MURAL - Maynooth University Research Archive Library



    Synthesis and characterization of the tetranuclear iron(III) complex of a new asymmetric multidentate ligand. A structural model for purple acid phosphatases


    Boudalis, Athanassios K. and Aston, Robyn E. and Smith, Sarah J. and Mirams, Ruth E. and Riley, Mark J. and Schenk, Gerhard and Blackman, Allan G. and Hanton, Lyall R. and Gahan, Lawrence R. (2007) Synthesis and characterization of the tetranuclear iron(III) complex of a new asymmetric multidentate ligand. A structural model for purple acid phosphatases. Dalton Transactions. pp. 5132-5139. ISSN 1477-9226

    [img] Download (309kB)


    Share your research

    Twitter Facebook LinkedIn GooglePlus Email more...



    Add this article to your Mendeley library


    Abstract

    The ligand, 2-((2-hydroxy-5-methyl-3-((pyridin-2-ylmethylamino)methyl)benzyl)(2-hydroxybenzyl)amino)acetic acid (H3HPBA), which contains a donor atom set that mimics that of the active site of purple acid phosphatase is described. Reaction of H3HPBA with iron(III) or iron(II) salts results in formation of the tetranuclear complex, [Fe4(HPBA)2(OAc)2(µ-O)(µ-OH)(OH2)2]ClO4·5H2O. X-Ray structural analysis reveals the cation consists of four iron(III) ions, two HPBA3− ligands, two bridging acetate ligands, a bridging oxide ion and a bridging hydroxide ion. Each binucleating HPBA3− ligand coordinates two structurally distinct hexacoordinate iron(III) ions. The two metal ions coordinated to a HPBA3− ligand are linked to the two iron(III) metal ions of a second, similar binuclear unit by intramolecular oxide and hydroxide bridging moieties to form a tetramer. The complex has been further characterised by elemental analysis, mass spectrometry, UV-vis and MCD spectroscopy, X-ray crystallography, magnetic susceptibility measurements and variable-temperature Mössbauer spectroscopy.

    Item Type: Article
    Keywords: tetranuclear iron(III) complex; asymmetric multidentate ligand; purple acid phosphatases;
    Academic Unit: Faculty of Science and Engineering > Chemistry
    Item ID: 3690
    Depositing User: Gary Schenk
    Date Deposited: 28 May 2012 16:02
    Journal or Publication Title: Dalton Transactions
    Publisher: Royal Society of Chemistry
    Refereed: Yes
    URI:

      Repository Staff Only(login required)

      View Item Item control page

      Downloads

      Downloads per month over past year