Double U(VI) phthalates with NH 4 + , K+, and Cs+ ions in the outer sphere were synthesized. The X-ray phase analysis shows that their structures are similar. Single crystals were prepared and the structure of K4[(UO2)4(μ3-O)2(C6H4C2O4)4] ⋅ 3H2O was solved. In the [(UO2)4O2(C6H4C2O4)4]4− anions forming the main structural motif, each bridging oxygen atom μ3-O combines one pentagonal and two hexagonal bipyramids, which, in turn, are combined in centrosymmetrical tetramers. The phthalate ions have coordination capacity equal to 3; each ligand coordinates U(1) in the bidentate fashion via one carboxy group and U(2) in the bidentate fashion to form a planar seven-membered chelate ring.
合成了外层具有NH 4 + 、K+ 和Cs+ 离子的双U(VI)
邻苯二甲酸酯。 X射线物相分析表明它们的结构相似。制备了单晶并解析了K4[(UO2)4(μ3-O)2(C6H4C2O4)4]·3H2O的结构。在形成主要结构基序的[(UO2)4O2(C6H4C2O4)4]4−阴离子中,每个桥接氧原子μ3-O结合一个五角形和两个六角形双锥体,这些双锥体又结合成中心对称四聚体。
邻苯二甲酸根离子的配位能力等于3;每个
配体通过一个羧基以二齿形式配位U(1),并以二齿形式配位U(2)以形成平面七元螯合环。