Bimetallic reactivity. One-site addition two-metal oxidation reactions using a di-Co(II) complex of a binucleating ligand with 5-and 6-coordinate sites

被引：34

作者：

Incarvito, C

Rheingold, AL ^{[1
]}

Gavrilova, AL

Qin, CJ

Bosnich, B

机构：

[1] Univ Delaware, Dept Chem & Biochem, Newark, DE 19716 USA

[2] Univ Chicago, Dept Chem, Chicago, IL 60637 USA

来源：

INORGANIC CHEMISTRY | 2001年 / 40卷 / 17期

关键词：

D O I：

10.1021/ic010235r

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The preparation of an unsymmetrical binucleating ligand bearing a bridging oxadiazole ring flanked on one side by three ligands and on the other by four ligands is described. When bound to two metals, the ligand forms complexes where the metals are in 5- and 6-coordinate sites after the incorporation of an exogenous bridging ligand. A di-Co2+ complex of th is ligand has been prepared containing a hydroxide bridge. The complex is readily oxidized to the di-Co3+ state by outer sphere electron transfer with ferrocenium ions. Addition of Br-2 or NO2+ to the di-Co2+ complex leads to the rapid formation of the di-Co3+ bromo or nitro complexes, respectively. The ligand characteristics which allow for double oxidation with ferrocenium ions and for the one-site addition two-metal oxidations with Br-2 and NO2+ are discussed in terms of mechanical coupling between the two metal sites.

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页码：4101 / 4108

页数：8

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