基于3,5-二(3-吡啶)-4-氨基-1,2,4-三唑配体的Co(Ⅱ)和Cu(Ⅱ)配合物的合成与晶体结构

摘要

Two new metal complexes of {[CoL(H2O)4]SO4 ·H2O}n (1) and [Cu(hfac)2L2] (2,hfac =hexafluoroacetylacetonate) based on 3,5-bis(3-pyridyl)-4-amino-1,2,4-triazole (L) have been synthesized and characterized by infrared spectrum (IR),elemental analysis (EA),and X-ray single crystal diffraction.For 1,ligand L adopts a cisconformation and acts as a bidentate spacer to bind Co(Ⅱ) centers to form a one-dimensional (1D) sinusoidal chain.These sinusoidal chains are linked with each other and give a three-dimensional (3D) framework through O-H…O and O-H…N hydrogen bonds of neighboring chains.H2O guest molecules and SO42-anions are bound on the framework through hydrogen bonding system.For 2,while the ligand L also adopts a cis-conformation,it acts as a monodentate spacer to bind Cu(Ⅱ) centers to form a discrete mononuclear complex,which is also linked into a three-dimensional (3D) framework through hydrogen bonds.%利用3,5-二(3-吡啶)-4-氨基-1,2,4-三唑(L)配体与Co(Ⅱ)/Cu(Ⅱ)盐室温下反应得到了一维的配位聚合物{[CoL(H2O)4]SO4·H2O}n(1)和单核配合物[Cu(hfac)2L](2,hfac=hexafluoroacetylacetonate).通过红外、元素分析及X射线单晶衍射等检测手段对所合成的配合物进行了表征.结构研究表明,配合物1中,配体L呈顺式构型,采取双齿配位方式桥联Co(Ⅱ)离子形成一维正弦链状结构,一维链通过多种氢键相互作用连接进一步形成三维网状结构;溶剂水分子和硫酸根阴离子通过氢键连接在框架上.配合物2中,配体L则采取单齿配位方式,与Cu(Ⅱ)离子形成离散型的单核结构,通过多重氢键作用进而连接成三维网状结构.