铜与三乙四胺六乙酸配合物［Cu_2（H_2TTHA）（H_2O）_2］·6H_2

SYNTHESIS AND CRYSTAL STRUCTURE OF COPPER COMPLEX OF TRIETHYLENE TETRAAMINE IIEXAACETIC ACID [Cu_2(H_2TTHA)(H_2O)_2]·6H_2O

首次在水溶液中合成了三乙四胺六乙酸铜配合物单晶，元素分析结果表明可用Ｃｕ２（Ｈ２ＴＴＨＡ）·８Ｈ２Ｏ表示．用Ｘ射线衍射方法测定了该单晶结构，其结构式为［Ｃｕ２（Ｈ２ＴＴＨＡ）（Ｈ２Ｏ）２］·６Ｈ２Ｏ．晶体属单斜晶系．空间群为，每一晶胞中有２个配合物单元，形成二核配合物．晶胞参数如下：ａ＝０．７１６２（４），ｂ＝１．３０７７（８），ｃ＝１．５８３９（９）ｎｍ；β＝９１．６６（５）°，Ｚ＝２，ｖ＝１．４８３（２）ｎｍ３，ｄｃａｌｃ＝１．７０６ｇ／ｃｍ３．配合物铜的配位数为５，构型为四方锥配位多面体．

The complex,[Cu2(H2TTHA)(H2O)2].6H2O has been synthesized in aqueous solution,where H6TTHA =triethylene tetraamine hexaacehc acid. Its crystal smicture has been determined with a fou-circle X-ray diffractometer to a final R value of 0.0654. The crystal ismonoclinic with space group The cell parameters ars as follows:a=0.7162(4),b= 1.3077(8),c= 1 .5839(9)nm; P= 91 .66(5)°,v=2, v=1.483(2)nm,dcalc. = 1 .7069 / cm3.In the crystal Cu(Ⅱ) ion is seven coordinated to form a squre pyramid