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    Sandwich compounds of cyanotrispyrazolylborates: complexation-induced ligand isomerization

    Date
    2007-10-15
    Author
    Zhao, Ningfeng
    Van Stipdonk, Michael J.
    Bauer, Cary
    Campana, Charles
    Eichhorn, David M.
    Metadata
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    Citation
    Inorganic chemistry. 2007 Oct 15; 46(21): 8662-7.
    Abstract
    Reaction of the new cyanoscorpionate ligand, hydrotris(4-cyano-3-phenyl)pyrazolylborate (Tp(Ph),(4CN)) with Co(II), Mn(II), and Fe(II) unexpectedly results in the isolation only of crystals containing sandwich complexes in which the ligands have been isomerized to produce the heterocyanoscorpionate hydrobis(4-cyano-3-phenylpyrazolyl)(4-cyano-5-phenylpyrazolyl)borate (Tp(Ph),(4CN*)). The three complexes have been characterized crystallographically and are isostructural, with each ligand acting in a tridentate manner toward the metal. The isomerization of the ligand appears to be more facile than that of the analogous non-cyano ligand, Tp(Ph), with which crystals of the unisomerized sandwich compound have been isolated for Mn(II) and Fe(II).
    Description
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    URI
    http://dx.doi.org/10.1021/ic700628b
    http://hdl.handle.net/10057/4325
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