新型双核Co(Ⅱ)聚合物{Co2L(MeOH)(H2O)4n·nH2O}的合成及其晶体结构

摘要

A novel cobalt (Ⅱ) polymer,[Co2 L (MeOH) (H2 O) 4] n · nH2O (1),was synthesized by the coordination polymerization of cobalt acetate with H4L[1,2,3,4-butane tetracarboxylic acid) by solvothermal method.The structure was characterized by elemental analysis and single crystal X-ray diffraction.1 belongs to monoclinic system,C2/c space group with the a =2.802 6 (3) nm,b =0.81632(11) nm,c=1.6301(2) nm,β=119.793(2)°,V=3.2365(7) nm3,Z=8,Dc=1.925 Mg · cm-3,R1 =0.097 5,wR2 =0.223 1.Adjacent Co(Ⅱ) are bridged by the H4L ligand to construct 1D chain structure,which is extended to 3D framework through the hydrogen bonds.%采用溶剂热法,丁烷四羧酸(H4L)与水合乙酸钴经配位聚合反应合成了一个新型的双核Co(Ⅱ)聚合物[Co2L(MeOH)(H2O)4]n·nH2O(1),其结构经元素分析和单晶X-射线衍射表征.1属单斜晶系,C2/c空间群,晶胞参数a =2.8026(3) nm,b=0.81632(11) nm,c=1.630 1(2) nm,β=119.793(2)°,V=3.236 5(7)nm3,Z=8,Dc=1.925 Mg·cm-3,R1 =0.0975,wR2 =0.2231.1通过H4L桥联形成一维链,通过O-H…O氢键作用形成了无限延伸的二维网络结构；在1中存在的分子内及分子间氢键使1具有三维网络结构.