A New Tripodal Iron(III) Monophenolate Complex: Effects of Ligand Basicity, Steric Hindrance, and Solvent on Regioselective Extradiol Cleavage
作者:Ramasamy Mayilmurugan、Eringathodi Suresh、Mallayan Palaniandavar
DOI:10.1021/ic700646m
日期:2007.7.1
The new iron(III) complex [Fe(L3)Cl(2)], where H(L3) is the tripodal monophenolate ligand N,N-dimethyl-N'-(pyrid-2-ylmethyl)-N'-(2-hydroxy-3,5-dimethylbenzyl)ethylenediami ne, has been isolated and studied as a structural and functional model for catechol dioxygenase enzymes. The complex possesses a distorted octahedral iron(III) coordination geometry constituted by the phenolate oxygen, pyridine nitrogen
新的铁(III)配合物[Fe(L3)Cl(2)],其中H(L3)是三脚架单酚盐配体N,N-二甲基-N'-(吡啶-2-基甲基)-N'-(2 -羟基-3,5-二甲基苄基)乙二胺已被分离出来,并作为儿茶酚双加氧酶的结构模型和功能模型进行了研究。该配合物具有扭曲的八面体铁(III)配位几何结构,该结构由酚盐氧,吡啶氮和四齿配体的两个胺氮以及两个顺式配位的氯离子组成。Fe-OC键角(134.0度)和Fe-O键长度(1.889埃)非常接近原儿茶酸的Fe-OC键角(Fe-OC,133度和148度,Fe-O(酪氨酸盐),1.81和1.91埃) 3,4-二加氧酶。当用AgNO(3)处理该复合物时,配体到金属的电荷转移(LMCT)带在650 nm左右(ε,2390 M(-1)cm(-1))随吸收率的增加(ε,2630 M(-1)cm(-1))和Fe(III)/ Fe(II)氧化还原红移至665 nm偶极移至稍高的正电位(-0