A Novel Pentadentate Redox-Active Ligand and Its Iron(III) Complexes: Electronic Structures and O<sub>2</sub>Reactivity
作者:Ramona Metzinger、Serhiy Demeshko、Christian Limberg
DOI:10.1002/chem.201304535
日期:2014.4.14
potentially pentadentate with an O,N,S,N,O donor set is described. Treatment of 1 with two equivalents of potassium hydride gave access to octametallic precursor complex [H2Ph2SLAPK2(thf)]4 (2), which reacted with FeCl3 to yield iron(III) complex [H2Ph2SLAPFeCl] (3). Employing Fe[N(SiMe3)2]3 for a direct reaction with 1 led to ligand rearrangement through CS bond cleavage and thiolate formation, finally
描述了一种新颖的氧化还原活性配体H 4 Ph2S L AP(1),该配体被设计为可能与O,N,S,N,O供体结合。用两当量的氢化钾处理1可获得八金属前体络合物[H 2 Ph2S L AP K 2(thf)] 4(2),后者与FeCl 3反应生成铁(III)络合物[H 2 Ph2S L AP FeCl](3)。使用Fe [N(SiMe 3)2 ] 3与1通过CS键断裂和硫醇盐形成导致配体重排,最终产生[HL AP Fe](5)。暴露于O 2时,3和5会通过从配体NH单元中脱氢而被正式氢原子氧化,形成[ Ph2S L SQ FeCl](4)和[L SQ Fe](6),具有两个或一个配位的亚氨基半醌部分,分别。Mössbauer的测量表明,铁心保持在+ III氧化态。化合物3和5就其作为儿茶酚双加氧酶模型的潜力进行了测试。因此,他们接受了3,5-二叔丁基邻苯二酚,三乙胺和O 2的处理。结果表明