Robust Olefin Metathesis Catalyst Bearing a Tridentate Hemilabile NHC Ligand,Organometallics

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Robust Olefin Metathesis Catalyst Bearing a Tridentate Hemilabile NHC Ligand
Organometallics ( IF 2.5 ) Pub Date : 2020-02-14 , DOI: 10.1021/acs.organomet.9b00804
Joseph S Yoon ₁ , Nicolas Cena ₁ , Yann Schrodi ₁

Affiliation

An olefin metathesis catalyst bearing a tridentate hemilabile N-heterocyclic carbene (NHC) ligand was synthesized and characterized. The solid-state crystal structure reveals coordination from all three donation sites of the NHC ligand, giving rise to a stable 18-electron complex. Catalytic activity in three standard metathesis reactions was demonstrated, revealing our catalyst to be particularly long lived and highly selective in the self-metathesis of 1-decene. Although the catalyst in this work initiates more slowly than its second-generation counterparts, it was shown to have high thermal stability, yielding peak performances at higher temperatures. The unique ligand framework of this catalyst may serve as a template for the synthesis of analogous catalysts with improved efficiencies.

中文翻译：

具有三齿半可比 NHC 配体的稳健烯烃复分解催化剂

合成并表征了一种带有三齿半可配体 N-杂环卡宾 (NHC) 配体的烯烃复分解催化剂。固态晶体结构揭示了 NHC 配体的所有三个供体位点的配位，从而产生了稳定的 18 电子复合物。证明了三种标准复分解反应中的催化活性，表明我们的催化剂在 1-癸烯的自复分解中具有特别长的寿命和高度选择性。尽管这项工作中的催化剂比其第二代催化剂启动得更慢，但它被证明具有高热稳定性，在较高温度下产生峰值性能。该催化剂独特的配体框架可以作为模板用于合成具有更高效率的类似催化剂。

更新日期：2020-02-17

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