Iron(III) complexes of pyridine-based tetradentate aminophenol ligands as structural model complexes for the catechol-bound intermediate of catechol dioxygenases

详细信息    查看全文

• 作者：Sima Heidari^a ; Elham Safaei^a ; ^{safaei@iasbs.ac.ir} ; Andrzej Wojtczak^b ; Patricia Coti?^c ; Anna Kozakiewicz^b
• 关键词：Aminophenol ; Substrate adducts models ; Catechol dioxygenases ; Iron complexes
• 刊名：Polyhedron
• 出版年：2013
• 出版时间：17 May, 2013
• 年：2013
• 卷：55
• 期：Complete
• 页码：109-116
• 全文大小：1342 K

文摘

Some pyridine-based tetradentate aminophenol ligands and their acetylacetonato iron(III) LFe(acac) complexes have been synthesized and characterized by spectroscopic techniques, cyclic voltammetry, single crystal X-ray diffraction and magnetic susceptibility studies. X-ray analysis revealed monomer complexes in which the iron centers have been surrounded by pairs of acetyl acetonate and phenolate oxygens and two nitrogen atoms of the ligands. It has been shown that the two Fe-O_acac bonds in these complexes are not equal, as seen for Fe-O_cat bonds in the catechol-bounded intermediate of catechol dioxygenases. Variable temperature magnetic susceptibility indicates a paramagnetic behavior for all the mononuclear high spin iron complexes. The investigated complexes undergo electrochemical oxidation and reduction.