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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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Publication details

The article was received on 20 Dec 2007, accepted on 04 Feb 2008 and first published on 07 Mar 2008


Article type: Paper
DOI: 10.1039/B719646F
Citation: Dalton Trans., 2008, 2717-2724
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    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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