H2O2. In the presence of excess phen, no phen-releasing equilibria from , and exist. Kinetic evidence of the generation of a (micro-1,2 peroxo)diiron(III,III) intermediate, prior to electron transfer, were obtained. Significant rate retardation in D2O media suggests proton coupled electron transfer (PCET) in the rate determining step of the title redox reaction.
核糖核苷酸还原酶和甲基半胱
氨酸中的双核
铁位点的新型拉曼光谱模型,[Fe2(micro-O)(phen)4(
H2O)2] 4+,1,(phen = 1,10-phenothroline)定量氧化通过内球电子转移途径将
过氧化氢转化为双氧。尽管1去质子化形成[Fe2(micro-O)(phen)4( )(OH)] 3+(2)和[Fe2(micro-O)(phen)4(OH)2] 2+(3)在
水性介质中,2和3都不具有氧化 2的活性。在存在过量的phen的情况下,和都不存在phen释放平衡。获得了在电子转移之前生成(micro-1,2 peroxo)diiron(III,III)中间体的动力学证据。D2O介质中的显着速率延迟表明在标题氧化还原反应的速率确定步骤中质子耦合电子转移(PCET)。