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La(NO_3)_5[La(NO_3)_2C_(20)H_(36)O_6]_2和Pr(NO_3)5[Pr(NO_3)_2C_(20)H_(36)O_63]_2两个晶体都属三斜晶系,P■空间群.a=11.950(2)[11.836(5)]~*■,b=13.784(2)[13.694(4)]■,c=20.820(5)[20.742(6)]■,α=103.29(2)[103.50(2)]°,β=106.01(2)[106.14(3)]°,γ=97.30(1)[97.22(3)]°,Z=2.对9416[8655]个独立的可观测反射,经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=0.0496[0.0788],R_w=0.0431[0.0720].经差值Fourier图确定的氢原子表明,络合物分子中的二环己基-18-冠-6属异构体B型.结构分析指出:络合物Ln(NO_3)_5[Ln(NO_3)_2C_(20)H_(36)O_6]_2,Ln-La和Ln-Pr是同构的.晶体学上,它们有两个络离子:(Ⅰ)[Ln(NO_3)_2C_(20)H_(36)O_6]~+和(Ⅱ)[C_(20)H_(36)O_6Ln(NO_3)-Ln(NO_3)_(25)]~-.
Both La (NO_3) _5 [La (NO_3) _2C_ (20) H_ (36) O_6] _2 and Pr (NO_3) 5 [Pr (NO_3) _2C_ (20) H_ (36) O_63] _2 belong to triclinic (5) [20.742 (6)], c = 20.820 (5) [20.742 (2) , Α = 103.29 (2) [103.50 (2)] °, β = 106.01 (2) [106.14 (3)] °, γ = 97.30 (1) [97.22 (3)] °, Z = [8655] Independent observable reflections, all structural parameters refined by block matrix least-squares method with final concordance factor R = 0.0496 [0.0788], Rw = 0.0431 [0.0720]. The hydrogen Atomic indicates that the dicyclohexyl-18-crown-6 isomer B in the complex molecule structure analysis shows that the complex Ln (NO_3) _5 [Ln (NO_3) _2C_ (20) H_ (36) O_6] _2, Ln-La and Ln-Pr are isomorphic. They crystallographically have two complex ions: (I) [Ln (NO_3) _2C_ (20) H_ (36) O_6] ) [C_ (20) H_ (36) O_6Ln (NO_3) -Ln (NO_3) _ (25)] -.