Stoichiometric and Catalytic Reactions of Thermally Stable Nickel(0) NHC Complexes

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• 作者：Jianguo Wu ; John W. Faller ; Nilay Hazari ; Timothy J. Schmeier
• 刊名：Organometallics
• 出版年：2012
• 出版时间：February 13, 2012
• 年：2012
• 卷：31
• 期：3
• 页码：806-809
• 全文大小：258K
• 年卷期：v.31,no.3(February 13, 2012)
• ISSN：1520-6041

文摘

Although there are many organic reactions that are catalyzed by either Ni⁰ or Pd⁰ complexes, in comparison with the case for Pd⁰ there has been significantly less work studying coordinatively unsaturated Ni⁰ complexes. Here, we develop a simple synthetic route for preparing a number of thermally stable NHC-supported Ni⁰ hexadiene complexes in good yield. We examine the stoichiometric reactivity of one of these species and demonstrate that the coordinated hexadiene moiety is labile and can be replaced with a variety of different ligands, including CO, phosphines, isonitriles, and olefins. In addition, we show that the Ni⁰ hexadiene complexes are relatively rare examples of homogeneous first-row transition-metal catalysts for the hydrogenation of olefins.