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Issue 11, 2009
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Unique formation of mono-, tetra- and nona-nuclear zinc complexes from protonolysis reactions of [Zn(dmpzm)Et2]

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Abstract

Protonolysis reactions of [Zn(dmpzm)Et2] (1) with acetic or formic acid in different molar ratios gave rise to four mononuclear zinc complexes [ZnEt(dmpzm)(L)] (2: L = OAc; 3: L = HCOO) and [Zn(dmpzm)(L)2] (4: L = OAc; 5: L = HCOO), one nonanuclear zinc complex [Zn(μ4-O)2(ZnEt)63-OAc)4(μ′3-OAc)2{Zn(dmpzm)Et}2] (6), and one tetranuclear zinc complex [Zn44-O)(dmpzm)3Et3] (7). Compounds 1–7 were characterized by elemental analysis, IR spectra, 1H NMR spectra, and the crystal structures of 1, 3, 4, 6, and 7 were determined by single-crystal X-ray crystallography. In the structures of 1, 3, and 4, the central Zn atom is tetrahedrally coordinated by two N atoms of one dmpzm and two C atoms of two Et groups (1), or one C atom of one Et group and one O atom of formate ligand (3), or two O atoms of two acetates (4). In the structure of 6, a heptanuclear [Zn(μ4-O)2(ZnEt)63-OAc)4] core is connected with two [Zn(dmpzm)Et]+ fragments via a pair of μ′3-OAc ligands. Compound 7 consists of a Zn44-O) tetrahedron in which three Zn atoms are further saturated by two N atoms from dmpzm ligands and an ethyl group while one Zn center is coordinated by three C atoms from the methylene group of the three dmpzm ligands.

Graphical abstract: Unique formation of mono-, tetra- and nona-nuclear zinc complexes from protonolysis reactions of [Zn(dmpzm)Et2]

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Publication details

The article was received on 05 Nov 2008, accepted on 16 Dec 2008 and first published on 29 Jan 2009


Article type: Paper
DOI: 10.1039/B819637K
Citation: Dalton Trans., 2009, 2012-2019
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    Unique formation of mono-, tetra- and nona-nuclear zinc complexes from protonolysis reactions of [Zn(dmpzm)Et2]

    M. Cheng, H. Li, L. Liu, H. Wang, Y. Zhang and J. Lang, Dalton Trans., 2009, 2012
    DOI: 10.1039/B819637K

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