A new FeIII(µ-OCH3)2(µ-OAc)FeIII complex containing phenolate and imidazole ligands as a structural model for the active site of non-heme diiron enzymes†
作者:Marciela Scarpellini、Ademir Neves、Adailton João Bortoluzzi、Ivo Vencato、Valderes Drago、Wilson Aires Ortiz、César Zucco
DOI:10.1039/b100913n
日期:——
new tridentate ligand [(2-hydroxybenzyl)(2-(imidazol-2-yl)ethyl)]amine (HBHA) and its first dinuclear FeIII complex have been synthesized. The crystal structures of HBHA and of the complex [Fe2III(BHA)2(μ-OCH3)2(μ-OAc)](ClO4) (1) have been solved by X-ray crystallography. In the cation of complex 1, each BHA− anion is arranged in a facial mode while one acetate and two methoxo groups as bridging ligands
新的三叉戟 配体 [(2-羟基苄基)(2-(咪唑-2-基)乙基)]胺(HBHA)及其首个双核Fe III络合物已经合成。HBHA的和的晶体结构复杂的[Fe 2 III(BHA)2(μ-OCH 3)2(μ-OAC)](CLO 4)(1)已经被解决了X射线晶体学。在里面阳离子的复杂1中,每个BHA -而作为桥接一种乙酸酯和两个methoxo基阴离子被布置在面部模式配体完成Fe III中心的协调范围。Fe III离子被弱反铁磁耦合(J = -10.1 cm -1),并经历归因于Fe 2 III / Fe II Fe III对的准可逆单电子氧化还原过程。配合物1在517nm处也显示出强烈的酚盐至Fe III的电荷转移跃迁(ε = 5560 dm 3 mol -1 cm -1 / Fe 2 III)。莫斯鲍尔光谱115 K处的1的1仅显示一个四极双峰,δ = 0.47和ΔE Q = 0.80