Mononuclear tungsten(VI) complexes with bis(phenolato) ligands:: syntheses, characterisations and activity in ROMP reaction

被引：7

作者：

Lehtonen, A ^{[1
]}

Sillanpää, R

机构：

[1] Univ Turku, Dept Chem, FIN-20014 Turku, Finland

[2] Univ Jyvaskyla, Dept Chem, FIN-40351 Jyvaskyla, Finland

来源：

POLYHEDRON | 2002年 / 21卷 / 9-10期

关键词：

X-ray; mononuclear tungsten(VI) complexes; ligand; heteroleptic;

D O I：

10.1016/S0277-5387(02)00897-5

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The reaction of bulky ligand precursor 2,2-methylenebis(4-methyl-6-tert-butylphenol) (H(2)mbp) or 2,2'-ethylidenebis(4,6-di-tertbutylphenol) (H(2)ebp) with trisdiolatotungsten(VI) complex [W(eg)(3)] 1 (eg = ethanediolate dianion) provides heteroleptic complexes [W(mbp)(eg)(2)] 2 or [W(ebp)(eg)(2)] 3, respectively. Sterically less hindered 2,2'-dihydroxy-1,1'-dinaphtylmethane (H(2)dinap) forms heteroleptic disubstituted complex [W(dinap)(2)(eg)] 4. The X-ray crystal structure determinations confirmed that the isolated compounds are made of monomeric tris(diolato)tungsten(VI) molecules in which the central tungsten atom is bonded to six oxygen atoms forming a distorted octahedral coordination sphere around the metal ion. Complexes 2 and 3 catalyse the ring opening metathesis reaction of norbornene when activated by Et2AlCl. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1017 / 1022

页数：6

共 24 条

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