The novel 3D edta-linked heterometallic complex [Sb₂Er(edta)₂(H₂O)₄]NO₃·4H₂O (H₄edta = ethylenediaminetetraacetic acid) was synthesized and characterized by elemental analyses, single-crystal X-ray diffraction, powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and thermal analysis. The complex crystallizes in the monoclinic system with space group Pm. In the complex, each erbium(III) ion is connected with antimony(III) ions bridging by four carboxylic oxygen atoms, and in each [Sb(edta)]⁻ anion, the antimony(III) ion is hexacoordinated by two nitrogen atoms and four oxygen atoms from the edta⁴⁻ ions, together with a lone electron pair at the equatorial position. The erbium(III) ion is octacoordinated by four oxygen atoms from four different edta⁴⁻ ions and four oxygen atoms from the coordinated water molecules. The carboxylate bridges between antimony and erbium atoms form a planar array, parallel to the (1 0 0) plane. There is an obvious weak interaction between antimony atom and oxygen atom of the carboxyl group from the adjacent layer. The degradation of the complex proceeds in several steps and the water molecules and ligands are successively emitted, and the residues of the thermal decomposition are antimonous oxide and erbium(III) oxide. The complex was evaluated for its antimicrobial activities by agar diffusion method, and it has good activities against the test bacterial organisms.

中文翻译：

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新型含锑Complex（III）配合物的合成，结构表征和抗菌活性。

合成了新型的3D乙二胺四环杂金属配合物[Sb ₂ Er（edta）₂（H ₂ O）₄ ] NO ₃ ·4H ₂ O（H ₄乙二胺＝乙二胺四乙酸），并通过元素分析，单晶X-射线衍射，粉末X射线衍射（XRD），傅里叶变换红外光谱（FTIR）和热分析。配合物在空间群为Pm的单斜晶系中结晶。在该络合物中，每个（（III）离子与通过四个羧基氧原子桥接的锑（III）离子连接，并且在每个[Sb（edta）] ^-中作为阴离子，锑（III）离子与来自edta ^4-离子的两个氮原子和四个氧原子在赤道位置一起配成六配位。III离子由来自四个不同edta ^4-的四个氧原子组成离子和四个氧原子来自配位的水分子。锑和原子之间的羧酸盐桥形成平行于（1 0 0）平面的平面阵列。锑原子与相邻层羧基的氧原子之间存在明显的弱相互作用。配合物的降解过程分几步进行，水分子和配体依次释放，热分解的残留物为氧化锑和氧化（（III）。通过琼脂扩散法评价该复合物的抗微生物活性，并且对测试细菌具有良好的活性。