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    Structural diversity in the first metal complexes of 2,5-dicarboxamidopyrroles and 2,5-dicarbothioamidopyrroles

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    Access Status
    Open access
    Authors
    Bates, G.
    Gale, P.
    Light, M.
    Ogden, Mark
    Warriner, C.
    Date
    2008
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Bates, Gareth and Gale, Philip and Light, Mark and Ogden, Mark and Warriner, Colin. 2008. Structural diversity in the first metal complexes of 2,5-dicarboxamidopyrroles and 2,5-dicarbothioamidopyrroles. Dalton Transactions. 31: pp. 4106-4112.
    Source Title
    Dalton Transactions
    DOI
    10.1039/b802506a
    ISSN
    14779226
    Faculty
    Department of Applied Chemistry
    Nanochemistry Research Institute (Research Institute)
    School of Science
    Faculty of Science and Engineering
    Remarks

    This journal is © The Royal Society of Chemistry 2008

    URI
    http://hdl.handle.net/20.500.11937/23664
    Collection
    • Curtin Research Publications
    Abstract

    Metal complexes of 2,5-dicarboxamidopyrroles and 2,5-dicarbothioamidopyrroles have been structurally characterised for the first time, complementing the significant amount of work that has been reported for the analogous pyridine ligands. N,N!-Bis(3,5-dinitrophenyl)-3,4-diphenyl-1H-pyrrole-2,5-dicarboxamide forms octahedral bis(tridentate) complexes with cobalt(III) and nickel(II), where the ligands are bound to the metal centres through deprotonated pyrrole and amide N atoms. N,N!-Dibutyl-3,4-diphenyl-1H-pyrrole-2,5-dicarboxthioamide and N,N!-diphenyl-3,4-diphenyl-1H-pyrrole-2,5-dicarboxthioamide also form bis(tridentate) cobalt complexes but are only deprotonated at the pyrrole N atom, the remainder of the coordination sphere comprising the thioamide S atoms. The dibutyl derivative was isolated as a Co(II) complex, whereas the diphenyl system deposited a Co(III) complex. In contrast, N,N!-dibutyl-3,4-dichloro-1H-pyrrole-2,5- dicarboxamide was found to act as a bidentate ligand, in an octahedral cobalt(II) complex comprising of two bidentate pyrrole ligands, and two aqua ligands. Synthesis of N,N-bis(pyridin-2-ylmethyl)-3,4-diphenyl-1H-pyrrole-2,5-carboxamide gave a pyrrole ligand with increased denticity. Reaction with cobalt(II) chloride resulted in the isolation of a dinuclear helicate complex. The ligand was found to have undergone addition of a methoxy group to one of the linking methylene carbons, presumably as a result of the oxidative addition of solvent methanol.

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