4-羧基苯氧乙酸铜配合物[Cu(CBOAH)2(H2O)2]的合成与晶体结构

合成了4-羧基苯氧乙酸铜配合物Cu(CBOAH)2(H2O)2](CBOAH-为4-羧基苯氧乙酸根阴离子), 对其进行了IR、TG和单晶X-射线衍射等表征。晶体C18H18CuO12 属单斜晶系, 空间群C2/c, 晶胞参数a = 12.298(3), b = 7.380(1), c = 21.413(4) ? ?= 94.00(3), V = 1938.8(7) , Mr = 489.88, Z = 4, Dc = 1.678 g/cm3, ?= 1.194 mm-1, F(000) = 1004, 最终R = 0.0279, wR = 0.0535。2个不同配体的氧乙酸上的羧基氧原子和醚氧原子与铜原子配位, 并形成赤道平面, 2个轴向位置分别被2个水分子所占据, Cu(Ⅱ)离子具有八面体配位构型。热分析结果表明在220℃前配合物是稳定的。

Synthesis and Crystal Structure of Complex[Cu(CPOAH)2(H2O)2] with 4-Carboxyphenoxyacetate Ligand

The novel complex Cu(CPOAH)2(H2O)2] (CPOAH- = 4-carboxylphenoxyacetate) has been synthe- sized and characterized by IR, TG and single-crystal X-ray diffraction. It is of monoclinic, space group C2/c with a = 12.298(3), b = 7.380(2), c = 21.413(4) ? ?= 94.00(3), V = 1938.8(7) , Z = 4, Dc = 1.678 g/cm3, ?= 1.194 mm-1, F(000) = 1004, the final R = 0.0279 and wR = 0.0535. Two carboxylate oxygen and two ether oxygen atoms of different oxoaxetate ligands are coordinated to the copper atom, forming an equatorial plane. The copper atom adopts an approximate octahedral geometry, while two water molecules in the complex occupy two axial positions. The crystal network is formed by intermolecular hydrogen bonds. The results of TG analysis show that the title complex is stable under 220 ℃.