1,2,4,5-均苯四甲酸铜配位化合物的合成及晶体结构

Syntheses and Crystal Structures of Cu (Ⅱ) Complex Formed through l,2,4,5-Benzenetetracarboxylic Acid

采用水热合成法,利用均苯四甲酸为桥联配体得到两种新型配位化合物[Cu2(BTEC)·(H2O)6]·2H2O(1)和[Cu(BTEC)1/2·(H2O)5](2)[H4BTEC=1,2,4,5-均苯四甲酸],并通过X-射线单晶衍射分析对产物进行了表征。研究表明,配合物1中心铜离子为六配位的八面体结构,并通过羧酸和铜的连接构成1D的链状结构,再通过氢键O-H…O构筑成2D网络结构。配合物2中心铜离子也为六配位的八面体结构,在配合物2中包含一个10.918×10.9182的2D菱形拓扑网络结构。

Two new coordination compounds, [Cu2（BTEC）·（H2O）6]·2H2O（1） and [cu（BTEC）1/2：·（H2O）5]（2）, have been synthesized through hydrothermal synthesis method with H4BTEC [H4BTEC = 1,2,4,5-benzenetetracarbox-ylic acid], and structurally characterized by single-crystal X-ray diffraction. The research result showes that the structure of the compound 1 exhibits octahedral coordination, and 1 D chain formed through BTEC and copper （II） ions. Besides, a structural feature of the compound 1 is that one 2D networks running along hydrogen bonding O-H…O in the crystal. In compound 2, the copper （II） ion is six-coordinated with distorted octahedral coordination geometry. This arrangement gives rise to a connecting 2D diamond topologic grid sheet with large rings of 10. 918 × 10. 918A in diagonal distances.