2,2′联吡啶和氯醌酸与稀土Gd(Ⅲ)和Er(Ⅲ)双核配合物的合成与磁性

合成了两个新的稀土双核配合物Gd_2(bpy)_2(CA)_3·8H_2O和Er_2(bpy)_2(CA)_3·4H_2O,bpy和CA分别代表2,2’-联吡啶和氯醌酸的二价阴离子。已测定其变温磁化率。其数值用最小二乘法与理论方程拟合,求得J=-1.9cm~(-1),表明配合物中Gd(Ⅲ)离子之间存在极弱的反铁磁相互作用。     

具有非正规自旋态结构的新型Mn(Ⅱ)-Cu(Ⅱ)-Mn(Ⅱ)三核配合物的合成和磁性

合成和表征了四种新的异三核配合物,{[Mn(L)_2]_2[Cu(Pba)]}(ClO_4)_2,其中Pba表示为亚丙基-1,3-双(草胺酸根);L表示1,10-菲咯啉(phen)、5-硝基-1,10-菲咯琳(NO_2-phen)、2,2’-联吡啶(bpy)、4,4′-二甲基-2,2’-联吡啶(Me_2bpy).基于{[Mn(phen)_2]_2[Cu(pba)]}(ClO_4)_2·H_2O的变温磁化率测量(4.2～300K),求出交换积分J=-41.5cm(-1),表明Mn(Ⅱ)和Cu(Ⅱ)离子间为反铁磁耦合.在 X_MT-T图上,X_MT在175K附近呈现出一极小值,这是具有非正规自旋态结构的多金属耦合体系的典型特征.     

若干μ_3-氧桥三核锰(Ⅲ)Schiff碱配合物的研究

用元素分析、电导率、磁化率、热分析、红外光谱和电子光谱等方法对新合成的7种μ_3-氧桥三核锰(Ⅲ)Schiff碱配合物:Mn_3O(bzaea)_2(C_2H_3O_2)_3、Mn_3O(bzaea)_2(C_2H_3O_2)_2(NCS)、Mn_3O(bzaea)_3ClO_4·2H_2O、Mn_3O(bzaea)_2(C_2H_3O_2)_2Br、Mn_3O(bzaea)_3I·2H_2O、Mn_3O(bzaea)_2(C_2H_3O_2)_2NO_3和Mn_3O(bzaea)_2(C_2H_3O_2)_2BPh_4·3H_2O(其中bzaea~(2-)是三齿Schiff碱2-(β-羟基乙基-亚胺)-4-苯基-丁酮(4)的负二价阴离子)进行了研究,并提出了配合物的可能构型。     

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。     

N,N＇-二(3-氨丙基)草酰胺合铜的双核Cu(Ⅱ)-Zn(Ⅱ)配合物的合成和结构

合成和表征了三个异核配合物:[Cu(oxpn)Zn(bpy)_2](ClO_4)_2·1/2H_2O(1),[Cu(oxpn)Zn-(phen)_2](ClO_4)_2·2H_2O(2),[Cu(oxpn)Zn(NO_2-phen)_2](ClO_4)_2·2H_2O(3)[bpy=2,2′-联吡啶、phen=1,10-菲咯啉、NO_2-phen=5-硝基-1,10-菲咯啉、oxpn=N,N′-二(3-氨丙基)草酰胺阴离子].2的晶体属单斜晶系,P2/n 空间群,晶胞参数:a=1.5061(3),b=1.2924(3),c=2.2802(3)nm,β=108.42(2)°,V=4.1869 nm~3,Z=4,D_m=1.409g/cm~3,μ=12.812cm~(-1),F(000)=1812,最终的偏离因子 R=0.093,R_w=0.099.结构分析证实,配合物具有扩充的草酰胺桥联结构,Cu(Ⅱ)及 Zn(Ⅱ)的配位环境分别为平面四边形和畸变的八面体构型,阳离子的对称性近似为 C_(2v).此外,本文还指派了配合物的电子光谱,并对 EPR、有效磁矩等数据进行了讨论.     

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     

含草酰胺桥的新型Cu(Ⅱ)—Ln(Ⅲ)—Cu(Ⅱ)三核配合物的合成和磁性

合成了五个以草酰胺为桥联的新型三核配合物[Cu(oxpn)]2Ln(SCN)_3·xH_2O,oxpn为N,N′-二(3-氨丙基)草酰胺根阴离子,Ln为Pr,Nd,Gd,Tb,Dy。测定了[Cu(oxpn)]_2Gd(SCN)_3·1.5H_2O的变温磁化率,求出交换积分J(Cu-Gd)为1.12cm~(-1)和J(Cu-Cu)为-1.62cm~(-1)。表明,Cu(Ⅱ)和Gd(Ⅲ)离子间有弱的铁磁性超交换作用。     

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。     

[(NH_3)_5CoimM(tren)](ClO_4)_4·2H_2O[M=Cu(Ⅱ),Zn(Ⅱ)]的合成、表征及咪唑桥的断裂

本文合成了两个新的异双核咪唑桥联配合物[(NH_3)_5CoimM(tren)](ClO_4)_4·2H_2O[M=Cu(Ⅱ),Zn(Ⅱ);im=咪唑基],用热重差热、反射光谱、ESR 等手段进行表征,证实咪唑桥的存在.用pH 法结合计算机拟合,定量地模拟了异双核配合物中咪唑桥的断裂过程,表明在水溶液中,金属-咪唑键首先从非钴(Ⅲ)端断裂.     

