Počet záznamů: 1  

Copper Complexes with Non-innocent Ligands: Probing Cu-II/catecholato-Cu-I/o-Semiquinonato Redox Isomer Equilibria with EPR Spectroscopy

  1. 1.
    0181549 - UFCH-W 20020181 RIV CH eng J - Článek v odborném periodiku
    Kaim, W. - Wanner, M. - Knödler, A. - Záliš, Stanislav
    Copper Complexes with Non-innocent Ligands: Probing Cu-II/catecholato-Cu-I/o-Semiquinonato Redox Isomer Equilibria with EPR Spectroscopy.
    Inorganica chimica acta. Roč. 337, - (2002), s. 163-172. ISSN 0020-1693. E-ISSN 1873-3255
    Grant CEP: GA MŠMT OC D14.20
    Výzkumný záměr: CEZ:AV0Z4040901
    Klíčová slova: copper compounds * EPR spectroscopy * quinone ligands
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 1.566, rok: 2002

    The temperature-dependent intramolecular metal/ligand electron transfer equilibrium (L)Cu-II(Q(2-))reversible arrow(L)Cu-I(Q(.-)) has been quantitatively analyzed by EPR as a function of the non-innocent o-quinonoid ligand Q and of the co-ligand L. Suitable co-ligands were 1-methyl-(2-methylthiomethyl)-1H-benzimidazole and 1-diphenylphosphino-2-dimethylaminoethane (dde) which can tolerate both copper oxidation states. EPR hyperfine data were extracted for a variety of alkyl- and methoxy-substituted o-semiquinones and their copper(l) complexes in solution. A close match of Q and Cu redox orbitals is essential for observing the redox isomer equilibrium which has been similarly reported for aminoxidase enzymes. Efforts to isolate the mixed-ligand compounds from solution failed due to coordination disproportionation. The new [Cu(dde)(2)](ClO4) was structurally characterized with comparable Cu-N and Cu-P distances of 2.24-2.27 Angstrom and a P-Cu-P angle of 142.41(5)degrees.
    Trvalý link: http://hdl.handle.net/11104/0078103

     
     

Počet záznamů: 1  

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