Synthesis, structure and catalytic activity of the first iridium(I) siloxide versus chloride complexes with 1,3-mesitylimidazolin-2-ylidene ligand
Synthesis, structure and catalytic activity of the first iridium(I) siloxide versus chloride complexes with 1,3-mesitylimidazolin-2-ylidene ligand
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DOI：
10.1016/j.jorganchem.2007.11.013
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发表时间：
2008-01-15
影响因子：
2.3
通讯作者：
Marciniec, Bogdan
中科院分区：
文献类型：
--
作者：
Kownacki, Ireneusz;Kubicki, Maciej;Marciniec, Bogdan
合成了第一个含正丙基和N-杂环卡宾配体的铱（I）配合物[Ir（cod）（Mes）（OSiMe（3））]（1）和[Ir（CO）（2）（IMes）（OSiMe（3））]（3），通过光谱和X射线方法解析了它们的结构，并与它们的氯化物类似物进行了比较，即[Ir（Cl）（cod）（IMes）]（2）和[Ir（Cl）（CO）（2）（IMes）]（4）。合成具有叔丁氧基配体的铱（I）络合物的尝试失败了，而是导致了氢氧化铱络合物[Ir（cod）（OH）（IMes）]（5），其X射线结构也已解决。所有配合物（1）-（5）均显示典型的四配位铱配合物的正方平面几何形状。考察了配合物1和2在苯乙酮转移加氢和烯烃加氢反应中的催化活性。(C)2007年由Elsevier B. V.出版。
The first iridium(I) complex containing siloxyl and N-heterocyclic carbene ligand such as [Ir(cod)(Mes)(OSiMe(3))] (1) and [Ir(CO)(2)(IMes)(OSiMe(3))] (3) have been synthesized and their structures solved by spectroscopy and X-ray methods as well as catalytic properties in selected hydrogenation reactions have been presented in comparison to their chloride analogues, i.e. [Ir(Cl)(cod)(IMes)] (2) and [Ir(Cl)(CO)(2)(IMes)] (4). The attempts at synthesis of iridium(l) complex with tert-butoxyl ligand has failed as leading instead to the iridium hydroxide complex [Ir(cod)(OH)(IMes)] (5) whose X-ray structure has also been solved. All complexes (1)-(5) show square planar geometry typical of the four-coordinated iridium complexes. Catalytic activity of complexes 1 and 2 was tested in transfer hydrogenation of acetophenone and hydrogenation of olefins. (C) 2007 Published by Elsevier B.V.