Trinuclear Metallacycles: Metallatriangles and Much More

被引：242

作者：

Zangrando, Ennio ^{[1
]}

Casanova, Massimo ^{[1
]}

Alessio, Enzo ^{[1
]}

机构：

[1] Univ Trieste, Dipartimento Sci Chim, I-34127 Trieste, Italy

来源：

CHEMICAL REVIEWS | 2008年 / 108卷 / 12期

关键词：

D O I：

10.1021/cr8002449

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The geometry of trinuclear metallacrycles, obtained according to the principles of self-assembly, which includes the combination of metal fragments with two labile ligands and ditopic linkers, is studied. The directional-bonding approach shows that the design of molecular triangular metallacrycles require that six rigid ditopic components, the angular, and three linear, are assembled in a cyclic manner. Diffusion-ordered NMR spectroscopy (DOSY), based on pulse-gradient spin-echo (PGSE) NMR experiments, is a tool to distinguish the different nuclearity of metallacycles. A square planar metal center obtains a homoleptic trinuclear metallacrycles in which each corner is composed by a pair of angular linkers with monodentate binding units and coordinated vectors. X-ray structure show that, in the solid state, the flexible bmpze linkers assume a conformation in which the two coordinate vectors make a ca. 60° angle, representing the vertexes of metallacrycles.

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页码：4979 / 5013

页数：35

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