锌镉汞苯并咪唑配合物合成及生物活性

锌镉汞苯并咪唑配合物合成及生物活性杨鲁勤，阎世平，廖代正，姜宗慧，王耕霖，申泮文（南开大学化学系，天津３０００７１）近年随着医药化学的发展，过渡金属配合物的生物活性及药用价值正引起人们重视￣［１，２］．本文首次报道Ｚｎ、Ｃｄ、Ｈｇ与羟乙基三苯并咪唑甲...     

铁磁耦合的新型环状四核锰(Ⅱ)配合物的合成和晶体结构

本文合成了以邻苯二甲酸二价阴离子为桥基的3个新型的环上含4个锰(Ⅱ)离子的十六元大环配合物。化合物的组成用元素分析确定,并用IR、磁天平等手段对配合物进行了表征,测定了[Mn_4(μ-Phth)_2(bpy)_8](ClO_4)_4·3H_2O的晶体结构,空间群,a=14.276(6),b=14.369(9),c=15.54(1),α=70.22(5)°,β=61.73(6)°,γ=66.38(5)°,Z=1.对[Mn_4(μ-Phth)_2(bpy)_8](ClO_4)_4·3H_2O和[Mn_4(μ-Phth)_2(Phen)_8](ClO_4)_4·2H_2O进行了变温磁化率测量(4—300K),用最小二乘法可使其实验值与从自旋Hamilton算符,导出的磁化率理论曲线很好拟合,求得J=0.53cm~(-1)(bpy)和J=0.23cm~(-1)(Phen)。表明Mn—Mn间有弱的铁磁性交换作用。     

含烷氧基桥的双核Ni(Ⅱ)配合物的合成、表征和磁性

以Ｎ－氧化吡啶－２－甲醛和１，３－二氨－２－丙醇合成了含烷氧基桥的双Ｓｃｈｉｆ碱双核配体及其五个镍的双核配合物。通过元素分析、摩尔电导、红外光谱、ＴＧ对配合物进行了表征，并对其中两个配合物中Ｎｉ（Ⅱ）－Ｎｉ（Ⅱ）间磁交换作用进行了研究。     

{Cu2(tacn)2[μ-(MeN)2C2O2]}[(MeNH)2C2O2](ClO4)2的合 成、结构及性质研究

合成了双核配合物{Cu2(tacn)2[μ-(MeN)2C2O2]}[(MeNH)2C2O2](ClO4)2(tacn=1,4,7-三氮杂环壬烷)。通过元素分析、红外光谱、ESR谱和电子光谱对配合物进行表征，并利用单晶X射线衍射法测定其结构，晶体属单斜晶系，空间群为P21/n,a=0.72572(16)nm,b=2.5616(6)nm,c=0.9128(2)nm,β=90.096(5)°，V=1.6969(7)nm^3,Dcald=1.590Mg.m^-^3,Z=2,F(000)=840,R1=0.0529,wR2=0.1341,Gof=1.028,△ρ=632～390e.nm^-^3。晶体由对称的双核Cu单元、中性草酰胺分子及高氯酸根堆积而成。两个铜原子配位数为五，处于变形四方锥的配位环境中。在5～300K范围内磁性测定表明：配合物中存在反铁磁偶合相互作用，经理论拟合：g=1.98,J=-219cm^-^1。     

Synthesis and Crystal Structure of Copper(II) Complex with Mixed Bipyridine and 2-Hydroxy-1-naphthaldehyde Ligands

1 INTRODUCTION Galactose oxidase is a monomeric enzyme that catalyzes the stereospecific oxidation of a broad range of primary alcohol substrates and possesses a unique mononuclear copper site essential for catalyzing a two-electron transfer reaction during the oxidation of primary alcohol to corresponding aldehydes[1]. The catalytic reaction is shown in Eq. 1. RCH2OH + O2 RCHO + H2O2 (1) A recent report on the crystal structure of galactose oxidase reveals a unique mo…     

HPLC-DAD法测定辣椒及其制品中苏丹红Ⅰ的含量

二极管阵列检测器(DAD),高效液相色谱法定性定量测定辣椒产品中的苏丹红Ⅰ.方法具有良好的稳定性和重现性,切实可行.分析结果表明,在我国的辣椒及其制品中未曾检测到该物质的存在.     

