高氯酸四(DL-a-缬氨酸)八水合二钐的合成和结构

α-氨基酸在人体有极为重要的生理作用,近年来人们对其稀土配合物进行了广泛的研究。进一步研究稀土氨基酸配合物的单晶结构对于探讨稀土离子与生物体的作用是很有意义的。将高氯酸钐溶液与生化试剂DL-a-缬氨酸以1:1摩尔比混合,在75℃水浴中反应6小时,加热浓缩后,室温下缓慢挥发,即得到浅黄色透明棱状晶体。 结果与讨论     

草酸根桥联双核配合物[Cd2(phen)2ox(NO3)2·(H2O)2]的合成、结构及态密度分析

通过草酸钾(k2ox·H2O)、硝酸镉[Cd(NO3)2·4H2O]和1,10-邻菲咯啉(phen)在甲醇·水溶液中的反应合成了一种双核镉配合物[Cd2(phen)2ox(NO3)2(H2O)2],其结构经单晶X射线衍射表征.配合物属三斜晶系,P(1)空间群,晶胞参数:a=0.67629(14)nm,b=1.0051(...     

3-甲基-4-对甲基苯基-5-(2-吡啶基)-1，2，4-三唑双核铜(Ⅱ)配合物的合成、晶体结构及磁性

A dinuclear Cu(Ⅱ) complex [Cu₂(MMBPT)₂Cl₄(H₂O)_2.5] (I) [MMBPT=3-Methyl-4-(4-Methylphenyl)-5-(2-pyridyl)-1,2,4-triazole] was synthesized by reaction of MMBPT with CuCl₂·2H₂O and its structure was determined by X-ray crystal structure analysis. The structure indicates that the complex crystallizes in monoclinic, space group P2₁/c with a=1.273 4(3) nm, b=1.237 5(3) nm, c=2.403 2(5) nm, β=90.51(3)°. V=3.786 6(13) nm³, Z=2, D_c=1.429 Mg·m^-3, μ=1.445 mm^-1, F(000)=1 660, and final R₁=0.055 5, wR₂=0.129 7. The crystal structure shows that the dinuclear Cu₂N₆ unit is almost planar in which each Cu(Ⅱ) ion was five-coordinated by one nitrogen atoms from MMBPT and two chlorine in the basal positions and two nitrogen atoms from two MMBPTs respectively in the axial one, to form a distorted trigonal bipyramidal geometry. Magnetic measurements reveal a relatively strong antiferromagentic interaction in the complex. CCDC: 720011.     

双核铜(Ⅱ)配合物在H2O2存在下对DNA的氧化切割活性

A novel dinuclear copper(Ⅱ) complex, [Cu₂(phen)(dipic)₂(H₂O)₂]·2H₂O (phen=1,10-phenanthroline, dipicH₂=2,6-pyridinedicarboxylic acid), has been prepared and structurally characterized. The complex crystallizes in the triclinic system, space group P1 with cell parameters a=0.846 0(17) nm, b=1.289 5(3) nm, c=1.452 7(3) nm, α=77.42(3)°, β=79.11(3)°, γ=87.08(3)°, and V=1.518 8(6) nm³. The dinuclear complex shows potential DNA cleavage activity at micromolar concentration in the presence of H₂O₂ and exhibits higher nuclease efficiency than mononuclear complex [Cu(dipic)(H₂dipic)]·H₂O. Without external reductants, the added H₂O₂ may contribute to the generation of hydroxyl radicals that result in DNA strand scission.CCDC:291786.     

Hydrothermal Synthesis,Crystal Structure and Thermal Stability Properties of the Complex [Cd2(phen)2(C14HuO3)4(CH3CH2OH)]·(CH3OH)·(H2O)

T A dinuclear cadmium complex[Cd2(phen)2(C14H11O3)4(CH3CH2OH)]·(CH3OH)·(H2O)has been synthesized with benzilic acid and 1,10-phenanthroline by hydrothermal method.The crystal structure was determined bv X-ray diffraction with crystal parameters as follows:triclinic system with space group P-1,α=1.21298(10),b=1.32586(1 1),c=2.4815(2)nm,α=76.2630(10),β=81.4500(10),γ=69.1700(10)°V=3.6143(5)nm3,Dc=1.438g/cm3,Z=1,F(000)=1600,the final GOOF=0.937,R=0.0521 and wR=0.1328.In the title complex,the dinuclear structure is defined by carboxyl oxygen atoms adopting a monodentate bridged coordination mode.The coordination environment of Cd(Ⅱ)ion is CdO4N2,giving a distorted octahedral coordination geometry.TG analysis shows that the title complex is stable under 140℃.     

