Synthesis and Physicochemical Properties of Some Transition Metal Complexes with 3-Hydroxypyridine

The complexes ML₂ · 2H₂O and CrL₃ · 8H₂O were synthesized by the reaction of Cu(II), Ni(II), Co(II), Cd(II), and Cr(III) nitrates with 3-hydroxypyridine (HL) and identified. The spectroscopic characteristics of neutral, anionic, and cationic forms of the ligand were determined. It was shown that 3-hydroxypyridine enters the complex as an anion to give polymeric chains due to the ligand coordination through the N and O atoms. Complexation of copper, cobalt, and chromium nitrates with 3-hydroxypyridine in ethanol solutions was studied, and the formation constant of the copper complex was calculated. It was found that Cu(II) and Cr(III) complexes are formed in the solid state and in solutions (M : L = 1 : 2 and 1 : 3, respectively; in the case of Cu(II), the M : L ratio is 1 : 3).     

喹喔啉—2,3—二甲酰胺与3d过渡金属配合物的合成及性质研究

首次合成了喹喔啉－２，３－二甲酰胺（Ｑｘｄａ）与３ｄ过渡金属的三种固体配合物：Ｍ（Ｑｘｄａ）２ｃｌ２（Ｍ＝Ｃｏ（Ｉ），Ｎｉ（Ｉ），Ｃｕ（Ⅱ）。通过元素分析，摩尔电导，红外光谱，电子光谱，磁化率，热分析等手段对配合物的组成和性质进行了研究。     

Synthesis and Structural Characterization of Divalent Transition Metal Alkynylamidinate Complexes

A series of new alkynylamidinate complexes of selected first and second row transition metals has been synthesized and fully characterized. Treatment of MCl₂ precursors (M=Mn, Fe, Co) with 2 equiv. of the lithium alkynylamidinates Li[c-C₃H₅−C≡C−C(NR′)₂] ⋅ THF (R′=ⁱPr (2), Cy (cyclohexyl) ( 2 )) afforded a series of binuclear complexes of the type M₂[c-C₃H₅−C≡C−C(NR)₂-κN:κN′]₂[c-C₃H₅−C≡C−C(NR)₂-κ²N,N′]₂ ( 3 : M=Mn, R=Cy; 4 a : M=Fe, R=ⁱPr; 4 b : M=Fe, R=Cy; 5 : M=Co, R=ⁱPr) with no significant metal-metal bonding. In marked contrast, a similar reaction of CrCl₂ with 2 equiv. of 1 afforded the homoleptic dinuclear chromium(II) complex Cr₂[c-C₃H₅−C≡C−C(NⁱPr)₂-κN:κN′]₄ ( 6 ) which supposedly comprises a Cr−Cr quadruple bond. Complex 6 could also be prepared in a more rational way and in better yield (61 %) by using dichromium(II) tetraacetate, Cr₂(OAc)₄, as starting material. Related reactions employing dimolybdenum(II) tetraacetate, Mo₂(OAc)₄, and 2 or 3 equiv. of 1 afforded the mixed-ligand paddle wheel-type complexes trans-Mo₂(OAc-κO:κO′)₂([c-C₃H₅−C≡C−C(NⁱPr)₂-κN:κN′]₂ ( 7 ) and Mo₂(OAc-κO:κO′)([c-C₃H₅−C≡C−C(NⁱPr)₂-κN:κN′]₃ ( 8 ). All title compounds were structurally characterized through single-crystal X-ray diffraction and spectroscopic techniques (NMR, IR, Raman).     

吗啉双胍配合物的合成和EPR研究

本文报道了十三种新的吗啉双胍配合物的合成、性质及结构特征。     

1,4,7-三氮杂环癸烷过渡金属配合物的合成与结构表征

以十元环大环三胺配体1,4,7-三氮杂环癸烷(tacd)为主配体,分别与钴、镍、铜和锌的顺丁烯二酸盐和己二酸盐进行反应,得到了8种含有双大环的单核配合物,利用元素分析,红外光谱以及热重分析等手段对它们的结构进行了表征.结果表明这八种配合物具有类似的配位结构.     

