Bidentate NHC-Cobalt Catalysts for the Hydrogenation of Hindered Alkenes,Organometallics

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Bidentate NHC-Cobalt Catalysts for the Hydrogenation of Hindered Alkenes
Organometallics ( IF 2.5 ) Pub Date : 2020-09-01 , DOI: 10.1021/acs.organomet.0c00498
Zeyuan Wei ₁ , Yujie Wang ₁ , Yibiao Li ₂ , Raffaella Ferraccioli ₃ , Qiang Liu ₁

Affiliation

Herein, we report a series of easily accessible bidentate N-heterocyclic carbene (NHC) cobalt catalysts, which enable the hydrogenation of hindered alkenes under mild conditions. The four-coordinated bidentate NHC-Co(II) complexes were characterized by X-ray diffraction, elemental analysis, ESI-HRMS, and magnetic moment measurements, revealing a distorted-tetrahedral geometry and a high-spin configuration of the metal center. The activity of the in situ formed catalytic system, which was obtained from easily available NHC precursors, CoCl₂, and NaHBEt₃, was identical with those of well-defined NHC-cobalt catalysts. This highlights the potential utility of this reaction system.

中文翻译：

用于受阻烯烃加氢的二齿NHC-钴催化剂

在此，我们报告了一系列易于获得的双齿N-杂环卡宾（NHC）钴催化剂，该催化剂能够在温和条件下氢化受阻烯烃。通过X射线衍射，元素分析，ESI-HRMS和磁矩测量对四配位的双齿NHC-Co（II）配合物进行表征，揭示了扭曲的四面体几何形状和金属中心的高自旋构型。从容易获得的NHC前体CoCl ₂和NaHBEt ₃获得的原位形成的催化体系的活性与明确定义的NHC-钴催化剂的活性相同。这突出了该反应系统的潜在用途。

更新日期：2020-09-14

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