一个双核镍配合物[Ni2(Htda)2(H2O)6]·4H2O的合成、晶体结构和性质

双核金属配合物对于生物化学和磁化学都是非常重要的.在本文中,1,2,3-三氮唑-4,5-二羧酸(H3tda)配体和硝酸镍在常温常压下反应得到了1个三氮唑桥联的双核镍配合物[Ni2(Htda)2(H2O)6]·4H2O(1),并通过元素分析、红外光谱、X-射线单晶衍射、热重分析以及超导量子干涉仪(SQUlD)对其晶体结构和磁、热性质进行了表征.晶体数据表明该配合物属三斜晶系,空间群为P(1).在配合物1中,2个1,2,3-三氮唑-4,5-二援酸配体利用2个相邻的氮原子桥联2个金属镍离子形成一个双桥的双核镍配合物.这些双核镍单元又通过体系中存在的大量的氢键相互作用形成了三维超分子骨架.磁性分析显示双核镍单元内镍镍之间存在反铁磁相互作用.     

氮杂大环双核铜锌金属配合物的合成结构及溶液中配位稳定性研究

在合成模型化合物之前 ,有必要先了解合成的大环配体在溶液中与金属离子的配位行为及其稳定性 ,以便选择不同结构的大环配体和控制反应的 p H值合成出结构和催化性能较好的模型化合物 [1～ 3] .本文报道了大环配体与 Cu( )和 Zn( )形成的配合物 ,对其结构和溶液中的配位稳定性进行了研究 .1　实验部分1 .1　试剂与仪器配体 L以 2 ,6-吡啶二甲醛和二乙烯三胺为原料 ,按文献 [4]报道的方法经 2 + 2合成得到 .其纯度经元素分析、红外光谱、核磁共振氢谱和质谱鉴定 .其它试剂均为分析纯 . p H滴定采用二次蒸馏水 .Perkin- Elmer 2 4 0型元…     

双核Cd(Ⅱ)配合物[Cd2(C22H14N4)2Cl2(N3)2]2·H2O的合成与晶体结构

A dinuclear Cd(Ⅱ) complex [Cdz (N3)2LzCl2]2·H2O (1) [L=4'-(4-eyanophenyl)-2,2':6',2"-terpyridine]was synthesized by reaction of ligand L with CdCl2 and NaN3 using solvothermal method and its structure was determined by X-ray crystal structure analysis. The structure indicates that the complex crystallizes in monoclinic, space group C2/c with a=1.644 5(16) nm, b=1.441 9(12) nm, c=1.9181(18) nm,β=100.349(11)°. V=4474(7) nm3, Z=2, Dc=1.570Mg·m-3,μ=1.120 mm-l, F(000)=2 100, and final R1=0.039 3, wR2=0.0811. The result shows a Cd(Ⅱ) ion was sixcoordinated by a tridentate 4'-(4-cyanophenyl)-2,2' :6',2"-terpyridine ligand and one bridging nitrogen atom of the azide group in the basal position and an chloride atom and the other bridging nitrogen atom of the azide group in the axialone, to form a distorted octahedral-pyramidal geometry. CCDC: 673291.     

