Hybrid NS ligands supported Cu(i)/(ii) complexes for azide–alkyne cycloaddition reactions
作者:Shi-Qiang Bai、Lu Jiang、Jing-Lin Zuo、T. S. Andy Hor
DOI:10.1039/c3dt50247c
日期:——
Three copper complexes of nitrogenâsulfur donor ligands, [CuBr2(L1)] (1), [CuCl2(L2)2] (2) and [Cu2I2(L3)]n (3) (L1 = bis(2-cyclohexylsulfanylethyl)amine, L2 = 2-(benzylsulfanylmethyl)pyridine and L3 = 2-(4-pyridylsulfanylmethyl)pyridine), have been synthesized and characterized by single-crystal X-ray diffraction (XRD), powder XRD and TGA analysis. Complexes 1 and 2 are mononuclear Cu(II) complexes and are EPR active with distorted square-pyramidal and octahedral geometry, respectively. Complex 3 is a two-dimensional tetrahedral Cu(I) coordination polymer with 16- and 20-membered metallocycles. These complexes show good catalytic activities for one-pot azideâalkyne cycloaddition reactions in CH3OHâH2O.
三种氮硫供体配体的铜配合物,[CuBr2(L1)] (1),[CuCl2(L2)2] (2) 和 [Cu2I2(L3)]n (3) (L1 = 双(2-环己硫基乙基)胺,L2 = 2-(苄硫基甲基)吡啶,L3 = 2-(4-吡啶硫基甲基)吡啶),已通过单晶X射线衍射(XRD)、粉末XRD和TGA分析合成并表征。配合物1和2是单核Cu(II)配合物,并且分别具有扭曲的四角锥体和八面体几何结构,是EPR活性物质。配合物3是具有16和20元金属环的二维四面体Cu(I)配位聚合物。这些配合物在CH3OH-H2O中的一锅叠氮-炔烃环加成反应中显示出良好的催化活性。