Synthesis and Crystal Structure of Potassium triaqua（ethyleneamin—N,N,N‘,N’—tetraacetate）gadolinium（Ⅲ）pentahydrate

1 INTRODUCTION The chemistry of lanthanide (Ⅲ) complexes has a considerable history. The stereochemistry of the lanthanide (Ⅲ) complexes with ethyleneamine- N, N, N, N-tetraacetate (Edta) has been investigated[1~10]. Up to now, many Ln-Edta complexes with the chemical formulae of M[Ln(Edta)(H2O)m]nH2O (M = Na+, K+, Cs+, NH4+, Guanium; m = 2, 3; n = 0, 1, 3, 5) have been reported and suggested that the coordination modes and crystal systems for the Ln-Edta complexes depend on …     

[VS4-Cun] (n=3-6) 簇合物成簇反应的51V NMR研究

在核磁管内模拟反应体系(NH₄)₃VS₄/Et₄NBr/CuBr/PPh₃在CH₂Cl₂溶液中生成 [VS_4^-Cu_n](n=3-6)簇合物的过程. 利用⁵¹V NMR技术对反应过程进行准原位的实时监测,研究[VS₄Cu_n](n=3-6)簇合物的成簇条件和机理以及配体对成 簇过程的影响. 本文还详细讨论了反应溶液中不同浓度的PPh₃对[VS_4^-Cu₄] 簇合物的⁵¹V NMR化学位移的影响.     

51V NMR监测 [VS4-Cun](n≤6)簇合物自兜反应过程

采用　51VNMR监测在核磁管内模拟 (NH4 ) 3VS4 /Et4 NBr/CuBr/PPh3体系在CH2 Cl2 中的反应过程 ,研究了反应条件如反应物不同配比对生成各种 [VS4 Cun](n≤ 6)簇合物的影响 ,提供了该反应体系在CH2 Cl2 溶液中成簇过程的一些信息 .该方法不仅可用来研究反应机理 ,而且可用于指导一些条件难以确定 (溶剂、温度、酸碱度等 )的簇合物如低核数及更高核数V Cu S簇合物的合成     

〔NEt_4〕〔CoCl_3(PPh_3)〕的合成和晶体结构

标题化合物是反应体系 (NH4) 3VS4/CoCl2 (PPh3) 2 /NEt4Cl在CH2 Cl2 中反应而得到的 ,单晶X射线结构分析表明 :其晶体属于立方晶系 ,化学式为C2 6 H35 NCl3CoP ,空间群为Pa3 ,Mr=5 5 7.84,a =17.80 7(5 ) ,V =5 6 46 .4 3,Z =8,Dc=1.31g/cm3,F(0 0 0 ) =2 32 8,μ(MoKα) =9.6cm- 1 ,R =0 .0 6 2 ,Rw =0 .0 6 7。标题化合物分子结构具有结晶学三次轴对称性 ,Co(II)原子为四面体配位 ,键角Cl-Co -Cl(113 .4(2 )°)大于键角Cl-Co -P(10 5 .2 (2 )°)。同时也讨论了标题化合物的电子光谱和变温磁化率     