[Ho_2(phen)_4(H_2O)_4(OH)_2](phen)_2(NO_3)_4的合成、晶体结构及磁性

在甲醇与水的混合溶剂中,经浓硝酸硝化的Ho_2O_3与1,10-邻菲啰啉反应形 成氢氧根桥联的双核钬配合物[Ho_2(phen)_4(H_2O)_4(OH)_2] (phen)_2(NO_3)_4 （phen = 1,10-邻菲啰啉）。单晶X射线衍射晶体结构测定表明晶体属三斜晶系, P1-bar (no. 2)空间群,晶胞参数a = 1.1241(1) nm, b = 1.1439(1) nm, c = 1. 4058 (1) nm, α = 93.989(7)°, β = 98.173(7)°, γ = 108.19(1)°, V = 1.6874(4) nm~3, Z = 1, D_c = 1.737 g/cm~3, F(000) = 880,7752个独立衍射 点中,5702个可观测点满足F_o~2 ≥ 2σ (F_o~2),R_1 = 0.0499, wR_2 = 0. 858。标题配合物由中心对称的双核[Ho_2(phen)_4(H_2O)_4-(OH)_2]~(4+)配阳离 子,邻菲啰啉phen分子及硝酸根NO_3~-阴离子组成。敏个稀土原子与2个邻菲啰啉 配体,2相水分子和2个氢氧根配位形成配位数为8的[HoN_4O_4]四方反棱柱。配位 多面体通过两氢氧根基团形成共棱的[Ho_2N_8O_6]双四方反棱柱[d(Ho-N) = 0. 2549～0.2565 nm, d(Ho-O_(H_2O) = 0.2356, 0.2366 nm, d(Ho-O_(OH)) = 0. 2223, 0.2240 nm]。通过氢键和芳环堆积作用,配阳离子和邻菲啰啉分子排列形成 平行于（10 1-bar）的两维层结构,NO_3~-阴离子位于层之间。标题配合物为顺磁 物质,在5 ～300K区间内遵循Curie-Weiss定律X_m (T + 4.43) = 14.72 cm~3·K ·mol~(-1)(X_m为每摩尔Ho~(3+)离子磁化率）,其Ho~(3+)离子的室温有效磁矩为 10.76 B. M.,与Ho~(3+)自由离子的磁矩基本相同,表明稀土离子间不存在磁交换 作用。     

稀土配合物{La［o-C6H4(NO2)(CO2)］3·(DMF)2}2的晶体结构及其荧光性能

合成了一种新的双核倒反中心的稀土镧配合物{La［o-C6H4(NO2)(CO2)］3·(DMF)2}2. 通过元素分析、 核磁共振谱和红外光谱对配合物的组成和结构进行了表征,  用热重分析研究了该配合物的热稳定性,  用X射线单晶衍射法测定了其晶体结构. 镧配合物{La［o-C6H4(NO2)(CO2)］3·(DMF)2}2晶体属三斜晶系, 空间群P1,  晶胞参数a=1.902(2) nm, b=1.245 0(2) nm, c=1.298 7(2) nm, α=64.555(2)°, β=66.348(2)°, γ=71.920(2)°, V=1.569 5(5) nm3, Dc=1.658 Mg/m3, Z=2, μ=1.437 mm-1, F(000)=784. 配合物中有2个La(Ⅲ)被4个邻硝基苯甲酸的羧酸根的负氧离子桥联, 每个La(Ⅲ)的中心离子配位数为9,  配位原子分别来自于7个邻硝基苯甲酸的羧酸根的负氧离子和2个DMF的羰基氧原子. 化合物中的氢键和π…π堆积作用使其成为三维立体结构. 同时发现了标题化合物固体具有光致发光现象, 发光性能测试表明， 配合物具有很好的荧光性质.     

Hydrothermal Synthesis,Crystal Structure and Thermal Stability Properties of the Complex [Cd_2(phen)_2(C_(14)H_(11)O_3)_4(CH_3CH_2OH)]·(CH_3OH)·(H_2O)

A dinuclear cadmium complex [Cd2(phen)2(C14H11O3)4(CH3CH2OH)]·(CH3OH)·(H2O) has been synthesized with benzilic acid and 1,10-phenanthroline by hydrothermal method.The crystal structure was determined by X-ray diffraction with crystal parameters as follows:triclinic system with space group P1,a = 1.21298(10),b = 1.32586(11),c = 2.4815(2) nm,α = 76.2630(10),β = 81.4500(10),γ = 69.1700(10)o,V = 3.6143(5) nm3,Dc = 1.438 g/cm3,Z = 1,F(000) = 1600,the final GOOF = 0.937,R = 0.0521 and wR = 0.1328.In the title complex,the dinuclear structure is defined by carboxyl oxygen atoms adopting a monodentate bridged coordination mode.The coordination environment of Cd(Ⅱ) ion is CdO4N2,giving a distorted octahedral coordination geometry.TG analysis shows that the title complex is stable under 140 ℃.     

4-甲基苯硫乙酸与含氮配体构筑的两个化合物的合成，晶体结构，热稳定性与发光性质的研究

合成了2个配合物[ZnL₂(Him)₂] (1)和[ (Cu₂L₂(phen)₂( μ₂-Cl)₂)·(Cu₂( μ₂-L)₂(phen)₂Cl₂)] (2)(L=4-甲基苯硫乙酸,Him=咪唑,phen=1,10-邻菲咯啉),进行了元素分析、红外、热重等表征,并测定了其晶体结构。配合物1晶体属于单斜晶系,空间群为C2/c。配合物2晶体属于三斜晶系,空间群为P1。配合物1是由N-H…O氢键作用形成的一维带状结构。配合物2的单胞中含有2个分别由氯原子与羧基氧原子桥联的双核独立分子,通过C-H…O,C-H…Cl氢键以及C-H…π作用而构成三维结构。室温固体荧光分析显示配合物1具有较强荧光吸收。     

