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首页> 外文期刊>Organometallics >Molybdenum(II) Complexes Containing Cyclopentadienyl-Functionalized N-Heterocyclic Carbenes: Synthesis, Structure, and Application in Olefin Epoxidation
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Molybdenum(II) Complexes Containing Cyclopentadienyl-Functionalized N-Heterocyclic Carbenes: Synthesis, Structure, and Application in Olefin Epoxidation

机译:含环戊二烯基官能化的N-杂环卡宾的钼(II)配合物:合成,结构及其在烯烃环氧化中的应用

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摘要

A set of four different (Cp-x-NHC)Mo(CO)(2)I (CPx = CP, CP*, and Cp-BZ,Cp- NHC= N-heterocyclic carbenes) complexes has been prepared from the one-pot reaction of [MoCl(eta(3)-C-3-H-5)(CO)(2)-(NCMe)(2)] and the corresponding lithium NHC-cyclopentadienides. The modification of the Cp-x-NHC affords a smooth Way to tune the stereoelectronic properties of these new molybdenum complexes. These compounds are air stable both in solution and in the solid state. Preliminary studies on the catalytic expoxidation wich cis-cyclooctene and TBHP as oxidant show that the activity of the catalysts clearly depends on the nature of Cp-x-NHC ligand. The reaction proceeds smoothly toward epoxide; no diols or any other byproduct was detected along the reaction course.
机译:已从以下一种化合物制备了四种不同的(Cp-x-NHC)Mo(CO)(2)I(CPx = CP,CP *和Cp-BZ,Cp- NHC = N-杂环卡宾)配合物[MoCl(eta(3)-C-3-H-5)(CO)(2)-(NCMe)(2)的锅反应和相应的NHC-环戊二烯酸锂。 Cp-x-NHC的修饰提供了一种平滑的方式来调节这些新的钼配合物的立体电子性质。这些化合物在溶液和固态下都是空气稳定的。对以顺式环辛烯和TBHP为氧化剂的催化氧化的初步研究表明,催化剂的活性显然取决于Cp-x-NHC配体的性质。反应平稳地朝着环氧化物的方向进行。在反应过程中未检测到二醇或任何其他副产物。

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