4,6-二氨基-5-醛基嘧啶与间苯二甲酸为共配位的金属镉(Ⅱ)配合物的合成

Synthesis of a novel 4,6-diamino-5-carbaldehydepyrimidine and isophthalic acid-based Cd(Ⅱ)complex

采用水热合成法制备了基于4,6-二氨基-5-醛基嘧啶(dcp)和间苯二甲酸(H2ip)的镉(Ⅱ)配合物{[Cd(dcp)(ip)(H2O)2]·H2O}n,通过单晶和粉末X-线衍射、元素分析、红外光谱、热重分析对其结构和热稳定性进行了表征.配合物结晶于三斜的Pī空间群,a=0. 674 59(7)nm,b=1.007 41(11)nm,c=1.189 01(12)nm,β=100.923(2),V=0.790 73(14)nm3,Z=2.相邻的镉(Ⅱ)中心通过2个间苯二甲酸二价阴离子采取μ3-桥联模式形成一维链状结构,通过8种分子间氢键,配合物从一维链状结构拓展为三维超分子结构.热重分析表明,该配合物具有较好的热稳定性.

A novel 4,6-diamino-5-carbaldehydepyrimidine(dcp)and isophthalic acid(H2ip)-based Cd(Ⅱ)complex{[Cd(dcp)(ip)(H2O)2]·(H2O}n was synthesized,and its structure and thermal stability were characterized by single-crystal and powder X-ray diffraction,elemental analysis,FI-IR spectrum,thermogravimetric analysis.The complex crystallizes in the triclinic Pīspace group with a=0.674 59(7)nm,b=1.007 41(11)nm,c=1.189 01(12)nm,β=100.923(2),V=0.790 73(14)nm3,Z=2.The adjacent Cd(Ⅱ)centers are bridged by two isophthalic divalent anions to form a 1D chain structure.The complex extends from 1D chain structure to 3D supramolecular structure through eight kinds of intermolecular hydrogen bonds.The thermogravimetric analysis showed that the complex had good thermal stability.