Photochemical Reactions of [(η
<sup>5</sup>
‐C
<sub>5</sub>
R
<sub>5</sub>
)Re(CO)
<sub>3</sub>
] (R = Me or H) with Aryl Halides in Benzene: Stoichiometric Formation of Biphenyl
作者:Bolin Zhu、Xinwei Huang、Xiaoting Hao
DOI:10.1002/ejic.201402793
日期:2014.12
other one comes from solvent benzene. Photolysis of [CpRe(CO)3] (Cp = η5-C5H5) with aryl halide in benzene similarly generates biphenyl, the corresponding rhenium hydride halide complex. Furthermore, the reaction also affords small amounts of rhenium dihydride complex [CpRe(CO)2H2]. Plausible mechanisms for the formation of the different types of products are proposed that involve intermolecular C–X
[Cp*Re(CO)3] (Cp* = η5-C5Me5) 与溴苯或氯苯在苯中的光解产生联苯和相应的氢化铼卤化物配合物反式-[Cp*Re(CO)2H(X)],其进一步转化为二卤化物配合物顺式/反式-[Cp*Re(CO)2X2] (X = Br, Cl)。其他实验,包括同位素标记实验,表明联苯中的一个苯环来自芳基卤,另一个来自溶剂苯。[CpRe(CO)3] (Cp = η5-C5H5) 与苯中的芳基卤化物光解类似地生成联苯,即相应的氢化铼卤化物络合物。此外,该反应还提供了少量的二氢化铼络合物 [CpRe(CO)2H2]。提出了形成不同类型产物的合理机制,涉及分子间 C-X 和 C-H 活化。