"10"^^ . "N/A" . . "337" . . . . "Copper Complexes with Non-innocent Ligands: Probing Cu-II/catecholato-Cu-I/o-Semiquinonato Redox Isomer Equilibria with EPR Spectroscopy."@en . "Copper Complexes with Non-innocent Ligands: Probing Cu-II/catecholato-Cu-I/o-Semiquinonato Redox Isomer Equilibria with EPR Spectroscopy." . "Copper Complexes with Non-innocent Ligands: Probing Cu-II/catecholato-Cu-I/o-Semiquinonato Redox Isomer Equilibria with EPR Spectroscopy."@en . "163;172" . . . "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." . . "RIV/61388955:_____/02:54020181" . "Z\u00E1li\u0161, Stanislav" . "Kaim, W." . "Wanner, M." . . . "Kn\u00F6dler, A." . "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."@en . "copper compounds; EPR spectroscopy; quinone ligands"@en . . "641774" . "Inorganica Chimica Acta" . . . "Copper Complexes with Non-innocent Ligands: Probing Cu-II/catecholato-Cu-I/o-Semiquinonato Redox Isomer Equilibria with EPR Spectroscopy." . "1"^^ . . "[FA1824267A2C]" . . . "4"^^ . "0"^^ . "0"^^ . . "RIV/61388955:_____/02:54020181!RIV/2003/AV0/A54003/N" . "P(OC D14.20), Z(AV0Z4040901)" . "CH - \u0160v\u00FDcarsk\u00E1 konfederace" . . "0020-1693" .