双(正-丙基亚砜)乙烷钴(Ⅱ)配合物的研究Ⅱ

本文合成了硝酸钴(Ⅱ),氯化钴(Ⅱ),硫氰酸钴(Ⅱ)与内、外消旋的双(正-丙基亚砜)乙烷(以A表示)六个固体配合物:[Co_2(α-A)_3Cl_4]·H_2O、[Co(β-A)_2(NO_3)_2)·H_2O、[Co(β-A)_2(NO_3)_2]、[Co_2(α-A)_2(SCN)_4]·2H_2O和[Co(β-A)_2(SCN)_2](α-A和β-A各是外、内消旋的C_3H_7S(O)(CH_2)S(O)C_3H_7)。由元素分析、红外光谱、磁化率、电导及离子交换等研究结果表明配体A以二个氧原子与Co(Ⅱ)配位形成七元环的配合物。并确定Co_2(α-A)_3Cl_4为[Co(α-A)_3][CoCl_4]的配合物。初步认为[Co(α-A)(NO_3)]NO_3·H_2O为畸变的四面体配合物。其余四个配合物均为高自旋、畸变八面体,它们的结构可能是:及[Co(β-A)_2(SCN)_2]。对[Co(β-A)_2(NO_3)_2、[Co(β-A)_2(H_2O)_2](ClO_4)_2·H_2O及[Co(β-A)_2(SCN)_2]的Dq值计算结果表明NO_3~-、H_2O和SCN~-与Co(Ⅱ)配位符合配合物的光化序。     

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.     

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。     

The excited states of bipyridyl and phenanthroline complexes of Fe(III), Ru(II) and Ru(III): A molecular orbital study

The semiempirical zero-differential-overlap molecular orbital model which was shown in earlier papers in this series to give a good account of the charge transfer and -* spectra of Fe(II) complexes with conjugated ligands such as 2,2-bipyridyl and 1,10-phenanthroline is extended to complexes having openshell ground states, such as those of Fe(III), and to complexes of Ru(II) and Ru(III). The results are used to assign the observed charge transfer and intra-ligand absorption bands to specific orbital transitions. Observed and calculated intensities are in good agreement: reasons are advanced for the much lower intensity of the charge transfer bands in Ru(III) compared to Ru(II) complexes.     

Separation of Ga(III) from Cu(II), Ni(II) and Zn(II) in aqueous solution using synthetic polymeric resins

Poly (acrylamide-acrylic acid-dimethylaminoethylmethacrylate), p(AM-AA-DMAEM) and Poly(acrylamide-acrylic acid)-ethylenediaminetetracetic acid disodium, p(AM-AA)-EDTANa₂ were prepared by gamma radiation-induced template polymerization technique and used for the separation of Ga (III) from Cu (II), Ni (II), and Zn (II) in aqueous media. The effect of pH and contact time on the separation process was studied. The optimum pH value for the separation process is 3–3.5. The result shows that Ga (III) is first extracted while Cu (II), Ni (II) and Zn(II) are slightly extracted at this pH value. The recovery of metals using HCl, HNO₃ and H₂SO₄ has been studied. The resins may be regenerated using 2M HCl solutions.      

Rhodium(III), palladium(II) and platinum(II) complexes of Bis(o-aminobenzenesulfonyl)ethylenediamine

New complexes of the formulae K₃[RhL ₃]·2 H₂O, [PdL]·H₂O and [M(LH₂)Cl₂] [whereM = Pd, Pt andLH₂ = bis(o-aminobenzenesulfonyl)ethylenediamine] have been prepared and characterized by conductivity measurements, thermogravimetric analysis, X-ray powder patterns and IR, Ligand Field and¹H-NMR spectroscopy.

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Rhodium(III), Palladium(II)- und Platin(II)-Komplexe mit Bis(o-aminobenzolosulfonyl)ethylendiamin (Kurze Mitteilung)

Zusammenfassung Neue Komplexe der allgemeinen Formeln K₃[RhL ₃]·2H₂O, [PdL]·H₂O und [M(LH₂)Cl₂] mitM = Pd, Pt undLH₂ = Bis(o-aminobenzolosulfonyl)ethylendiamin wurden dargestellt und mit Konduktionsmessungen, thermogravimetrischen Analysen, Röntgenstrukturanalysen, IR, Ligandfeld- und¹H-NMR-Spektroskopie charakterisiert.

