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Issue 11, 2005
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Manganese(II) chemistry of a new N3O-donor chelate ligand: synthesis, X-ray structures, and magnetic properties of solvent- and oxalate-bound complexes

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Abstract

The synthesis and characterization of a new N3O donor ligand N-benzyl-N-((6-pivaloylamido-2-pyridyl)methyl)-N-(2-pyridylmethyl)amine (bpppa) is reported. Treatment of bpppa with Mn(II)(ClO4)2·6H2O in acetonitrile solution yielded the mononuclear [(bpppa)Mn(CH3CN)(H2O)](ClO4)2 (1) which was characterized by X-ray crystallography, elemental analysis, IR spectroscopy, mass spectrometry, and a solution magnetic moment measurement. Admixture of equimolar equivalents of bpppa and Mn(II)(ClO4)2·6H2O in methanol solution, followed by addition of 0.5 or 1 equivalents of sodium oxalate, yielded the binuclear complex [{(bpppa)Mn}2(μ-C2O4)](ClO4)2 (2), which was characterized by X-ray crystallography, elemental analysis, IR spectroscopy, mass spectrometry, and solid-state magnetic measurements. While 1 is mononuclear, the formation of the binuclear oxalate derivative 2 indicates that use of the bpppa ligand does not enable isolation of a complex that is structurally relevant to a proposed 1 ∶ 1 Mn(II)–oxalate adduct in the catalytic cycle of the oxalate degrading enzyme oxalate decarboxylase.

Graphical abstract: Manganese(ii) chemistry of a new N3O-donor chelate ligand: synthesis, X-ray structures, and magnetic properties of solvent- and oxalate-bound complexes

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Publication details

The article was received on 12 Jan 2005, accepted on 12 Apr 2005 and first published on 28 Apr 2005


Article type: Paper
DOI: 10.1039/B500534E
Citation: Dalton Trans., 2005,0, 1891-1896
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    Manganese(II) chemistry of a new N3O-donor chelate ligand: synthesis, X-ray structures, and magnetic properties of solvent- and oxalate-bound complexes

    A. L. Fuller, R. W. Watkins, K. R. Dunbar, A. V. Prosvirin, A. M. Arif and L. M. Berreau, Dalton Trans., 2005, 0, 1891
    DOI: 10.1039/B500534E

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