Synthesis, Characterization and Antibacterial Activity of Some Transition Metal cis-3,7-dimethyl-2,6-octadiensemicarbazone Complexes

The synthesis and characterization of some transition metal cis-3,7-dimethyl-2,6-octadiensemicarbazone (CDOSC) complexes are reported. The ligand CDOSC yields: [ML₂ Cl₂] and [ML₂ Cl₂] Cl type complexes, where M = Cr^III, Mn^II, Fe^III, Co^II, Ni^II, Cu^II, Zn^II, Cd^II and Hg^II, L = CDOSC. Structures of the complexes were determined using elemental analysis, molar conductivity, magnetic measurements, i.r. and electronic, as well as n.m.r spectra. CDOSC acts as a bidentate ligand in all the complexes. All the newly synthesized metal complexes, as well as the ligand, were screened for their antibacterial activity. All the complexes exhibit strong inhibitory action against Gram (+) bacteria Staphylococcus aureus and Gram (−) bacteria Escherichia coli. The antibacterial activities of the complexes are stronger than those of the ligand CDOSC itself.     

含二茂铁基Schiff碱及其过渡金属配合物的合成与表征

合成了两个新型含有二茂铁基的schiff碱配体及其8种过渡金属配合物,并通过^1HNMR,IR,元素分析,热分析和摩尔电导对其结构进行表征,提出了配合物的可能结构。     

西佛碱型大环多胺过渡金属配合物的合成与表征

西佛碱型大环多胺过渡金属配合物的合成与表征     

Synthesis and Spectral Characterization of Some Transition Metal Complexes Containing Pentadentate SNNNS Donor Heterocyclic Schiff Base Ligands

A new Schiff base, 2,6-diacetylpyridine bis(3-methylsulfhydryl-4-amino-5-mercapto-1,2,4-triazole) (DPMAMT) is designed and synthesized by the condensation of 2,6-diacetylpyridine with 3-methylsulfhydryl-4-amino-5-mercapto-1,2,4-triazole, and structurally characterized. Copper(II), cobalt(II), nickel(II), manganese(II), zinc(II), cadmium(II) and oxovanadium(IV) complexes of DPMAMT have been prepared for the first time, and characterized on the basis of elemental analyses, conductance measurements, magnetic properties, spectral (i.r., ¹H-n.m.r., u.v.–vis., e.p.r. and FAB-mass) and thermal studies. The complexes exhibit an octahedral geometry around the metal center. The pentadentate behavior of the ligand was confirmed on the basis of spectral studies.     

氮支冠醚二硫代甲酸根过渡金属配合物的合成和性质

氮支冠醚二硫代甲酸根过渡金属配合物的合成和性质     

Synthesis and Spectroscopic Characterization of Transition Metal Complexes of Maleionitriledithiolate and 5-Nitro-Phenanthroline

The dithiolenes and diimines and their metal complexes are an important research field in the organic and coordination chemistry^[1-3]. Transition metal complexes of a dithiolene and a diimine have excellent electronic functions due to the intramolecular charge transfer from a ligand to other ligand (LL'CT)^[3], in which are interested authors^[4,5]. Recently we have been studied in detail the synthesis and properties of the title complexes M(mnt)(5-NO₂-phen), M=Mn^Ⅱ, Fe^Ⅱ, Co^Ⅱ, Ni^Ⅱ, Cu^Ⅱ, Zn^Ⅱ. The structure and properties of the M(mnt)(5-NO₂-phen) were characterized by the elemental analysis, TDA-TG, MASS, IR, UV-Vis, fluorescence and EPR spectra,molar conductivity and magnetic susceptibility. In the present abstract we report only the synthesis and spectroscopic characterization of these complexes.     

