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在水溶液中合成了标题配合物，其化学式为Ｅｒ（Ｍｅｔ）２（ＣｌＯ４）３·４．５Ｈ２Ｏ（Ｍｅｔ为蛋氨酸）．研究了配合物的红外光谱．用Ｘ射线单晶衍射法测定了配合物的晶体结构，结果表明，其结构式为［Ｅｒ２（ＤＬ－Ｍｅｔ）４·８Ｈ２Ｏ］·（ＣｌＯ４）６·Ｈ２Ｏ．属单斜晶系，空间群为Ｐ２１／ｎ，晶胞参数为：ａ＝１３．８４６（５）Ａ，ｂ＝２１．７９４（７）Ａ，Ｃ＝１９．１３１（５），β＝９０．５１（３）°，Ｖ＝５７７２．８４（３）３，Ｚ＝４．每两个Ｅｒ原子之间通过四个蛋氨酸的羧基桥相连而形成双核配合物．两对对位的蛋氨酸中，其中一个为Ｌ型，而另一个为Ｄ型．每个Ｅｒ原子还与四个水分子配位，其配位数为８．对于每个双核离子而言，其配位多面体由两个四方反棱柱体组成．
The title complex was synthesized in aqueous solution with the formula Er (Met) 2 (ClO4) 3 · 4.5H2O (Met is methionine). The infrared spectrum of the complex was studied. The crystal structure of the complex was determined by single crystal X-ray diffraction. The results showed that the crystal structure was [Er2 (DL-Met) 4 · 8H2O] · (ClO4) 6 · H2O. Is a monoclinic system with a space group of P21 / n with unit cell parameters of a = 13.846 (5) A, b = 21.794 (7) A, C = 19.131 (5), β = 90 .51 (3) °, V = 5772.84 (3) 3, Z = 4. Each two Er atoms through the four methionine carboxyl bridge connected to form a dinuclear complex. Two pairs of para-methionine, one of the L-type, and the other for the D-type. Each Er atom is also coordinated with four water molecules with a coordination number of eight. For each binuclear ion, its coordination polyhedron consists of two tetragonal anti-prismatic bodies.