3-甲基-4-对甲基苯基-5-(2-吡啶基)-1，2，4-三唑双核锰(Ⅱ)配合物的合成及晶体结构

A dinuclear Mn(Ⅱ) complex [Mn₂L₂(μ-Cl)₂Cl₂(H₂O)₂] (1) was synthesized by reaction of ligand L with MnCl₂ ·4H₂O and its structure was determined by X-ray crystal structure analysis. The structure indicates that the complex crystallizes in monoclinic, space group C2/c with a=2.018 0(15) nm, b=0.894 0(6) nm, c=1.932 1(14) nm, β=97.506(12)°. V=3 456(4) nm3, Z=4, D_c=1.515 Mg·m^-3, μ=1.081 mm^-1, F(000)=1 608, and final R₁=0.043 8, wR₂=0.109 9. The result shows a Mn(Ⅱ) ion was six-coordinated by a bidentate 3-methyl-4-( p-methylphenyl)-5-(2-pyridyl)-1,2,4-triazole, one chlorine and one bridging chlorine atom in the basal positions and one chloride atom and one water molecule in the axial one, to form a distorted octahedral-pyramidal geometry. CCDC: 713047.     

取代四甲基环戊二烯基钼羰基化合物的合成及晶体结构

<正>0引言自20世纪50年代二茂铁[1-2]发现以来,环戊二烯基金属有机化合物成为研究最多的一类金属有机化合物,特别是20世纪80年代初茂金属催化剂的发现,使环戊二烯基金属有机化合物     

2-氨基-5-硝基吡啶乙酸根桥联双核铜配合物的合成和晶体结构

2-氨基-5-硝基吡啶与Cu(CH3COO)2反应生成一个新的乙酸根桥联的双核铜配合物[Cu(CH3COO)2(C5H5N3O2)]2.2H2O.该配合物中,铜原子与一个吡啶环上N原子和四个乙酸根上O原子配位形成五配位的四方锥构型.其晶胞参数为:单斜晶系,空间群P21/c,a=0.834 5(8),b=2.001(2),c=0.808 1(8)nm,β=96.734(4)°,V=1.340(2)nm3,Z=2,Mr=657.37,Dc=1.629 g/cm3,F(000)=652,μ=1.663 mm-1,R1=0.060 4,wR2=0.126 4.电子吸收光谱在207 nm处有吸收;电子发射光谱在419 nm处有发射峰.并用IR和元素分析对配合物进行了表征.     

硫酸根和碳酸根桥联的双核铁(Ⅲ)配合物晶体结构及紫外-可见光谱研究

室温下合成了硫酸根和碳酸根桥联的双核铁()配合物{2[(TPA)₂Fe₂O(SO₄)](ClO₄)₂·1.5H₂O(1),[(TPA)₂Fe₂O(CO₃)](ClO₄)₂·CH₃OH(2)},并用X射线衍射测定了其晶体结构.结果表明,配合物1为单斜晶系,空间群为P2₁/c,a=1.150(2)nm,b=2.659(5)nm,c=2.933(5)nm,β=99.40(3)°,R=0.0564,wR=0.1106.配合物2为单斜晶系,空间群为P2₁/c,a=1.1368(3)nm,b=1.8280(5)nm,c=2.0542(5)nm,β=94.867(5)°,R=0.0567,wR=0.1362.研究了室温下的紫外-可见光谱性质.     

双核铜(Ⅰ)配合物的合成、晶体结构与性质研究

本文合成了1个新的铜双核配合物[(CuI)(PMN)]2.2CH3CN(PMN=2、4-二氨基-5-氯苯基-6-乙基嘧啶),并且通过元素分析、红外、荧光、热重和单晶X-射线进行了表征。该配合物属三斜晶系,空间群P1,a=0.8100(16)nm,b=0.96950(19)nm,c=1.2049(2)nm,α=97.88(3)°,β=93.31(3)°,γ=94.14(3)°,V=0.933 8(3)nm3,Z=1,R=0.037 1。在配合物中,每个Cu(Ⅰ)离子与PMN配体的1个N原子和2个I原子配位,展示出三角几何构型。相邻的2个Cu(Ⅰ)离子通过碘原子相连形成双核铜配合物,并进一步通过氢键和I…I作用形成三维网状结构。     