Synthesis, Characterization, and Electrochemical Properties of a Novel Macrocylic Ligand and its Transition Metal Complexes

 2,3-Dibromo-6,7,13,14,15,16,22,23-octahydro-14,15-bis-(hydroxyimino)-tribenzo [e,k,q][1,4,7,10,13,16]tetraoxadiazacyclohexadecine (LH₄) was prepared by condensation of 1,2-bis-(2′-aminophenoxyethoxy)-4,5-dibromobenzene with cyanogen-di-N-oxide. Mono-, di-, and trinuclear transition metal complexes of this ligand ((LH₃)₂Ni, (LH₃)₂Zn, (LH₃)₂Co, (LH₃)₂Cu, (LH₃)₂Fe, (LH₃)₂(UO₂)₂(OH)₂, (LH)₂Cu₃, (LH)₂Co₃) were synthesized under basic conditions. The electrochemical properties of the mono- and dinuclear complexes were studied by cyclic voltammetry in DMSO solution containing TBAP. The results showed that all redox processes are based on the metal center and the oxime ligands stabilize the Ni(III), Fe(III), Co(III), and Cu(III) species formed during oxidation. The Fe(II) and U(VI)O₂ complexes displayed a different behaviour: a reduction peak with the corresponding anodic signal during the reverse scan was observed. The oxime moiety also stabilizes U(V)O₂ which forms during the reduction process of the uranyl complex. Cu(II) was adsorbed on the electrode surface upon scanning cathodically.     

Synthesis,Characterization, and Electrochemical Properties of a Novel Macrocylic Ligand and its Transition Metal Complexes

Summary.  2,3-Dibromo-6,7,13,14,15,16,22,23-octahydro-14,15-bis-(hydroxyimino)-tribenzo [e,k,q][1,4,7,10,13,16]tetraoxadiazacyclohexadecine (LH₄) was prepared by condensation of 1,2-bis-(2′-aminophenoxyethoxy)-4,5-dibromobenzene with cyanogen-di-N-oxide. Mono-, di-, and trinuclear transition metal complexes of this ligand ((LH₃)₂Ni, (LH₃)₂Zn, (LH₃)₂Co, (LH₃)₂Cu, (LH₃)₂Fe, (LH₃)₂(UO₂)₂(OH)₂, (LH)₂Cu₃, (LH)₂Co₃) were synthesized under basic conditions. The electrochemical properties of the mono- and dinuclear complexes were studied by cyclic voltammetry in DMSO solution containing TBAP. The results showed that all redox processes are based on the metal center and the oxime ligands stabilize the Ni(III), Fe(III), Co(III), and Cu(III) species formed during oxidation. The Fe(II) and U(VI)O₂ complexes displayed a different behaviour: a reduction peak with the corresponding anodic signal during the reverse scan was observed. The oxime moiety also stabilizes U(V)O₂ which forms during the reduction process of the uranyl complex. Cu(II) was adsorbed on the electrode surface upon scanning cathodically. Received August 20, 2001. Accepted (revised) October 17, 2001     

Synthesis and Characterization of Transition Metal

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IIB族金属二硫代氨基甲酸配合物的合成、表征及热稳定性研究

在甲醇溶液中合成了一系列IIB过渡金属Zn(II), Cd(II)的二羟乙基二硫代氨基甲酸[(EtOH)₂dtc]的配合物, 并对配合物M[(EtOH)₂dtc]₂L [M＝Zn (1), Cd (2), L＝2,2'-联吡啶; M＝Zn (3), Cd (4), L＝邻菲啰啉]进行了红外光谱、元素分析、热重分析表征工作. 热重分析表明配合物1～4中DTC配体比中性配体更易失去, 热分解最终产物为相应的氧化物. 对化合物1, 2做了X-ray单晶衍射分析, 1为单斜晶系, P2₁/c空间群, 晶胞参数a＝0.72146(5) nm, b＝2.61720(18) nm, c＝1.59438(11) nm,b＝97.899(2)°, V＝2.9820(4) nm³, Z＝4, m＝1.133 mm^－1, D_c＝1.297 Mg•m^－3; 2为三斜晶系, P-1空间群, 晶胞参数a＝1.0075(2) nm, b＝1.1580(2) nm, c＝1.1777(2) nm, a＝70.92(3)°, b＝85.71(3)°, γ＝81.02(3)°, V＝1.2822(4) nm³, Z＝2, m＝2.118 mm^－1, D_c＝1.630 Mg•m^－3.     

