Iron(III) complexes of tridentate N3 ligands as models for catechol dioxygenases: Stereoelectronic effects of pyrazole coordination
作者:Karuppasamy Sundaravel、Eringathodi Suresh、Mallayan Palaniandavar
DOI:10.1016/j.ica.2010.04.025
日期:2010.10
characterized by elemental analysis and spectral and electrochemical methods. The X-ray crystal structure of the complex [Fe(L1)Cl 3 ] 1 has been successfully determined. The complex possesses a distorted octahedral coordination geometry in which the tridentate ligand facially engages iron(III) and the Cl − ions occupy the remaining coordination sites. The Fe–N pz bond distance (2.126(5) A) is shorter than
摘要三齿N 3配体的铁(III)配合物吡唑-1-基甲基(吡啶-2-基甲基)胺(L1),3,5-二甲基吡唑-1-基甲基(吡啶-2-基甲基)胺(L2)分离并研究了3-异丙基吡唑-1-基甲基(吡啶-2-基甲基)胺(L3)和(1-甲基-1 H-咪唑-2-基甲基)吡啶-2-基甲基胺(L4)儿茶酚双加氧酶的功能模型。它们已通过元素分析,光谱和电化学方法进行了表征。复合物[Fe(L1)Cl 3] 1的X射线晶体结构已成功确定。该络合物具有扭曲的八面体配位几何形状,其中三齿配体面与铁(III)结合,而Cl-离子占据其余的配位位点。Fe–N pz键距(2.126(5)A)短于Fe–N py键(2.199(5)A)。配体供体取代基的系统变化显着影响铁(III)中心的路易斯酸度,因此影响本发明配合物与一系列邻苯二酚的相互作用。儿茶酚加合物[Fe(L)(DBC)Cl],其中H 2 DBC = 3,5-二叔丁基邻苯