     

Dieisen(III)-hexacyanoferrat(II)-oxid

The title compound3 has been obtained through the action of molecular oxygen upon di-iron(II)-hexacyanoferrate(II)1 which has been prepared by thermal decomposition of ammonium hexacyanoferrate(II)2 in vacuum.2 und3 have been characterized by analytical methods andMössbauer-spectroscopy.3 and the analogous halogen compounds are semiconductors with a conductivity of 2 to 5 · 10^–5 S/cm.2 is ideally suited for the quantitative absorption of oxygen from water and organic solvents.

Herrn Prof. Dres. mult.Viktor Gutmann, Institut für Anorganische Chemie der Technischen Universität Wien, mit besten Wünschen zur Vollendung des 65. Lebensjahres gewidmet.     

Ruthenium(III) catalyzed oxidation of hexacyanoferrate(II) by periodate in aqueous alkaline medium

Ruthenium(III) catalyzed oxidation of hexacyanoferrate(II) by periodate in alkaline medium is assumed to occurvia substrate-catalyst complex formation followed by the interaction of oxidant and complex in the rate-limiting stage and yield the products with regeneration of catalyst in the subsequent fast step. The reaction exhibits fractional order in hexacyanoferrate(II) and first-order unity each in oxidant and catalyst. The reaction constants involved in the mechanism are derived.     

Synthesis and ferromagnetic interaction in oxamido-bridged heterodinuclear copper(II)-chromium (III) complexes

Four μ- oxamido heterodinuclear complexes, [Cu (oxae) Cr (L)₂ ] (NO₃) ₃, where oxae denotes the N, N'bis (2-aminoethyl) oxamido dianion and L represents 1,10-phenanthroline (phen); 5-nitro-1,10-phenanthroline (NO_2-phen); 5-methyl-1, 10-phenanthroline (Me-phen) and 2, 2′-bipyridine (bpy), have been synthesized and characterized by elemental analyses, magnetic moments (at room temperature) and molar conductivity measurements and spectroscopy. It is proposed that these complexes have extended oxamido-bridged structures consisting of a copper (II) ion and a chromium (III) ion, which have a square planar environment and octahedral environment, respectively. The cryomagnetic properties of the [Cu(oxae)Cr(bpy)₂(NO₃)₃(1) and [Cu(oxae)Cr(phen)₂](NO₃)₃(2) complexes have been measured over the range of 4.2–300 K. The leastsquares fit of the experimental data based on the spin Hamiltonian, ? = - 2J?₁·?₂, the exchange integrals (J) were evaluated as +36.9 cm^?1 for 1 and +35.8 cm^?1 for 2. The reds have connived that the spin coupling between the adjacent copper (II) and chromium (III) ions through oxamido-bridge in both 1 and 2 is ferromagnetic.     

Equilibrium reactions network for the cis- or trans-bis(pyrazine)tetraammineruthenium(II/III) and ruthenium(II/III)-EDTA complexes

The electrochemical and spectroelectrochemical behavior of the binuclear and trinuclear complexes generated from the association of cis- or trans-[Ru(NH₃)₄(pz)₂]^3+/2+ (where pz represents pyrazine) and [RuEDTA(H₂O)]^2−/− complexes has been investigated in aqueous solution. Based on two sets of spectrophotometrically determined equilibrium constants and on the formal redox potentials, the complex network of equilibrium reactions involving mixed valence species has been elucidated.     

Cationic complexes of Eu(III) and Sr(II) with diphosphine dioxides in organic extracts

IR spectroscopy was used to study the structure and composition of Eu(III) and Sr(II) complexes formed by cation-exchange extraction of these metals from their aqueous nitrate solutions with dichlorethane solutions of mixtures of chlorinated cobalt(III) dicarbollide (CCD) as a superacid with diphenyldiphosphine dioxides containing a methyl (Me-DPDO), ethyl (Et-DPDO), or polyoxyethylene bridge between two phosphorus atoms of phosphine oxide groups. At molar ratios DPDO/CCD ≤ 1, [Eu(H₂O)_nL₄]³⁺ complexes are formed in organic phases, whereas with an excess of DPDO relative to CCD, Eu(NO₃)L ₄ ²⁺ complexes are formed, where L = Me-or Et-DPDO. Polyoxyethylenediphosphine dioxide forms anhydrous complexes of composition Eu:L = 1:1 and 1:2 with Eu(III) and outer-spheric complexes of composition Sr:L = 1:1 and 1:2 with Sr(II), where the organic ligand molecules envelop the hydrated Sr(H₂O) _n ²⁺ cation. The peculiarities of extraction of the complexes are explained based on data about their composition and structure.