%0 Journal Article
%T Synthesis and electrochemistry of dimanganese(II) complexes of phenol-based dinucleating ligands with four methoxyethyl chelating arms
%A Yuuki Nakayama
%A Kei Unoura
%A Yasuhiro Igarashi
%A Md. Jamil Hossain
%J European Journal of Chemistry
%D 2011
%I 
%R 10.5155/eurjchem.2.2.266-268.227
%X 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¨C: 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.
%K Dimanganese(II) complex
%K Dinucleating ligand
%K Electrochemistry
%K p-Substituent
%K DFT
%K Redox potential
%U http://www.eurjchem.com/index.php/eurjchem/article/view/227