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本文报导了〔Ｈ６ｅｄｔａ〕〔ＶⅢ（ｅｄｔａ）（Ｈ２Ｏ）〕２·４Ｈ２Ｏ（ｅｄｔａ４－＝乙二氨基四乙酸根）配合物的合成及它的分子结构和晶体结构的测定．得出的具体分析结果如下：三斜晶系，Ｐ１—空间群，ａ＝７．７２４（５），ｂ＝１２．０９２（４），ｃ＝１２．６２２（４），α＝７２．７９（３）°，β＝８１．７９（４）°，γ＝７３．８０（４）°，Ｖ＝１０７９．１（８）３，单位晶胞中的分子数为１，Ｄｃ＝１．７４ｇ·ｃｍ－３，Ｄｏ＝１．７２ｇ·ｃｍ－３，μ＝０．５９５ｍｍ－１，Ｆ（０００）＝５３９，在３°≤２θ≤５５°的范围内共收集４２６８个衍射数据，对２２３８个独立衍射点，它的Ｒ和Ｒｗ值分别为０．０４８和０．０２９．其中〔ＶⅢ（ｅｄｔａ）（Ｈ２Ｏ）〕－是一个七配位的近似面冠三方柱（Ｃ２ｖ－ＭＴＰ）体结构．由此可知具有非对称电子结构（ｄ２）的ＶⅢ六齿配体的ｅｄｔａ４－（＝乙二胺四乙酸根）和作为第七个配体的水分子易形成七配位结构的配合物．
This paper reports the synthesis of [H6edta] [VIII (edta) (H2O)] 2 · 4H2O (edta4- = ethylenediaminetetraacetate) complex and its molecular structure and crystal structure. The specific analysis results obtained are as follows: triclinic, P1-space group, a = 7.724 (5) , b = 12.092 (4) , c = 12.622 72.79 (3) °, β = 81.79 (4) °, γ = 73.80 (4) °, V = 1079.1 (8) 3 and the number of molecules per unit cell is 1. Dc = 1.74g · cm-3, Do = 1.72g · cm-3, μ = 0.595mm-1, F (000) = 539, and a total of 4268 diffractions were collected in the range of 3 ° ≦ 2θ ≦ 55 ° For the 2238 individual diffraction points, its R and Rw values are 0.048 and 0.029, respectively. Among them, [VIII (edta) (H2O)] - is a seven-coordinated near-surface crown-capped cubic (C2v-MTP) structure. It can be seen from this that edta4 - (= ethylenediaminetetraacetate) of the VI hexagonal ligand of the asymmetric electronic structure (d2) and the water molecule as the seventh ligand easily form a complex of hepta coordinate structures.