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oai:ojs.www.eurjchem.com:article/227 2011-06-30T10:44:15Z eurjchem:SC driver

Synthesis and electrochemistry of dimanganese(II) complexes of phenol-based dinucleating ligands with four methoxyethyl chelating arms Nakayama, Yuuki Unoura, Kei Igarashi, Yasuhiro Hossain, Md. Jamil Sakiyama, Hiroshi Dimanganese(II) complex Dinucleating ligand Electrochemistry p-Substituent DFT Redox potential Dimanganese(II) complexes [Mn2(bonp)(PhCO2)2]PF6 (1) and [Mn2(bocp)(PhCO2)2]PF6 (2) were synthesized with p-nitro- and p-chloro-substituted phenol-based dinucleating ligands bonp- [2,6-bis[bis(2-methoxyethyl)aminomethyl]-4-nitrophenolate anion] and bocp- [4-chloro-2,6-bis[bis(2-methoxyethyl)aminomethyl]phenolate anion], respectively, with the aim of controlling the redox potentials of the dimanganese center by changing the p-substituents in the dinucleating ligands. Cyclic voltammograms of 1 and 2 showed quasi-reversible oxidation processes, assigned to MnIIMnII/MnIIMnIII, at 1.17 and 1.00 V vs. Ag/AgCl, respectively. Compared to the previous p-methyl complex [Mn2(bomp)(PhCO2)2]PF6 (3) [bomp–: 2,6-bis[bis(2-methoxyethyl)aminomethyl]-4-methylphenolate anion] (0.96 V vs. Ag/AgCl), the order of the potentials was 1(-NO2) > 2(-Cl) > 3(-CH3). Thus, the redox potentials of the dimanganese centers were controlled by the p-substituents in the dinucleating ligands. Atlanta Publishing House LLC 2011-06-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://www.eurjchem.com/index.php/eurjchem/article/view/227 10.5155/eurjchem.2.2.266-268.227 European Journal of Chemistry; Vol. 2 No. 2 (2011): June 2011; 266-268 2153-2257 2153-2249 eng https://www.eurjchem.com/index.php/eurjchem/article/view/227/PDF