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Synthesis, characterization, and electrochemical behavior of mixed-ligand complexes of cobalt(III) with dimethylglyoxime and some amino acids.

Abstract : The syntheses of non‐electrolyte complexes of the general formula [Co(Hdmg)2(HA)X], where Hdmg˭dimethylglyoximato monoanion, HA˭glycine (Gly), Serine (Ser), Cysteine (Cys) or Cystine (Cys–Cys) and X˭Cl, Br, I, SCN are described. The structure of the complexes proposed according to elemental analyses, IR, UV‐Visible and 1H NMR spectra is pseudo-octahedral. The cyclic voltammograms in DMSO at a GC disk electrode consist of two processes (I and II) corresponding to oxidations, whereas the redox systems III and IV appear to be associated with reduction processes. The Co(II)/Co(I) redox couple is reversible for various complexes and is relatively insensitive to the axial ligand. The Co(III)/Co(II) couple depends on the axial ligation, shows chemical irreversibility and has a much slower rate of electron transfer than the Co(II)/Co(I) couple due to the strong binding of the Lewis base to the Co(III) ion.
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https://hal.univ-angers.fr/hal-03224710
Contributeur : Mustayeen Khan <>
Soumis le : jeudi 13 mai 2021 - 13:00:12
Dernière modification le : lundi 17 mai 2021 - 09:29:14
Archivage à long terme le : : samedi 14 août 2021 - 18:02:15

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A. Adkhis, S. Djebbar, O. Benali-Baïtich, A. Kadri, Mustayeen A. Khan, et al.. Synthesis, characterization, and electrochemical behavior of mixed-ligand complexes of cobalt(III) with dimethylglyoxime and some amino acids.. Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry, Informa UK (Marcel Dekker), 2003, 33 (1), pp.35-50. ⟨10.1081/SIM-120016871⟩. ⟨hal-03224710⟩

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