Bis(tetraphenylantimony) malonate was synthesized by the reaction of tetraphenylantimony bromide with silver malonate (the molar ratio was 2:1) in toluene. According to the X-ray diffraction data, the tridentate carboxylate ligand is a chelate. The coordination number of the Sb(1) atom involved in a contact with the carbonyl oxygen atom increases to six (Sb(1)—O(1), 2.199(7) Å; Sb(1)—O(3), 2.362(7) Å). Another antimony atom remains five-coordinate (Sb(2)—O(4), 2.304(7) Å). The antimony atoms Sb(1) and Sb(2) have distorted octahedral and trigonal-bipyramidal coordination geometry, respectively.

中文翻译：

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双(四苯基锑)丙二酸的合成与结构

双（四苯基锑）丙二酸是由四苯基溴化锑与丙二酸银（摩尔比为2：1）在甲苯中反应合成的。根据 X 射线衍射数据，三齿羧酸盐配体是螯合物。参与与羰基氧原子接触的 Sb(1) 原子的配位数增加到 6 (Sb(1)-O(1), 2.199(7) Å; Sb(1)-O(3), 2.362 (7) Å)。另一个锑原子保持五配位 (Sb(2)-O(4), 2.304(7) Å)。锑原子 Sb(1) 和 Sb(2) 分别具有扭曲的八面体和三角-双锥体配位几何结构。