Trinuclear Cu(Ⅱ) and Zn(Ⅱ) complexes bridged by μ_3-carbonato anion

The trinuclear Cu(Ⅱ) and Zn(Ⅱ) complexes [(CuTPA)_3(μ3-CO_3)] (ClO_4)_4(1) and [(ZnTPA)_3(μ_3-CO_3)] (ClO_4)_4 (2) (TPA=tri(pyridylmethyl) amine) have been synthesized. X-ray structure analysis of the two complexes proves that CO_3~(2-) anion has an unusual triply bridging ligand, bridging three CuTPA and ZnTPA units respectively, and assembles new trinuclear complexes. The CO_3_(2-) comes from atmospheric CO_2. The structure of each trinuclear unit consists of three copper or zinc atoms in a five-coordinate triangular bipyramidal environment. The [(CuTPA)_3 (μ_3-CO_3)] (ClO_4)_4 compound shows a very weak antiferromagnetic coupling.     

N，N′-双(2-吡啶甲基)二硫代草酰胺根桥联的三核铜(Ⅱ)配合物的合成及表征

Two new trinuclear copper(Ⅱ) complexes bridged with N,N′-Bis(2-pyridylmethyl)-Dithiooxamidate, ［Cu₃L₂］(ClO₄)₂(1) and ［Cu₃L₂］(NO₃)₂(2) (H₂L=N,N′-Bis(2-pyridylmethyl)-Dithiooxamide), have been synthesized, and characterized by elemental analyses, IR, UV-visible spectra, conductance and EPR spectra. The variable temperature magnetic susceptibility for complex (1) has been measured in the range of 1.5～298K. Experimental data of magnetic susceptibility are successfully fit to theoretical value based on the spin Hamiltonian operator: H=-2J(S₁S₂+S₂S₃)-2J′S₁S₃, S₁=S₂=S₃=1/2, giving the magnetic exchange parameters of 2J=-170 cm^-1 and 2J′=-7.2 cm^-1. This result indicates the presence of a strong antiferromagnetic spin exchange interaction between the Cu(Ⅱ) ions.     

Synthesis, characterization and crystal structures of manganese (Ⅱ) complexes containing nitronyl nitroxide and its reduced derivative

Two novel adducts of formula Mn(hfac)2( NITPhCl )2 (1) and [Mn(hfac)2(IMHPhCl)]2(NIT-PhCl)·0.5H2O (2), where hfac = hexafluoroacetylacetonate, NITPhCl = 2-(3-chlorophenyl)-4,4,5,5-tetram-ethylimidazolyl-1-oxyl-3-oxide, IMHPhCl = 2-(3-chlorophenyl)-4, 4, 5, 5-tetramethylimidazolyl-3-oxide, have been prepared by the reaction of Mn(hfac)2·2H2O with NITPhCl. Compound 1 is triclinic, space group P-1with a = 1.3003(3) nm, 6 = 1.3138(3) nm,c = 1.4931 (3) nm, α = 83.74(3)°, β = 77.77(3)°, γ = 60.59(3)°, V=2.171(1)nm3, Z = 2. Compound 2 is triclinic, space group P-1 with a = 1.2994(3) nm, b = 1.4841(3) nm, c = 2.1031 (4) nm, a = 92.30(3)° ,p = 98.68(3)°, γ = 97.89(3)°, V= 3.964(2)nm3, Z = 2. Each manganese atom is hexacoordinated in both compounds and compound 2 is organized inchains by hydrogen bonds between neighboring pairs of NITPhCl and IMHPhCl.