多二茂铁基二氮杂己烷及其过渡金属配合物的合成

乙二胺与二茂铁甲醛或双二茂铁甲基氟硼酸盐反应，合成了１，６－二（二茂铁基）－２，５－二氮杂己烷和１，１，６，６－四（二茂铁基）－２，５－二氮己烷，它们与过渡金属（Ｆｅ＾２＋，Ｃｏ＾２＋，Ｎｉ＾２＋，Ｃｕ＾２＋，Ｚｎ＾２＋）盐在乙醇或乙醇－二氯甲烷中反应，是１４种过渡金属配合物，对这些化合物进行了表征，二种配体及其铜配合物用作复合固体推进剂的燃速调节剂时，基本不迁移，而燃速催化效率均超过辛基二茂铁。     

Synthesis and Structure of Hetropolyoxometal-supported Transition Metal Complexes

The chemistry of metal-oxo compounds has been extensively and intensively studied for over a hundred years because of their theoritical importance and practical application^[1]. Recent advance has afforded a study of inorganic or organometallic complexes containing metal-oxo anions^[2]. Herein, the synthesis and structural characterization of two heteropolyoxomolybdnum-supported transition metal complexes (H₂bpy)_0.5Ni(H₂O)₅[Mo₅P₂O₂₃]Ni(Hbpy)(H₂O)₄ (1) and (H₂bpy)_0.5Co(H₂O)₅[Mo₅P₂O₂₃]Co(Hbpy) (H₂O)₄(2) are reported.     

双安息香缩三乙四胺双核过渡金属配合物的合成、表征与载氧性质

合成了双安息香缩三乙四胺及其与草酸共同配位的Co(Ⅱ)、Ni(Ⅱ)、Cu(Ⅱ)、Zn(Ⅱ)、Cd(Ⅱ)的三元双核金属配合物.经质谱、红外光谱、元素分析、摩尔电导与磁矩测定及热分析等方法表征.用气体吸收装置探讨了配合物在DMF溶剂中的载氧性质和载氧动力学.     

Synthesis and Some Properties of Transition Metal Complexes with Octa(sulfophenyl)tetrapyrazinoporphyrazine

Sulfonation of metal complexes of octaphenyltetrapyrazinoporphyrazine gave water-soluble octasulfoderivatives. The complexes synthesized were studied by EPR, ¹H NMR, electronic, and IR spectroscopy. It was found that, unlike complexes of other porphyrins and porphyrazines, this nickel complex is paramagnetic, whereas the cobalt complex gives no EPR signal. The cobalt complex can reversibly bind an oxygen molecule.__________Translated from Koordinatsionnaya Khimiya, Vol. 31, No. 5, 2005, pp. 545–549.Original Russian Text Copyright © 2005 by Shishkin, Kudrik, Shaposhnikov.     

Synthesis and Spectroscopic Characterization of Transition Metal Complexes of Maleionitriledithiolate and 4,4'-Dimethano-2,2'-bipyridine

Transition metal complexes with a tetragonal planar structure of a dithiolene and a diimine have excellent electronic functions due to the intramolecular charge transfer from a ligand to other ligand (LL'CT)^[1-3]. Our interest is in the metal complexes of the dicyno-dithiolene and some diimine such as substituted and unsubstituted phenanthrolines and bipyridines. In the present work we studied synthesis, characterization, photo-physical and photochemical properties of the title complexes M(mnt)(dmbpy),M=Mn^Ⅱ,Fe^Ⅱ,Co^Ⅱ, Ni^Ⅱ, Cu^Ⅱ,Zn^Ⅱ.