Chiral 1,8-naphthyridine based ligands: Syntheses and characterization of Di- and tetranuclear copper (I) and silver (I) complexes
作者:Mithun Sarkar、Pragati Pandey、Jitendra K. Bera
DOI:10.1016/j.ica.2018.11.014
日期:2019.2
scaffold to access chiral ligands L1, L2 and L3. Metalation of these chiral ligands with Cu(I) and Ag(I) precursors afforded di- and tetranuclear complexes [Cu4I4(L1)2] (1), [Cu4I4(L2)2] (2), [Cu2I2(L3)] (3), [Cu2I(L2)2](OTf) (4), [Ag2(L1)2](OTf)2 (5) and [Ag4(L2)4Br](OTf)3 (6), containing [M4Xn] (n = 1,4 and X = Br, I) or [M2Xn] (n = 0, 1, 2 and X = I) core. All complexes are structurally characterized
摘要在1,8-萘啶骨架上引入了恶唑啉和樟脑-吡唑单元,以访问手性配体L1,L2和L3。这些手性配体与Cu(I)和Ag(I)前体的金属化提供了双核和四核配合物[Cu4I4(L1)2](1),[Cu4I4(L2)2](2),[Cu2I2(L3)] (3),[Cu2I(L2)2](OTf)(4),[Ag2(L1)2](OTf)2(5)和[Ag4(L2)4Br](OTf)3(6),含有[ M4Xn](n = 1,4和X = Br,I)或[M2Xn](n = 0、1、2和X = I)磁芯。所有复合物均具有结构特征。萘啶衍生的配体揭示了桥螯合物配位基序,并保持两个金属中心非常接近。四核配合物是由卤化物桥接的双核配合物的二聚体。报道了铜络合物的电子吸收和发射光谱。检查了所有配合物的催化效用是否不对称转化,但它们显示出较差的活性,这可能是由于金属中心的溶解度有限和配位饱和所致。用[L3 / Cu盐]组合以