【摘要】 标题化合物的分子式为[Eu（NO₃）₆][Eu（NO₃）₂C₁₂H₂₄O₆]₃。晶体属单斜晶系,空间群为C2/m,a=28.772（6）,b=11.142（2）,c=12.024（2）A,β=112.63（2）°,Z=2。对1167个可观察反射（I≥3σ（I））,用块矩阵最小二乘法精修所有的结构参数,最后的一致性因子R=0.063。结构分析表明:晶体学上有三个不同的离子,（1）[Eu（NO₃）₆]^3-,（2）[Eu（NO₃）₂C₁₂H₂₄O₆]⁺（有序）和（3）[Eu（NO₃）₂C₁₂H₂₄O₆]⁺（无序）。前两个离子都具有C_2h对称性。第三个离子是C₁对称性,它有一个无序的冠醚环。在Fourier图上二个冠醚环叠加,它们的相互交错角为32°。更多还原

【Abstract】 The crystal and molecular structure of [Eu（NO₃）₃]₄(C₁₂H₂₄O₆)₃ have been deter- mined from single-crystal x-ray diffraction data. The complex crystallizes in the mono-clinic space group C₂/m with Z=2.Lattice parameters are:a=28.772（6）, b=11.142（2）, c=12.024（2）A, β=112.63（2）°.The structure was solved by Patterson and Fou-rier techniques and refined by least-squares techniques to R=0.063 for 1667 reflec-tions. The structure contains three crystallographically distinct ions in the ratio 1:1:2:（1）[Eu（NO₃）₆]^3- with C_2h symmetry, （2）[Eu（NO₃）₂(C₁₂H₂₄O₆)]⁺ with the samesymmetry, （3）[Eu（NO₃）₂(C₁₂H₂₄O₆)]⁺ with a disordered polyether on a C₁ symmetrysite.The two positions of the disordered polyether are staggered by 32°.更多还原