三维超分子配合物Cu2(C6H4O7)·2H2O的合成及其晶体结构

Synthesis of 3-D Supermolecule Complex Cu_2(C_6H_4O_7)·2H_2O and Its Crystal Structure

通过Cu(NO3)2.6H2O与柠檬酸自装配合成了新颖的三维超分子配合物Cu2L.2H2O(1,L=C6H4O7),其结构经IR,元素分析和X-射线单晶衍射(XRD)表征。XRD研究表明,1含有奇妙的结构,2个Cu与6个L形成变形的八面体,而每个L又与6个不同的Cu配位,整个几何构架为扭曲三角双锥。1属单斜晶系,P21/c空间群,晶胞参数:a=6.920(4),b=9.727(5),c=14.487(8),β=91.308(10),°V=974.82(9)3,Z=4,R1=0.042 5,wR2=0.135 4。

A novel three-dimensional supermolecule complex, Cu2L· 2H2O（1, L = C6H4O7 ）, was prepared by self-assembly of Cu （NO3 ）2·6H2O with citric acid. The structrue was characterized by IR, elemental analysis and X-ray single crystal diffraction（XRD）. 1 revealed from XRD a wonderful structure in which two copper atoms were coordinated by six L to form a anamorphic octahedron, and every L acted as an octadentate ligand linked six different copper atoms. The local coordination geometry around copper atom can be best described as a slightly distorted triangle bipyramid. The crystal of 1 belongs to monoclinic system, space group P21/c with a =6.920（4） A, b =9.727（5） A, c = 14.487（8） A, β=91.308（10）°, V=974.82（9）A^3, Z=4, R1 =0.042 5, wR2 =0.1354.