基于[(Tp)Fe(CN)3]-氰基桥联双核配合物的合成、结构和磁性研究

采用[TpFe^Ⅲ(CN)₃]^-作为构筑基块，合成并表征了一个氰基桥联双核配合物[(Tp)Fe^Ⅲ(CN)₃Cu^Ⅱ(bpy)₂]ClO₄·CH₃OH (1)。对化合物1进行了晶体结构分析，其晶胞参数为a=0.904 26(5) nm，b=1.352 56(7) nm，c=1.556 02(8) nm，α=106.08(1)°，β=95.79(1)°，γ=91.01(1)°，P1空间群。在这个化合物中，[TpFe^Ⅲ(CN)₃]通过其中1个氰基与[Cu(bpy)₂]²⁺桥联，而另外2个氰基未参与配位。磁性研究表明，在化合物1中，Cu(Ⅱ)与Fe(Ⅲ)离子之间表现为铁磁相互作用。用哈密顿函数H=-2JS_FeS_Cu对其χ_MT-T曲线进行了拟合，得到1的朗德因子g=2.34和交换常数J=5.52 cm^-1。     

Proton-Induced Tuning of Electrochemical and Photophysical Properties in Mononuclear and Dinuclear Ruthenium Complexes Containing 2,2'-Bis(benzimidazol-2-yl)-4,4'-bipyridine: Synthesis, Molecular Structure, and Mixed-Valence State and Excited-State Properties

A series of mono- and dinuclear Ru(bpy)(2) complexes (bpy = 2,2'-bipyridine) containing 2,2'-bis(benzimidazol-2-yl)-4,4'-bipyridine (bbbpyH(2)) were prepared. The mononuclear complex [Ru(bpy)(2)(bbbpyH(2))](ClO(4))(2).CH(3)OH.4H(2)O was characterized by an X-ray structure determination. Crystal data are as follows: triclinic, space group P&onemacr;, a = 14.443(4) ?, b = 15.392(4) ?, c = 11.675(2)?, alpha = 101.44(2) degrees, beta = 107.85(2) degrees, gamma = 96.36(2) degrees, V = 2380(1) ?(3), Z = 2. The coordination geometry of the ruthenium(II) ion is approximately octahedral. The dihedral angle between the two pyridyl rings in bbbpyH(2) is 9.4(3) degrees, which is close to coplanar, in the complex. Mono- and dinuclear complexes exhibit broad charge-transfer absorption bands at 420-520 nm and emission at 660-720 nm in CH(3)CN solution with lifetimes of 200-800 ns at room temperature. Transient difference absorption spectra and resonance Raman (rR) spectra were used to assign the charge-transfer bands in the 420-520 nm region and to identify the lowest excited states. Both absorption and emission spectra are sensitive to solvent and solution pH. Deprotonation of the dinuclear complex raises the energies of the pi orbitals of the bbbpyH(2) ligand, so that they become closer in energy to the pi orbitals of bpy. The intervalence band of [(bpy)(2)Ru(bbbpyH(2))Ru(bpy)(2)](5+)()()is observed at 1200 nm ( epsilon = 170 M(-)(1) cm(-)(1)) in CH(3)CN. The value of the electronic coupling matrix element, H(AB), was determined as 120 cm(-)(1). Upon deprotonation, the IT band was not observed. It is therefore concluded that a superexchange pathway occurs predominantly via the Ru(II) dpi-bbbpyH(2) pi interaction, since deprotonation decreases the interaction. The role of the intervening fragments in the bridging ligand is discussed from the viewpoint of orbital energies and their orbital mixing with Ru dpi orbitals.     

Ru-BDPX-DPEN催化芳香酮的不对称氢化反应

设计合成了一种新型的钌-双膦-手性二胺三元配合物RuC l2(BDPX)[(S,S)-DPEN][BDPX=邻-二(二苯基膦)甲苯,DPEN=1,2-二苯基乙二胺].利用此配合物作催化剂催化了苯乙酮和几种取代苯乙酮的不对称氢化反应;考察了多种因素对苯乙酮不对称氢化反应的转化率和ee值的影响.结果表明,此配合物对苯乙酮进行不对称氢化反应具有良好的催化性能和较高的对映选择性,在优化的条件下,当苯乙酮、配合物的摩尔比为20000?1时,其不对称氢化反应的转化率可达到100%,其ee值可达到59.0%;对取代苯乙酮的不对称氢化反应也具有一定的催化活性和中等的对映选择性.