Synthesis and characterization of a homogeneous and silica supported homoleptic cationic tungsten(VI) methyl complex: application in olefin metathesis

被引：8

作者：

Dey, Raju ^{[1
]}

Samantaray, Manoja K. ^{[1
]}

Poater, Albert ^{[1
,2
,3
]}

Hamieh, Ali ^{[1
]}

Kavitake, Santosh ^{[1
]}

Abou-Hamad, Edy ^{[1
]}

Callens, Emmanuel ^{[1
]}

Emwas, Abdul-Hamid ^{[4
]}

Cavallo, Luigi ^{[1
]}

Basset, Jean-Marie ^{[1
]}

机构：

[1] King Abdullah Univ Sci & Technol, KAUST Catalysis Ctr KCC, Thuwal 239556900, Saudi Arabia

[2] Univ Girona, Inst Quim Computac & Catalisi, Campus Montilivi, Girona 17003, Catalonia, Spain

[3] Univ Girona, Dept Quim, Campus Montilivi, Girona 17003, Catalonia, Spain

[4] King Abdullah Univ Sci & Technol, Imaging & Characterizat Core Lab, Thuwal 239556900, Saudi Arabia

来源：

CHEMICAL COMMUNICATIONS | 2016年 / 52卷 / 75期

关键词：

CARBENE COMPLEXES; ALKANE METATHESIS; CATALYSTS; HEXAMETHYLTUNGSTEN; EFFICIENT; SI-O-WME5; W(CH3)(6); WME6;

D O I：

10.1039/c6cc05352a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A method for the synthesis of a homogeneous cationic tungsten(VI)penta-methyl complex [(WMe5)(+)(C6F5)(3)BMe-] from neutral tungstenhexamethyl (WMe6) and a silica supported cationic tungstentetramethyl complex [( Si-O-)WMe4+ (C6F5)(3)BMe-] from a neutral silica supported tungstenpentamethyl complex [( Si-O-)WMe5] is described. In both cases a direct demethylation using the B(C6F5)(3) reagent was used. The aforesaid complexes were characterized by liquid or solid state NMR spectroscopy. Interestingly, the homogeneous cationic complex [(WMe5)(+)(C6F5)(3)BMe-] shows moderate activity whereas the supported cationic complex [( Si-O-)WMe4+(C6F5)(3)BMe-] exhibits good activity in olefin metathesis reactions.

引用

页码：11270 / 11273

页数：4

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