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- W3033852053 abstract "Mononuclear cobalt(III) complexes of 3,5-di-tert-butylcatecholato cobalt complex of the substituted bis(phenol) diamine ligands of H2LNEX (CoLNEX(DTBC) which X: BM, Bu and OB stands for 2-(tert-butyl)-4-methyl, 2,4-di-tert-butyl and 2-(tert-butyl)-4-methoxy phenols, respectively, and DTBC is an abbreviation for 2,4-di-tert-butylcatechol, as models for enzyme-substrate adducts of catechol dioxygenases, have been synthesized and characterized by different techniques. X-ray structure analysis has revealed that cobalt centers were surrounded by two phenolates, two amine nitrogens and two oxygen atoms of catechol ligand. For all three compounds, the magnetic susceptibility increases with decreasing temperature as expected for non-interacting, magnetic moments which confirm the monomeric structure of cobalt complexes and valence tautomerism between Co(II) and Co(III) oxidation state. Crystal structures confirm the nature of Co(II)/Co(III) character consistent with the magnetic experiments. In electronic absorption spectra of two complexes, the position of LMCT bands show the phenolate(π)-to- Co(II) or Co(III) (dπ*) charge transfer. The cyclic voltammetry studies, show the ligand-centered oxidation of phenolate group to phenoxyl radical." @default.
- W3033852053 created "2020-06-12" @default.
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- W3033852053 date "2020-09-01" @default.
- W3033852053 modified "2023-10-17" @default.
- W3033852053 title "Valence tautomerism in catecholato cobalt Bis(phenolate) diamine complexes as models for Enzyme–substrate adducts of catechol dioxygenases" @default.
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- W3033852053 doi "https://doi.org/10.1016/j.poly.2020.114620" @default.
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