Crystal Structures and Photoluminescence of Two New Tetrazole-based Complexes

The solution reactions of the metal salts with 2,2＇-bipyfidine （2,2＇-bipy） and ethyl tetrazole-5-carboxylate （Hetzc） afforded two new tetrazole-based complexes M（2,2＇-bipy）2（etzc）2 （M=Mn 1, Zn 2）, and their crystal structures were determined by single-crystal X-ray diffraction analyses. Crystallographic data for 1： C28H26MnN12O4, Mr = 649.55, monoclinic, space group C2/c, a= 19.326（15）, b = 11.051（6）, c = 16.388（13）А,β= 117.38（4）° V= 3108（4） А^3, Z= 4, Dc = 1.388 g/cm^3, F（000） = 1340, R = 0.0557 and wR = 0.1269; and those for 2： C28H26ZnN12O4, Mr = 659.98, monoclinic, space group C2/c, a = 19.173（4）, b = 11.006（2）, c = 16.266（4） А, β= 118.11（3）°, V= 3027.4（11） А^3, Z = 4, Dc=1.448 g/cm3, F（000） = 1360, R = 0.0428 and wR = 0.1000. The structures of 1 and 2 are isomorphic and consist of isolated neutral mononuclear units. The metal atoms have highly distorted octahedral coordination environments with two N atoms from two etzc ligands and four N atoms from two 2,2＇-bipy molecules. The isolated mononuclear units are connected by π…π stacking interactions to generate one-dimensional chains. The thermal stability and photoluminescence have also been discussed.     

Synthesis,Structure and Characterization of a 3D Chiral Carboxylate and Phosphonate Metalorganic Framework Based on 1,1?-Biphenol Ligand

A novel phosphonate-based chiral metal-organic framework 1 was synthesized from C_2-symmetric 1,1?-biphenol-based ligand and structurally characterized by single-crystal and powder X-ray diffraction, Fourier-transform infrared spectra(FTIR), circular dichroism(CD) and thermogravimetric analyses(TGA). Two neighboring Mn ions are linked by two carboxylate groups and one phosphate group to form a di-manganese unit [Mn_2] and each [Mn_2] cluster in 1 is linked by five ligands, generating a 3D network with fns topology. In addition, the photoluminescence properties of 1 and H_4 L were investigated.     

草酸根桥联的钆-铬六核双金属配合物的红外光谱研究

通过２,２′－联吡啶取代的草酸铬化合物和氯化钆在水溶液中反应合成了草酸根桥联的钆－铬六核双金属配合物的晶体。本文着重讨论该配合物的红外光谱。．     

Syntheses and Crystal Structures of Di-, Tri- and Tetra-nuclear Cobalt(II)-Lanthanide(III) Carboxylate Complexes

1　ＩＮＴＲＯＤＵＣＴＩＯＮＩｎｔｈｅｐａｓｔｆｅｗ ｙｅａｒｓ ,ａｎｉｎｃｒｅａｓｉｎｇｉｎｔｅｒｅｓｔｈａｓｂｅｅｎ ｇｉｖｅｎｔｏｔｈｅｍａｇｎｅｔｉｃ ｐｒｏｐｅｒｔｉｅｓｏｆｍｏｌｅｃｕｌａｒｃｏｍｐｌｅｘｅｓｃｏｍｐｒｉｓｉｎｇｓｉｍｕｌｔａｎｅｏｕｓｌｙｌａｎｔｈａｎｉｄｅａｎｄｔｒａｎｓｉｔｉｏｎｍｅｔａｌｉｏｎｓｗｉｔｈｔｈｅａｉｍｏｆｃｌａｒｉｆｙｉｎｇｔｈｅｒｏｌｅｏｆｔｈｅｅｘｃｈａｎｇｅｉｎｔｅｒａｃｔｉｏｎｓｂｅｔｗｅｅｎ 3ｄａｎｄ 4ｆｍｅｔａｌｉｏｎｓｍｏｄｉｆｙｉｎｇ…     

V-Cu-S异金属簇合物的研究——Ⅰ.[VS_4(CuPPh_3)_4Br]的合成和晶体结构

以(NH_4)_3VS_4为起始原料,用低温固相法合成了标题簇合物,并测定其晶体结构.晶体属空间群P(?),单胞参数a=1.3139(10),b=2.5113(17),c=1.1800(8)nm,α=93.04(6)β=114.86(5),γ=96.71(7),Z=2,μ=21.4cm~(-1),R=0.084.在簇合物中,VS_4~(3-)保持较严格的四面体构型,并螯合四个Cu(I)离子连同桥Br-离子形成具有额外面的立方烷簇骼[VS_4Cu_4Br].