Lewis Acid Enhanced Ethene Dimerization and Alkene Isomerization鈥擡SI-MS Identification of the Catalytically Active Pyridyldimethoxybenzimidazole Nickel(II) Hydride Species

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• 作者：Manuel A. Escobar ; Oleksandra S. Trofymchuk ; Barbara E. Rodriguez ; Claudia Lopez-Lira ; Ricardo Tapia ; Constantin Daniliuc ; Heinz Berke ; Fabiane M. Nachtigall ; Leonardo S. Santos ; Rene S. Rojas
• 刊名：ACS Catalysis
• 出版年：2015
• 出版时间：December 4, 2015
• 年：2015
• 卷：5
• 期：12
• 页码：7338-7342
• 全文大小：350K
• ISSN：2155-5435

文摘

A cationic methallyl 2-pyridine-4,7-dimethoxybenzimidazole (L₁) nickel precatalyst is highly selective in ethene dimerizations to 1-butene. The same catalyst isomerizes 1-butene and 1-octene to internal olefins. Co-catalytic additives of B(C₆F₅)₃ or BF₃路OEt₂ coordinate to the catalyst and increase the reaction rates of ethene dimerization. ESI-MS was applied identifying a [L₁NiH]⁺ cation as the catalytically active species.