含酚氧桥的新型Cu(Ⅱ)-Mn(Ⅱ)和Cu(Ⅱ)-Co(Ⅱ)配合物的合成和磁性

合成了3种新型配合物[Cu(samen)Mn(NO_(2-)Phen)_2](1)、[Cu(sampn)Mn(NO_(2-)Phen)_2](2)和[Cu(samen)CO(terp)](3)(samen~(4-)、sampn~(4-)、NO_(2-)Phen和terp分别表示N,N′-乙二水杨酰胺根阴离子、N,N′-1,2-丙二水杨酰胺根阴离子、5-硝基-1,10-菲绕啉和联三吡啶),测得配合物的变温磁化率,求出交换积分,J分别为-63cm~(-1)(1)、—65cm~(-1)(2)和—7.68cm~(-1)(3),表明金属离子间有反铁磁超交换作用。     

含水杨酰胺合铜(Ⅱ)酸根的双核铜(Ⅱ)配合物的合成和磁性

本文合成了2个新型双核铜(Ⅱ)配合物,[Cu(samen)Cu(NO_2-phen)]·H_2O和[Cu(sampn)Cu(NO_2-phen)]·2H_2O,samen~(4-),sampn~(4-)和NO_2-phen分别表示N,N′-乙二水杨酰胺根阴离子,N,N′-1,2-丙二水杨酰胺根阴离子和5-硝基-1,10-菲绕啉。经元素分析,IR,电子光谱等手段推知该类配合物具有酚氧桥及其Cu(Ⅱ)离子的配位环境为畸变四方构型。测得配合物的变温磁化率(4—300K),其数值已用最小二乘法与修正的Bleaney-Bowers方程拟合,求得交换积分,J=—63.0cm~(-1)(samen)和—46.5cm~(-1)(sampn),表明标题配合物中有反铁磁性超交换作用。     

N,N′-乙二水杨酰胺合镍(Ⅱ)酸根的双核镍(Ⅱ)及镍(Ⅱ)-铜(Ⅱ)配合物的合成及性能研究

以N,N′-乙二水杨酰胺合镍酸钠同二价金属离子和2,2-联吡啶(bpy)或1,10菲绕啉(phen)反应制得双核配合物,[Ni(samen)Cu(L)]和[Ni(samen)Ni(L)_2](L=bpy,phen).经元素分析。红外、电子光谱等方法已推定[Ni(samen)]~2-中的Ni(Ⅱ)的配位环境为平面四方型,而被bpy或phen配位的Cu(Ⅱ)和Ni(Ⅱ),分别为平面四方型和畸变八面体构型。 据此,本文指派了配合物的电子光谱,评价了Dq,B,β等配位场参数,并且用配位场理论模型算出了有效磁矩,Ni(Ⅱ)-Cu(Ⅱ)配合物的g_(11),与g_1,结果理论值与实验值相当吻合。     

水杨酰胺合铜(Ⅱ)酸根和5-硝基-1,10-菲绕啉配位的Cu(Ⅱ)-Ni(Ⅱ)配合物的合成和磁性

本文合成了两个新型双核配合物,[Cu(samcn)Ni(L)_2]和[Cu(sampn)Ni(L)_2].samcn~(4-),sampn~(4-)及L分别表示N,N′-乙二水杨酰胺根阴离子,N,N′-1,2-丙二水杨酰胺根阴离子和5-硝基-1,10-菲绕啉(NO_2-phcn).经元素分析,IR和电子光谱等方法已推定配合物具有酚氧桥结构和Cu(Ⅱ)及Ni(Ⅱ)的配位环境分别为平面四方及八面体构型.配合物的变温磁化率已测(4-300K),其数值已用最佳拟合方法和从自旋哈密顿算符,H=-2JS_1·S_2导出的磁方程拟合,求得交换参数为J=-1.77cm~(-1)(samcn)和J=-1.74cm~(-1)(sampn),表明两个Cu(Ⅱ)-Ni(Ⅱ)双核配合物中有很弱的反铁磁性自旋交换相互作用.     

