Metal complexes of N, N, N′ N′-tetrakis(2-pyridylmethyl)ethylenediamine (TPEN):: Variable coordination numbers and geometries

被引：42

作者：

Blindauer, CA

Razi, MT

Parsons, S

Sadler, PJ

机构：

[1] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JJ, Midlothian, Scotland

[2] Univ Warwick, Dept Chem, Coventry CV4 7AL, W Midlands, England

[3] Bahauddin Zakariya Univ, Dept Pharm, Multan, Pakistan

来源：

POLYHEDRON | 2006年 / 25卷 / 02期

基金：

英国惠康基金;

关键词：

denticity; zinc; copper; cadmium; X-ray; NMR spectroscopy;

D O I：

10.1016/j.poly.2005.08.019

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We report X-ray crystal structures of complexes of the membrane-permeable metal chelator N,N,N',N'-tetrakis(2-pyridylmethyl)ethylenediamine (TPEN) with Cu(II) and Zn(II), and solution studies of the Zn(II) and Cd(II) complexes. [Zn(II)(TPEN)](PF6)(2) exhibits a distorted octahedral geometry with hexadentate TPEN, whilst [Cu(II)(TPEN)(PF6)(2) contains penta-coordinated Cu(II), with one pendant picolyl arm of TPEN. A survey of structures of metal-TPEN complexes reveals the versatility of the TPEN ligand. Complexes of V(V), Cr(III), Rh(III), Re(VII), Fe(II), as well as Cu(II) are known which contain hypodentate TPEN with 3-5 of its nitrogens coordinated to the metal. Solution NMR spectroscopic studies also suggest that there is dynamic conformational flexibility in the structures of the [Zn(TPEN)](2+) and [Cd(TPEN)](2+) complexes in aqueous solution. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：513 / 520

页数：8

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