Novel Iron(III) Complexes of Tripodal and Linear Tetradentate Bis(phenolate) Ligands: Close Relevance to Intradiol-Cleaving Catechol Dioxygenases
作者:Marappan Velusamy、Mallayan Palaniandavar、R. Srinivasa Gopalan、G. U. Kulkarni
DOI:10.1021/ic020569w
日期:2003.12.1
proteins. Complex 1 contains an FeN2O2Cl chromophore with a novel trigonal bipyramidal coordination geometry. While two phenolate oxygens and an amine nitrogen constitute the trigonal plane, the other amine nitrogen and chloride ion are located in the axial positions. In contrast, 2 exhibits a rhombically distorted octahedral coordination geometry for the FeN2O3Cl chromophore. Two phenolate oxygen atoms
双酚盐配体N,N-二甲基-N',N'-双(2-羟基-3,5-二甲基苄基)乙二胺[H2(L1)],N,N-的四个新的铁(III)配合物二甲基-N',N'-双(2-羟基-4-硝基苄基)乙二胺[H2(L2)],N,N'-二甲基-N,N'-双(2-羟基-3,5-二甲基苄基)乙二胺[H2(L3)]和N,N'-二甲基-N,N'-双(2-羟基-4-硝基苄基)乙二胺[H2(L4)]已被分离并作为结构模型和功能模型进行了研究内二醇裂解邻苯二酚1,2-二加氧酶(CTD)。配合物[Fe(L1)Cl](1),[Fe(L2)(H2O)Cl](2),[Fe(L3)Cl](3)和[Fe(L4)(H2O)Cl]( 4)已使用吸收光谱和电化学技术进行了表征。已成功确定了配体H2(L1)以及配合物1和2的单晶X射线结构。包含N2O2供体组的三脚架配体H2(L1)代表铁蛋白的金属结合区。配合物1包含FeN2O2Cl发色团,具有