Abstract
The following complexes(1)~(4) with catecholate and semiquinone ligands were synthesized and physical properties of complexes(1)~(4) were measured by X-ray Single diffraction, UV-Vis spectroscopy, infrared spectra, element analyzer, and Electronchemical analysises. Iron(Ⅲ) complexes with catecholate and semiquinone ligands were prepared: (1) [Fe(L1)(C6Cl4O2)]2•OCH3 (2) [Fe(L2)(C6Cl4O2)Cl2] (3) [Fe(L2)(C6Cl4O2)2] (4) [Fe(L3)(C6Cl4O2)2]CH3CN•CH3OH L1: 2-((E)-(2-(2-aminoethylamino)ethylimino)methyl)phenol L2:(E)-N1-(2-(dimethylamino)ethyl)-N2-((5-methyl-1H-imidazol-4-yl)methylene) ethane-1,2-diamine L3: N,N-diethyl-2-(2-(pyridin-2-yl)imidazolidin-1-yl)ethanamine The methanol solutions of complexes(1)~(4) were titrated with catecholate anions of tetrabromocatechol(TBC), tetrachlorocatechol(TCC), catechol(HC), and 3,5-di-tert-butylcatechol(3,5-DTBC). The results show that the high lewis acidity iron(III) complexes [Fe(L2) 3,5-DTBC] exhibits the higher catechol 1,2-dioxygenase reactivity.
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