草酸根桥联的不对称双核铜(Ⅱ)和铜(Ⅱ)-锌(Ⅱ)配合物的合成与磁性

本文合成了一组新的不对称的双核配合物,[Cu_2(C_2O_4)_2terp]和〔Cu Zn(C_2O_4)_2terp〕(图1),terp表示联三吡啶。配合物〔Cu_2(C_2O_4)2terp〕的变温磁化率已测,其数值已用最小二乘法与Bleaney-Bowers方程拟合,求得交换积分J=-47.20cm~(-1)。文中还用Kahn理论解释了这种较弱的反铁磁自旋交换作用。     

N,N′-双(2-氨丙基)草酰胺合铜的双核Cu(Ⅱ)-Zn(Ⅱ)配合物的合成及光谱研究

含多原子桥联异双核配合物的研究对阐明生物体中的电子转移过程以及金属酶活性中心的本质有重要意义,基于草酰胺根的有效成桥功能,Kahn使用N,N′-双(3-氨丙基)草酰胺合铜(Cu(oxpn))作为双齿单核断片合成了双铜配合物[Cu(oxpn)Cu(bpy)](ClO_4)_2,最近,在我们实验室也用此单核断片合成了端接phen、NO_2-phen的双铜配合物和端接不同配体     

N,N′-1,2-丙二水杨酰胺合铜(Ⅱ)酸根的双核Cu(Ⅱ)配合物的合成与磁性

合成了一类新的金属配合物[Cu(sampn)CuL](sampn~(4-):N,N′-1,2-丙二水杨酰胺根离子;L:2,2-联吡啶或1,10-菲绕啉),经元素分析、IR、电子光谱等手段推定配合物具有酚氧桥结构,Cu(Ⅱ)离子的配位环境为畸变四方构型。测定了配合物的变温磁化率,其数值用最小二乘法与修正的Bleaney-Bowers方程拟合,从中得到较大的θ值,表明双核分子间有较大的分子间相互作用。     

SYNTHESIS AND MAGNETISM OF BINUCLEAR COPPER(Ⅱ) COMPLEXES CONTAINING SALUCYLAMIDATOCUPRATE(Ⅱ)

New binuclear copper(Ⅱ) complexes, [Cu(samen)Cu(NO_2-phen)]·H_2O and [Cu(sampn)-Cu(NO_2-phen)]·2H_2O have been synthesized, where samen~(4-), sampn~(4-) and NO_2-phen denote N, N′-ethylenedisalicylamidate anion, N, N′-1, 2-propanedisalicylamidate anion and 5-nitro-1, 10-phenanthroline respectively. 3ased on IR, elemental analyses and electronic spectra, the complexes are proposed to have a phenoxy-bridged structure and to consist of the Cu(Ⅱ)ion in distorted planar environment. The complexes have been characterized with varlable-temperature magnetic susceptibility (4—300 K) and the observed data were fit to those from a modified Bleaney-Bowers equation by least-squares method, giving the exchange integral J=-63.0 cm~(-1) (samen) and J=-46.5cm~(-1) (sampn). This indicates the existence of antiferromagnetic spin exchange interaction among the metal ions.     

草酰胺基桥联的新型Cu(Ⅱ)-Co(Ⅱ)配合物的合成和性质研究

合成了3种新型配合物[Cu(oxpn)Co(L)_2]·(CIO_4)_2·xH_2O。[Oxpn为N,N′-二(3-氨丙基)草酰胺基阴离子;L为2,2′-联吡啶(bpy)、1,10-菲绕啉(phen)和5-硝基-1,10-菲绕啉(NO_2-phen);x=1,2]。经元素分析、IR、电导和电子光谱等方法,推定配合物具有扩展的草酰胺桥结构,Cu(Ⅱ)及Co(Ⅱ)的配位环境分别为平面四方和八面体构型。配合物的变温磁化率已测(4.2～300K)。其数值已用最小二乘法与从自旋哈密顿算符导出的磁方程拟合,求得交换参数J为-22.36 cm~(-1)(bpy),-15.45 cm~(-1)(phen)和-19.10 cm~(-1)(NO_2-phen),表明金属离子间有较弱的反铁磁交换作用。     

新型N,N′-二(邻氧乙酸)苄叉丙二胺合铜(II)和镍(Ⅱ)及N-(邻氧乙酸)苄叉丙二胺合铜(Ⅱ)的合成、晶体结构及抑菌活性

在乙醇和水的混合溶液中,将N,N′-二(邻氧乙酸)苄叉丙二胺(1)与氯化铜反应,获得配合物Cu(Ⅱ)L1.H2O.0.25CH3CH2OH(2)[L1=N,N′-二(邻氧乙酸)苄叉丙二胺];当将反应混合溶液的pH值调至8~9,获得Cu(Ⅱ)ClL2.3H2O(3)[L2=N-(邻氧乙酸)苄叉丙二胺];将N,N′-二(邻氧乙酸)苄叉丙二胺(1)与氯化镍反应,获得配合物Ni(Ⅱ)L1.2.75H2O(4).用元素分析、1H NMR和IR谱等方法对所合成的化合物1和配合物2~4进行了表征,并测定了配合物2~4的晶体结构.在配合物2中,铜原子为六配位[CuN2O4],在配合物3中,铜原子为六配位[CuN2O3Cl],在配合物4中,镍原子为六配位[NiN2O4],三个配合物均为畸变八面体结构.抑菌活性大小的顺序:配合物3>配合物2>化合物1.     

