Silica-Grafted Tris(neopentyl)aluminum: A Monomeric Aluminum Solid Co-catalyst for Efficient Nickel-Catalyzed Ethene Dimerization

被引：8

作者：

Moroz, Ilia B. ^{[1
]}

Florian, Pierre ^{[2
]}

Viger-Gravel, Jasmine ^{[3
]}

Gordon, Christopher P. ^{[1
]}

Lesage, Anne ^{[3
]}

Coperet, Christophe ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Dept Chem & Appl Biosci, Vladimir Prelog Weg 1-5, CH-8093 Zurich, Switzerland

[2] Univ Orleans, CEMHTI CNRS UPR3079, 1D Ave Rech Sci, F-45071 Orleans 2, France

[3] UCB Lyon 1, Univ Lyon, Ctr RMN Tres Hauts Champs, CNRS,ENS Lyon, F-69100 Villeurbanne, France

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2020年 / 59卷 / 37期

关键词：

alkylaluminum; Al-27 solid-state NMR spectroscopy; co-catalysts; DFT computations; ethene oligomerization; nickel; OLEFIN POLYMERIZATION; COUPLING-CONSTANTS; NMR; OLIGOMERIZATION; ETHYLENE; SURFACE; COMPLEXES; ACTIVATION; LIGANDS;

D O I：

10.1002/anie.202006285

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A silica-supported monomeric alkylaluminum co-catalyst was prepared via surface organometallic chemistry by contacting tris(neopentyl)aluminum and partially dehydroxylated silica. This system, fully characterized by solid-state(27)Al NMR spectroscopy augmented by computational studies, efficiently activates ((Bu3P)-Bu-n)(2)NiCl(2)towards dimerization of ethene, demonstrating comparable activity to previously reported dimeric diethylaluminum chloride supported on silica. Three types of aluminum surface species have been identified: monografted tetracoordinated Al species as well as two types of bisgrafted Al species-tetra- and pentacoordinated. Of them, only the monografted Al species is proposed to be able to activate the ((Bu3P)-Bu-n)(2)NiCl(2)complex and generate the active cationic species.

引用

页码：16167 / 16172

页数：6

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