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将适量的苯六羧酸和La(NO3)3.nH2O在水中混合,在50 oC下析出[La2(C6(COO)6)(H2O)8].2H2O晶体.单晶X-射线衍射分析表明,晶体属于单斜晶系,P21/n(No.14)空间群,晶胞参数:a=0.866 5(2)nm,b=1.326 1(3)nm,c=0.969 1(2)nm,β=96.16(3),V=1.107 1(4)nm3,Dc=2.382g/cm3,Z=2,F(000)=7 642 544个独立衍射点中,2 344个可观测点满足F0 2≥2σ(F02),R1=0.0220,wR2=0.054 4.标题配合物中中心原子La和9个氧原子配位,形成畸变的三帽三方棱柱的配位多面体,每个苯六羧酸根桥联6个La原子,通过这种桥联作用形成具有三维网络结构的配位聚合物.
The appropriate amount of benzene hexacarboxylic acid and La (NO3) 3.nH2O were mixed in water, [La2 (C6 (COO) 6) (H2O) 8] .2H2O crystals were precipitated at 50 o C. Single crystal X-ray diffraction analysis , The crystal belongs to monoclinic space group P21 / n (No.14) with unit cell parameters of a = 0.866 5 (2) nm, b = 1.326 1 (3) nm and c = 0.969 1 2 344 observable points out of 7 642 544 independent diffraction points satisfying F 0 2 (β = 96.16 (3), V = 1.107 1 (4) nm 3, Dc = 2.382 g / cm 3, Z = 2, F (000) ≥2σ (F02), R1 = 0.0220, wR2 = 0.054 4. In the title complex, the central atom La coordinates with nine oxygen atoms to form a distorted trinuclear prismatic coordination polyhedron. Each benzene hexacarboxylate is bridged 6 La atoms, through this bridging effect to form a three-dimensional network structure of the coordination polymer.