CRYSTAL STRUCTURE OF NEODYMIUM（Ⅲ）COMPLEX WITH1，2，4—BENZENETRICARBOXYLIC ACID

<正> [NdC6H3(COO)3(H2O)3]·H2O, Mr=423. 45, orthorhombic,space groupP212121,a=6. 120(3) ,b=9. 719(2) ,c=20. 133(8) A ,V=1197. 5A3.Z = 4,F (000) = 820,DC=2. 35g/cm3,μ(Moka) = 44. 1cm-1.The final R = 0. 0278 and Rw= 0. 0270 for 1760(I>3σ(I)) observed unique reflections. The neodymium ion is nine-coordinated by six oxygen atoms of carboxylato groups from four 1, 2, 4-benzenetricar-boxylates and three aqua molecules,forming a distorted monocapped square antiprism. The Nd -O distances fall in the range of 2. 41 - 2. 70A with an average of 2. 51A     

SYNTHESIS AND STRUCTURE OF A NEW TYPE OF COORDINATION COMPOUND OF Tb（Ⅲ）WITH BENZOIC ACID

<正> The synthesis and crystal structure of a novel rare earth coordination compound are reported. [TbL3(HL)H2O]2 (HL=henzoic acid) Mr=1324. 81, triclinic, space group P1, a=9. 148(1), b=11. 4 60(2), c=13. 506(2) A ;a=112. 76(1), B=91.83(1),y=91. 99(1) ;Z=1 ;V=1303. 3(4)A3;Dc=1.69g.cm-3;F(000)= 656;u=28. 4cm-1(MoKa). The final R is 0. 024. Each rare-earth ion in the title complex is nine-coordinated by seven oxygen atoms from five benzoate groups, one benzoic acid, and one aqua molecule, forming a distorted monocapped square antiprism.     

稀土苯多羧酸络合物的合成及其性质的研究

苯多酸作为配体,可以和稀土离子生成不同配比而结构特殊的化合物,同时这类化合物具有一系列有趣的性质。     

铕和铽与3,4-呋喃二甲酸双核配合物的合成、表征及其晶体结构

本文首次合成了铕(Ⅲ)和铽(Ⅲ)与3,4-呋喃二甲酸配合物,研究了它们的IR、DTA、TG、DTG和荧光光谱等性质,并完成了单晶的晶体分析。结果表明,配合物为〔Ln·HL_2(H_2O)_2〕_2·2H_2O(Ln=Eu(Ⅲ),Tb(Ⅲ);H_2L=3,4-呋喃二甲酸),属单斜晶系,P2/c空间群,Z=2,晶胞参数对铕和铽配合物分别为α=10.842(1),10.801(4);b=8.725(2),8.664(2);c=16.366(4),16.308(6)A;β=93.50(1),93.67(3)°;V=1545.3(5),1523.0(8)A~3。     

一种新型稀土苯甲酸铽配合物的合成、表征及其晶体结构

本文报道一种新型稀土苯甲酸配合物,[Tb(C_7H_5O_2)_3(C_7H_6O_2)(H_2O)]_2的合成。用元素分析、DTA、TG、DTG和IR光谱对其性质进行了表征,并测定了其晶体结构。晶体属三斜晶系,空间群为P1,Z=1。晶胞参数为:a=9.148(1),b=11.460(2),c=13.506(2)A;α=112.76(1),β=91.83(1),γ=91.99(1)°;V=1303.3(4)A~3。稀土离子形成九配位的单帽正方反棱柱型配合物,稍有崎变。     

CRYSTAL STRUCTURE OF ERBIUM（Ⅲ）COMPLEX WITH 1，3，5—BENZENETRICARBOXYLIC ACID

<正> The crystal structure of erbium (Ⅲ) complex of 1,3,5-benzenetricar-boxylic acid is reported. The title compound crystallizes in triclinic space group of P1 and cell parameters a = 7. 649(3) ,b= 9. 859(2) ,c= 11. 171 (3) A ;α= 106. 90(2),β= 104. 40(3),γ=107. 20(3)°;Z = 2;V = 716. 5A3.The final R and Rw are 0. 0328 and 0. 0338 respectively. The rare earth ion is nine-coordinated by four oxygen atoms from two carboxylato groups in two 1, 3, 5- benzenetricarboxylato groups and five aqua molecules, forming a distorted monocapped square antiprism. The Er-O distances fall in the range of 2. 327-2. 627A.     

1,2,4,5-苯四甲酸铒配合物的合成及其晶体结构

合成了NH4^+[ErC6H2(COO)4.3H2O]^-.4H2O晶体,并测定了其晶体结构,发现稀土Er^+^3跟苯四甲酸中的五个氧原子及三个水的氧原子配位,形成八配位的配合物.配位多面体呈二帽畸变三角反棱柱.晶体结构沿着(001)面呈现一个网状结构.这种结构对研究稀土元素的结构化学、配位化学,化学键理论等提供了有用的实验数据.