Iron(II) Complexes with Tetradentate Bis(aminophenolate) Ligands: Synthesis and Characterization, Solution Behavior, and Reactivity with O<sub>2</sub>
作者:Christopher J. Whiteoak、Rafael Torres Martin de Rosales、Andrew J. P. White、George J. P. Britovsek
DOI:10.1021/ic1016998
日期:2010.12.6
Tetradentate bis(aminophenolate) ligands H2salanX and H2bapenX (where X refers to the para-phenolate substituent = H, Me, F, Cl) react with [FeN(SiMe3)2}2] to form iron(II) complexes, which in the presence of suitable donor ligands L (L = pyridine or THF) can be isolated as the complexes [Fe(salanX)(L)2] and [Fe(bapenX)(L)2]. In the absence of donor ligands, either mononuclear complexes, for example
四齿双(氨基酚盐)配体H 2 salan X和H 2 bapen X(其中X表示对酚盐取代基= H,Me,F,Cl)与[Fe N(SiMe 3)2 } 2 ]反应形成铁(II)配合物,可以在存在合适的供体配体L(L =吡啶或THF)的情况下分离为配合物[Fe(salan X)(L)2 ]和[Fe(bapen X)(L)2 ]。在没有供体配体的情况下,可以是单核络合物,例如[Fe(salan t Bu,t Bu)],也可以是[Fe(salan)X)] 2。通过VT 1 H和19 F NMR光谱研究了[Fe(salan F)(L)2 ]和[Fe(bapen F)(L)2 ]配合物在溶液中的动态配位行为,揭示了它们之间的平衡。具有不同配体配位拓扑结构的顺式异构体,顺式-α,顺式-β和反式。铁(II)salan X络合物暴露于O 2导致形成[Fe(salan X)} 2(μ-O)]或[Fe(salan)X)(L)}