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合成了锑-镨与乙二胺四乙酸形成的新颖三维配合物[Sb2-μ4-(EDTA)2Pr(H2O)5]NO3·4H2O,用元素分析、红外光谱、热分析及X射线单晶衍射法等进行了组成和结构表征.结果表明该配合物属正交晶系,空间群Pnn2;晶胞参数:a=1.07031(2)nm,b=2.30805(4)nm,c=0.72343(2)nm,V=1.78711(7)nm3,Z=2,Dc=2.202g/cm3,F(000)=1164,μ=2.955mm-1,GOF=1.000,最终偏离因子R1=0.0203,wR2=0.0545[I>2σ(Ⅰ)].在标题化合物中,每个镨(Ⅲ)离子的配位数为9,与五个水分子中的五个氧原子和四个羧基氧原子配位,形成三帽三角棱柱空间配位多面体.锑(Ⅲ)与EDTA离子中的四个氧原子和两个氮原子配位,在赤道平面上有一孤对电子.同时讨论了配合物的热分解过程.
A novel three-dimensional complex [Sb2-μ4- (EDTA) 2Pr (H2O) 5] NO3 · 4H2O formed by the reaction of antimony-praseodymium and ethylenediaminetetraacetic acid was synthesized and characterized by elemental analysis, infrared spectrum, thermal analysis and X-ray single crystal diffraction (2) nm, b = 2.30805 (4) nm, c = 0.72343 (2) The results show that the complex is an orthorhombic and space group Pnn2 with lattice constants of 1.07031 nm, Z = 2, Dc = 2.202g / cm3, F (000) = 1164, μ = 2.955mm-1, GOF = 1.000, final deviation factor R1 = 0.0203, wR2 = 0.0545 [ I> 2σ (I)]. In the title compound, each praseodymium (III) ion has a coordination number of 9 that coordinates with five oxygen atoms and four carboxy oxygen atoms in five water molecules to form three caps The triangular prism spaces coordinate polyhedrons, and antimony (Ⅲ) coordinates with four oxygen atoms and two nitrogen atoms in EDTA ion and has a lone pair of electrons in the equatorial plane. The thermal decomposition process of the complex is also discussed.