O<sub>2</sub>
Activation and Double CH Oxidation by a Mononuclear Manganese(II) Complex
作者:Claire Deville、Sandeep K. Padamati、Jonas Sundberg、Vickie McKee、Wesley R. Browne、Christine J. McKenzie
DOI:10.1002/anie.201508372
日期:2016.1.11
A MnII complex, [Mn(dpeo)2]2+ (dpeo=1,2‐di(pyridin‐2‐yl)ethanone oxime), activates O2, with ensuing stepwise oxidation of the methylene group in the ligands providing an alkoxide and ultimately a ketone group. X‐ray crystal‐structure analysis of an intermediate homoleptic alkoxide MnIII complex shows tridentate binding of the ligand via the two pyridyl groups and the newly installed alkoxide moiety
Mn II络合物[Mn(dpeo)2 ] 2+(dpeo = 1,2-二(吡啶-2-基)乙酮肟)活化O 2,随后逐步将配体中的亚甲基氧化,醇盐,最后是酮基。中间体均相醇盐Mn III配合物的X射线晶体结构分析显示,配体通过两个吡啶基和新安装的醇盐部分进行三齿结合,肟基不再配位。最终酮配体顺-[MnBr 2(hidpe)2的Mn II配合物的结构](hidpe = 2-(羟基亚氨基)-1,2-二(吡啶-2-基)乙酮)表明双齿肟/吡啶配位已经恢复。H 2 18 O和18 O 2标记实验表明,插入的O原子源自两个不同的O 2分子。通过肟单元共振增强的拉曼谱带的变化来监测氧合作用的进程。