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Issue 20, 2008
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Synthesis and characterization of mono- and μ6-sulfato hexanuclear zinc complexes of a new symmetric dinucleating ligand

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Abstract

Zinc complexes of a new symmetric dinucleating ligand, N,N′-Bis[2-carboxybenzomethyl]-N,N′-Bis[carboxymethyl]-1,3-diaminopropan-2-ol (H5ccdp) with mixed donating groups, have been studied in the solid state as well as in solution. In methanol, the reaction of stoichiometric and substoichiometric amounts of Zn(ClO4)2·6H2O and the ligand H5ccdp, in the presence of K2CO3 or Et3N, afforded a mononuclear zinc complex, [Zn(H2O)6][Zn(H2ccdp)(H2O)2]2·12H2O (1). The solid state structure of 1 contains two units of the zinc-ligand anion, [Zn(H2ccdp)(H2O)2], and one [Zn(H2O)6]2+ counter cation. The Zn(II) center of the anion is in a distorted octahedral geometry. However, in methanol, the reaction of ZnSO4·7H2O and the ligand H5ccdp in the presence of NaOH afforded a unique μ6-sulfato hexanuclear zinc complex, Na6[Zn6(ccdp)36-SO4)](OH)·10.5H2O (2). The structure of 2 contains a [ZnII66-SO4)] core unit which is held together by three heptadentate bridging ligands, ccdp5−. Three of the Zn(II) centers are in highly distorted square pyramidal geometry, the other three Zn(II) centers are in a distorted octahedral geometry.

Graphical abstract: Synthesis and characterization of mono- and μ6-sulfato hexanuclear zinc complexes of a new symmetric dinucleating ligand

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Supplementary files

Article information


Submitted
20 Dec 2007
Accepted
04 Feb 2008
First published
07 Mar 2008

Dalton Trans., 2008, 2717-2724
Article type
Paper

Synthesis and characterization of mono- and μ6-sulfato hexanuclear zinc complexes of a new symmetric dinucleating ligand

A. B. S. Curtiss, M. Bera, G. T. Musie and D. R. Powell, Dalton Trans., 2008, 2717
DOI: 10.1039/B719646F

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