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Characterization of a Dinuclear Copper(II) Complex and Its Fleeting Mixed-Valent Copper(II)/Copper(III) Counterpart

Abstract : The synthesis of a dinuclear copper(II) complex, supported by a 1,3-diamino-2-propanol-based tetraamide ligand, is reported. Structural properties in the solid state and in solution, by means of XRD analysis and NMR spectroscopy, respectively, provide evidence of a highly flexible complex that can display several conformations, leading to the image of the wings of a butterfly. The complex was fully characterized and the redox properties were investigated. Room-temperature spectro-electrochemistry was used to monitor the formation of a metastable mono-oxidized product that displayed an absorption band centered at λ=463 nm. EPR investigation of the low-temperature, chemically generated, mono-oxidized product reveals the presence of an intermediate described as a mixed-valent CuIICuIII species, which is a model of the possible highly oxidizing intermediate in particulate methane monooxygenase.
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https://hal.univ-brest.fr/hal-01624533
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Submitted on : Thursday, December 16, 2021 - 4:15:04 PM
Last modification on : Friday, January 7, 2022 - 3:56:16 AM
Long-term archiving on: : Thursday, March 17, 2022 - 7:27:31 PM

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Amélie Kochem, Federica Gennarini, Mehdi Yemloul, Maylis Orio, Nicolas Le Poul, et al.. Characterization of a Dinuclear Copper(II) Complex and Its Fleeting Mixed-Valent Copper(II)/Copper(III) Counterpart. ChemPlusChem, Wiley, 2017, 82 (4), pp.615 - 624. ⟨10.1002/cplu.201600636⟩. ⟨hal-01624533⟩

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