表明，三坐标配合物的反应速率要快得多。
Four three-coordinate arylpalladium amido complexes with a single hindered phosphine were isolated and structurally characterized. Each possessed a T-shaped geometry. Several of these complexes possessed true three-coordinate structures that lacked any additional coordination by ligand C−H bonds. All of the three-coordinate complexes underwent reductive elimination to form the corresponding triarylamine. A comparison of the rate of reaction of the three-coordinate compounds demonstrated that the rate of elimination from the pentaphenylferrocenyl di-tert-butylphosphine complex were the fastest. A comparison of the rates of reactions between three-coordinate and four-coordinate complexes showed that the rates were much faster from the three-coordinate complexes.