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• W1975156386 abstract "Abstract The complex [MnIII(HL)(L)(py)(CH3OH)]·CH3OH (H2L = 2-ortho-hydroxyphenylbenzimidazole, py = pyridine), 1, has been characterized spectroscopically and by X-ray crystallography. The complex is triclinic, space group with a = 10.396(2), b = 10.7340(10), c = 15.193(2) Å, α = 73.193(4)°, β = 76.283(8)°, γ = 61.400(40)°, V = 1415.1(4) Å3, Z = 2, D c = 1.445 Mg m−3, M r = 615.56, μ = 0.515 mm−1, F(000) = 640, R = 0.0631, w R = 0.1525. Manganese is six-coordinate in an N3O3 ligand sphere created by two bidentate H2L ligands and solvent molecules with a slightly distorted, axially elongated octahedral geometry. Electronic absorption spectra show π–π* and Ligand Metal Charge Transfer (LMCT) transitions in the UV region and d–d transitions in the visible region. Solvent molecules coordinated to the Mn(III) ion in the crystal are thought to retain their coordination in solution. It is shown that 1 has reaction activity with the superoxide ion, as indicated by inhibition of pyrogallol autoxidation and by spin trapping electron paramagnetic resonance (EPR) spectroscopy. The N3O3 ligand set in 1 is similar to that in native MnSOD (superoxide dismutatase) in the substrate-bound state. The correlation between the ligand set in 1 and its reaction with the superoxide ion is discussed. Keywords: Manganese(III)2-o-HydroxyphenylbenzimidazolePyridineX-ray structureSuperoxide dismutaseSuperoxide ion reactivity2,2-Dimethyl-3,4-dihydro-2H-pyrrole-1-oxideSpin trapPyrogallol autoxidation Acknowledgements The work was supported by the National Natural Science Foundation of China (30128003, 20473098 and 20175032). Authors WS, SS and PH express their thanks to the Swedish Energy Agency and DESS for financial support and to the Swedish Consortium for Artificial Photosynthesis for access to technical facilities. PH thanks the Swedish Stiftelsen Bengt Lundqvists Minne for financial support." @default.
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• W1975156386 date "2006-01-20" @default.
• W1975156386 modified "2023-10-04" @default.
• W1975156386 title "Synthesis and characterization of a six-coordinate monomeric Mn(III) complex with SOD-like activity" @default.
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• W1975156386 doi "https://doi.org/10.1080/00958970500249814" @default.
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