本文采用CuCl_2和乙二醇双(α-氨基乙基)醚四乙酸在甲醇和水溶液中合成了双核铜配合物,通过元素分析、红外光谱对配合物进行了表征,利用X单晶射线衍射仪测定了其结构.结构解析表明,该标题配合物属三斜晶系,空间群C2/c,晶胞参数a=2.0984(10) nm,b=0.7535(3) nm,c=1.3555(6) nm;α=90 °,β=90.8980(10) °,γ=90 °,V=2.1432(16)nm~3,Z=8,Dc=1.783 g.cm~(-3),F(000)=1184,μ=2.059 mm~(-1),最终偏差因子(对I＞2σ(I)的衍射点),R_1 = 0.0216,wR_2=0.0654,对全部衍射点R_1= 0.0249,wR_2=0.0664.在该配合物中,每个配体分别与两个中心金属离子螯合作用.每个铜离子均采用扭曲的三角双锥结构,分别与配体中的一个N原子,末端两个羧基上的氧原子以及两个水分子配位.
A novel dinuclear Cu~Ⅱ complex 1[Cu_4(L)·2H_2O)] ·2H_2O (H_4L = glycol - bis - (α-aminoethyl) ether N, N, N', N'-Tetraacetic acid) was obtained from self-assembly of CuCl_2·2H_2O with title ligand. The crystallzing sample was characterized by elementary analysis and IR spectrum. Its structure was determined by single crystal X-ray diffraction. The complex shows a dinuclear copper structure, with crystal data:C2/c,a=2.0984(10) nm,b=0.7536(3) nm,c=1.3555(6)nm,α=90 °,β=90.8980(10) °,V=2.1432(16) nm 3,Z=8, R_1 = 0.0216, wR_2 = 0.0654. In title complex, each ligand chelates two different copper atoms. Local coordination geometry around copper atom can be best described as a slightly distorted pentagonal bipyramid, which connected by one N atom, two O atoms from terminal two different carboxylic group and two water molecules.
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