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• W2809891325 abstract "A kineticomechanistic study of reversible electron-transfer processes undergone by the water-soluble, cyanido-bridged mixed-valence [{CoIII{(Me)2(μ-ET)cyclen}}2{(μ-NC)2FeII(CN)4}2]2– square has been carried out. The oxidation reaction consists of a two-step process with the participation of a solvent-assisted outer-sphere complex, as a result of the establishment of hydrogen bonds that involve the oxo groups of the oxidant (peroxodisulfate) and the terminal cyanido ligands of the tetrametallic square. The formally endergonic reduction reaction of the fully oxidized ([{CoIII{(Me)2(μ-ET)cyclen}}2{(μ-NC)2FeIII(CN)4}2]) core by water, producing hydrogen peroxide from water even at low pH values, is also a two-step process. Each one of these processes requires a set of two preequilibria involving the association of OH– and its subsequent deprotonation by a further OH– anion. The structure of the square compound in its fully protonated form has also been determined by X-ray diffraction and shows the existence of strong hydrogen-bonding interactions, in agreement with the rather high basicity of the terminal cyanido ligands. Likewise, density functional theory calculations on the tetrametallic complex showed zones with negative electrostatic potential around the FeII centers of the square that would account for the establishment of the hydrogen bonds found in the solid state. Spectroelectrochemistry experiments demonstrated the singular stability of the {CoIII/FeII}22– complex, as well as that of their partially, {Co2III/FeIIIFeII}−, and fully, {CoIII/FeIII}2, oxidized counterparts because no hysteresis was observed in these measurements." @default.
• W2809891325 created "2018-07-10" @default.
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• W2809891325 date "2018-07-03" @default.
• W2809891325 modified "2023-10-18" @default.
• W2809891325 title "Kineticomechanistic Study of the Redox pH Cycling Processes Occurring on a Robust Water-Soluble Cyanido-Bridged Mixed-Valence {Co^III/Fe^II}₂ Square" @default.
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• W2809891325 doi "https://doi.org/10.1021/acs.inorgchem.8b01147" @default.
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• W2809891325 hasPublicationYear "2018" @default.
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