Relocalisation of the π system in benzoquinonediimines induced by metal coordination

被引：24

作者：

Braunstein, P ^{[1
]}

Dernessence, A ^{[1
]}

Siri, O ^{[1
]}

Taquet, JP ^{[1
]}

机构：

[1] Univ Strasbourg 1, CNRS, Inst Le Bel, Chim Coordinat Lab,UMR 7513, F-67070 Strasbourg, France

来源：

COMPTES RENDUS CHIMIE | 2004年 / 7卷 / 8-9期

关键词：

pi-systems; benzoquinonediimines; metal coordination; UV-visible absorption; tungsten carbonyl complexes;

D O I：

10.1016/j.crci.2004.02.012

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report the synthesis and characterization of the tungsten carbonyl complexes Cis-[W(CO)(4)C6H2(NHR)(2) (=NR)(2)] (8, R = neopentyl; 10, R = benzyl), which contain a chelating ortho-diimine moiety. Their formation can be explained by a metal coordination-induced relocalisation of the pi system of the precursor para-benzoquinonediimine ligand C6H2(NHR)(2)(=NR)(2) (3, R = neopentyl; 9, R = benzyl). The UV-visible spectra of complexes 8 and 10 revealed the presence of a strong band at 607 and 620 nm, respectively, which is characteristic of a MLCT transition. (C) 2004 Academie des sciences. Published by Elsevier SAS. All rights reserved.

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页码：909 / 913

页数：5

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