Synthesis and Crystal Structure of Europium(II) Tartrate Tetrahydrate, [Eu(C4H4O6)(H2O)2](H2O)2
作者:Przemyslaw Starynowicz、Gerd Meyer
DOI:10.1002/1521-3749(200012)626:12<2441::aid-zaac2441>3.0.co;2-l
日期:2000.12
Single crystals of [Eu(C4H4O6)(H2O)2](H2O)2 were obtained from the combination of solutions of EuCl2, previously obtained by electrolysis of an aqueous solution of EuCl3, and tartraric acid, neutralized by LiOH. The crystal structure (orthorhombic, P212121, Z = 4, a = 948.9(1), b = 954.6(1), c = 1098.4(1) pm; R(F) = 0.0242 and Rw(F2) = 0.0585 for I > 2σ(I); R(F) = 0.0256 and Rw(F2) = 0.0592 for all
[Eu(C4H4O6)(H2O)2](H2O)2 的单晶是从 EuCl2 溶液的组合中获得的,EuCl2 之前是通过电解 EuCl3 水溶液和酒石酸获得的,用 LiOH 中和。晶体结构(正交,P212121,Z = 4,a = 948.9(1),b = 954.6(1),c = 1098.4(1) pm;R(F) = 0.0242 和 Rw(F2) = 0.0585 for I > 2σ(I);R(F) = 0.0256 和 Rw(F2) = 0.0592(对于所有数据)与 [Ca(C4H4O6)(H2O)2](H2O)2 和 [Sr(C4H4O6)(H2O)2] 同型(H2O)2 表现出三维结构。二价阳离子(Eu2+、Ca2+、Sr2+)是八位氧原子配位的,氧原子源自酒石酸二价阴离子的羧酸根和羟基以及四个水分子中的两个。