SYNTHESIS AND STRUCTURES OF DICHLOROTETRAKIS-(PHENYLTHIOUREA) CADMIUM(II) AND CATENA-BIS(THIOCYANATE) BIS(PHENYLTHIOUREA)CADMIUM(II)

Abstract

Two new cadmium(II) complexes with phenylthiourea (PTU), namely Cd(PTU)₄Cl₂ (1) and [Cd₂(NCS)₂(μ₂-SCN)₂(PTU)₂(μ₂-PTU)₂] _n (2), have been prepared and characterized structurally by X-ray diffaction. Complex 1 crystallizes in the monoclinic space group C2/c, with a = 27.057(13), b = 8.108(3), c = 16.751(8) Å, β = 114.46°, V = 3345(3) ų, Z = 4. Complex 2 crystallizes in the triclinic space group P-1, with a = 9.336(3), b = 14.686(5), c = 16.911(5) Å, α = 71.36(2), β = 84.31(2), γ = 72.470(10)°, V = 2095.0(12) ų Z = 4. The structural analysis shows that each metal atom in both the mononuclear complex 1 and polynuclear complex 2 is octahedrally coordinated by four sulfur atoms and two chloro ligands or two nitrogen atoms from the thiocyanate groups, respectively. The PTU ligand can serve as either a monodentate ligand or a μ₂-bridging ligand upon coordination to a metal atom.     

镉(Ⅱ)与牛血清白蛋白的相互作用及pH、钙(Ⅱ)、锌(Ⅱ)和表面活性剂的影响

本文用恢复电位法、荧光分光光度法及粘度法研究了镉(Ⅱ)与牛血清白蛋白(BSA)的配位平衡和pH的影响。结果表明BSA有两类镉结合部位(2个强结合和10个弱结合部位)。Cd—BSA配位反应受pH影响,在近中性pH范围Cd(Ⅱ)与BSA结合未接近饱和时,以CURFIT程序对结合曲线拟合发现,每摩尔BSA平均结合Cd(Ⅱ)摩尔数的对数值与游离镉浓度的对数间成线性关系,进一步用Marguardt法处理得到Cd(Ⅱ)与BSA结合平衡方程式:N =K[Cd²⁺]^m,K和m均为pH函数。构象研究表明H⁺和Cd(Ⅱ)的结合都能引起BSA构象改变。用凝胶色谱法测定了Zn(Ⅱ)、Ca(Ⅱ)、吐温—80和十二烷基硫酸钠(SDS)对Cd—BSA结合的影响。Z_n(Ⅱ)可以竞争Cd(Ⅱ)在BSA上结合部位使Cd(Ⅱ)活动化。SDS能够有效抑制Cd(Ⅱ)与BSA结合,这种作用可能与SDS引起BSA构象改变有关。     

THE SYNTHESES AND PROPERTIES OF COBALT(II), NICKEL(II) AND COPPER(II) COMPLEXES WITH SOME 1,4-BENZODIAZEPINES

Abstract

The preparation and characterization of some cobalt(II), nickel(II) and copper(II) complexes with 7-chloro-2-methylamino-5-phenyl-3H-1, 4-benzodiazepin-4-oxide and 1, 3-dihydro-7-nitro-5-phenyl-2H-1, 4-benzodiazepin-2-one are reported. The complexes have been studied by means of magnetic susceptibility measurements, infrared and far infrared spectra, electronic spectra and conductivity measurements. Assignments for the metal-ligand and metal-halide bands have also been made. The evidence suggests that the cobalt(II) and nickel(II) complexes have a pseudotetrahedral symmetry, whereas the copper(II) complexes are octahedral.     

香草醛异烟酰腙与钴、镍、铜、锌和镉配合物的合成和性质研究

本文合成了香草醛异烟酰腙(H_2L~Ⅰ)和邻香草醛异烟酰腙(H_2L~Ⅱ)与钴(Ⅱ)、镍(Ⅱ)、铜(Ⅱ)、锌(Ⅱ)和镉(Ⅱ)的九个新配合物:M(HL~Ⅰ)_2·nH_2O[M(Ⅱ)=Co、Ni、Cu、Zn和Cd,n=0,2]和M(HL~Ⅱ)_2·nH_2O[M(Ⅱ)=Co、Ni、Cu和Zn,n=0-3]。采用元素分析、红外光谱、电子光谱、电导、磁化率、X-射线粉末衍射和热分析研究了两系列配合物的组成和性质。     

