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Metal complexes of N, N, N ' N '-tetrakis(2-pyridylmethyl)ethylenediamine (TPEN): Variable coordination numbers and geometries
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UNSPECIFIED (2006) Metal complexes of N, N, N ' N '-tetrakis(2-pyridylmethyl)ethylenediamine (TPEN): Variable coordination numbers and geometries. POLYHEDRON, 25 (2). pp. 513-520. doi:10.1016/j.poly.2005.08.019 ISSN 0277-5387.
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Official URL: http://dx.doi.org/10.1016/j.poly.2005.08.019
Abstract
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.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry | ||||
Journal or Publication Title: | POLYHEDRON | ||||
Publisher: | PERGAMON-ELSEVIER SCIENCE LTD | ||||
ISSN: | 0277-5387 | ||||
Official Date: | 23 January 2006 | ||||
Dates: |
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Volume: | 25 | ||||
Number: | 2 | ||||
Number of Pages: | 8 | ||||
Page Range: | pp. 513-520 | ||||
DOI: | 10.1016/j.poly.2005.08.019 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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