Biomimetic Interaction between Fe<sup>II</sup>and O<sub>2</sub>: Effect of the Second Coordination Sphere on O<sub>2</sub>Binding to Fe<sup>II</sup>Complexes: Evidence of Coordination at the Metal Centre by a Dissociative Mechanism in the Formation of μ-Oxo Diferric Complexes
作者:Amadou Wane、Nasser K. Thallaj、Dominique Mandon
DOI:10.1002/chem.200901350
日期:2009.10.12
that the formation of μ‐oxo diferric compounds from O2 and FeCl2 complexes within the tris(2‐pyridylmethyl)amine series (N. K. Thallaj et al. Chem. Eur. J., 2008, 14, 6742–6753) involves coordination of O2 to the metal centre and that this reaction occurs following initial dissociation of the bound equatorial chloride anion. We also report evidence of the formation of a reduced form of dioxygen by an
我们报告的形成μ氧代二铁化合物选自O 2和的FeCl 2复合物中的三(2-吡啶基甲基)胺系列(N. K. Thallaj等内化学式欧洲药典J.,2008,14,6742-6753)涉及O 2配位到金属中心,并且该反应在结合的赤道氯离子开始解离后发生。我们还报告了通过内球机理形成还原形式的双氧的证据,从而导致配体的修饰。[FeCl 2 L]配合物的固态结构(L 1 =单(α-新戊酰胺基吡啶基甲基)双(2-吡啶基甲基)胺,L 2=单(α-新戊酸酯基吡啶基甲基)双(2-吡啶基甲基)胺,L 3描述了双(α-新戊酰胺基吡啶基甲基)单(2-吡啶基甲基)胺,并且光谱数据支持溶液中的结构保留。在[FeCl 2 L 3 ]中,两个酰胺氢原子稳定赤道氯化物阴离子,使得不可能通过弱配体进行交换:[FeCl 2 L 3 ]完全是氧稳定的。在[FeCl 2 L 2 ]中,赤道氯化物阴离子完全自由移动并且可以发生O 2的配位。与[FeCl