SYNTHESIS OF 1,2-DIHYDROXYIMINO-l-PHENYL-3,7-DIAZA-9,10-O-BENZALOCTANE AND ITS COMPLEXES WITH Co(II), Cu(II) AND Ni(II)

Abstract

A novel dioxime, 1,2 dihydroxyimino-3,7-diaza-9,10-O-benzaloctane (LH₂) was prepared by reaction of l,2-0-benzylidene-4-aza-7-aminoheptane and anti-phenylchloroglyoxime in absolute ethanol. Mononuclear complexes with a metal-ligand ratio of 1:2 were prepared with Co(II), Cu(II) and Ni(II). To elucidate the structures of the ligand and complexes, elemental analyses, IR, ¹H NMR and ¹³C NMR spectral data and magnetic susceptibility measurements have been examined.     

AQUEOUS EQUILIBRIA OF COPPER(II)- AND NICKEL(II)-POLYGLYCINE COMPLEXES

Abstract

Magnetic susceptibility measurements, new potentiometric data, optical spectra, and a new statistical method of calculation are combined in the formulation of an equilibrium scheme defining the dilute solution interactions of nickel(II) and copper(II) ions with diglycine, triglycine, and tetraglycine as a function of pH. At low pH appreciable concentrations of a previously unreported complex, MHL²⁺ (HL =polyglycine ligands) are shown to be present in all nickel(II)-polyglycine systems and in the copper(II)-triglycine system. This new protonated species is assigned a structure in which the metal ion is coordinated to the terminal carboxylate and to the adjacent peptide carbonyl oxygen with the proton residing on the terminal amino group. As the pH is raised in the 1:1 systems, MH_?1L, MH_?2L^? and MH_{_3}L^2- are formed in succession depending on the number of peptide linkages in the ligands, HL. The concentration of the monodeprotonated intermediate species NiH_?1L never exceeds 10% of the total metal ion concentration in the triglycine case and is always less than 0.5% when tetraglycine is the ligand. The dideprotonated intermediate NiH_?2L- reaches a maximum of 38% of the total metal concentration in the 1:1 Ni-tetraglycine system. An explanation is presented for this negative deviation from the predictions based on statistical grounds. Complete species distribution diagrams which include the new protonated complexes are presented and are employed to explain the differences in the interactions of copper(II) and nickel(II) ions with polyglycine ligands. Probable coordinate bonding sites suggested for the complexes formed in solution are inferred on the basis of stoichiometry, relative stabilities, and available microscopic information.     

REPARATION AND CHARACTERIZATION OF NEW SUPROFEN COMPLEXES OF Fe(III), Co(II) AND Ni(II)

Abstract

The preparation and properties of new complexes containing the biometals Fe(III), Co(II) and Ni(II) coordinated to the anti-inflammatory drug Suprofen are reported. The elemental analyses, together with the magnetic and thermal behavior and electronic, IR and Raman spectra, indicated the following stoichiometries for the latter two complexes: [M(Sup)₂(H₂O)₄]. For the Fe(III) complex, the generation of a dinuclear species may be proposed on the basis of ⁵⁷Fe Mössbauer measurements.     

STRUCTURES OF PYRIDINE CARBOXYLATE COMPLEXES OF COBALT(II) AND COPPER(II)

Abstract

The syntheses and crystal structures of [Co(nic)₂(H₂O)₄] (1). [Co(iso)₂(H₂O)₄] (2). [Cu(nic)₂(H₂O)₄] (3), and [Cu(iso)₂(H₂O)₄] (4) (nic = nicotinate; iso = isonicotinate) are reported. Complex 1 crystallizes in monoclinic, space group C2/m with cell parameters a =14.150(4). b = 6.883(2)., c = 8.497(2) Å, β= 118.28(2)° and Z = 2. The other crystals. 2. 3. and 4. are all triclinic, Pī; a = 9.777(3), b = 6.348(4), c = 6.888(3)Å, a= 113.10(6)., β= 110.55(3). γ = 97.61(5)°, and Z=l for 2; a = 7.0281(4), b = 7.7176(6), c = 8.6978(7)Å, a = 68.103(7), β = 68.526(5), γ = 62.550(6)°, and Z=1 for 3; a = 9.1807(4), b = 6.3334(3), c = 6.8871(3)Å, a= 108.213(4), β = 99.433(4), γ= 105.190(4)°, and Z= 1 for 4. The arrangements around the metal ions are trans-octahedra with two pyridyl nitrogens and two aqua oxygens in the equatorial positions and two aqua oxygens in the axial positions, although the Cu(II) complexes show a larger Jahn-Teller distortion.