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由二氧化锗与丙二胺四乙酸（Ｈ_４ｐｄｔａ）和二乙三胺五乙酸（Ｈ_５ｄｔｐａ）直接制备［Ｇｅ－（ＯＨ）（Ｈｐｔｄａ）］（Ⅰ）和［Ｇｅ（ＯＨ）（Ｈ_２ｄｔｐａ）］·Ｈ_２Ｏ（Ⅱ）。Ｘ－射线单晶结构分析证明，在这两个螯合物中，与Ｇｅ（Ⅳ）螯合的氨基多羧酸均呈五齿，由ＯＨ－占据畸变八面体的第六个配位位置。未参与配位的一个羧基形成分子间氢键，而在（Ⅱ）中还有一个自由羧基形成内盐，并与水分子共同形成分子内氢键。晶体参数：［Ｇｅ（ＯＨ）（Ｈｎｄｔａ）］（Ⅰ），Ｍ_γ＝３９２．８５，正交晶系，空间群Ｐｃａ２_１，ａ＝１５．２４８（２），ｂ＝７．０２９（２），ｃ＝１３．３８４（２），Ｖ＝１４３４．５，Ｚ＝４，Ｄ_ｃ＝１．８１９ｇ／ｃｍ~３，μ（ＭｏＫａ）＝２１．５５ｃｍ~（－１），Ｆ（０００）＝８００．用１１７２个Ｉ＞３σ（Ｉ）的独立衍射精修结构，最终偏差因子Ｒ＝０．０３３；［Ｇｅ（ＵＨ）（Ｈ_２ｄｔｐａ）］·Ｈ_２Ｏ（Ⅱ），Ｍ_γ＝４９７．９４，三斜晶系，空间群Ｐ１，ａ＝７．２３１（２），ｂ＝１０．４０７（１），ｃ＝１３．２８６（２），α＝７４．４２（１），β＝７５．３０（１），γ＝８８．１５（１）°，Ｖ＝９３０．９，Ｚ＝２，Ｄ_ｃ＝１
[Ge- (OH) (Hptda)] (I) and [Ge (OH) (H 2dtpa)] · H 2 O were directly prepared from germanium dioxide with propylenediaminetetraacetic acid (H_4pdta) and diethylenetriaminepentaacetic acid (H_5dtpa) (Ⅱ). X-ray single crystal structure analysis confirmed that in both chelates, the polycarboxylic acids chelated with Ge (IV) were all pentagonal, occupying the sixth coordination site of the distorted octahedron by OH-. A carboxyl group that is not involved in coordination forms an intermolecular hydrogen bond, whereas a free carboxyl group in (II) forms an internal salt and co-forms an intramolecular hydrogen bond with the water molecule. Crystal parameters: [Ge (OH) (Hndta)] (I), M_γ = 392.85, orthorhombic, space group Pca2_1, a = 15.248 (2), b = 7.029 = 13.384 (2), V = 1434.5, Z = 4, D_c = 1.819 g / cm ~ 3, μ (MoKa) = 21.55 cm -1, and F (000) = 800. The results showed that the final deviation factor was R = 0.033 with 1172 independent diffraction refinements of I> 3σ (I); [Ge (UH) (H 2dtpa)] · H 2 O (Ⅱ), M_γ = 497.94, triclinic A = 7.231 (2), b = 10.407 (1), c = 13.286 (2), α = 74.42 (1), β = 75.30 γ = 88.15 (1) °, V = 930.9, Z = 2, D_c = 1