Synthesis,Characterization, and Catalytic Application of Palladium Complexes Containing Indolyl-NNN-Type Ligands

In this study, a series of N-heterocyclic indolyl ligand precursors 2-Py-Py-IndH, 2-Py-Pz-IndH, 2-Py-7-Py-IndH, 2-Py-7-Pz-IndH, and 2-Ox-7-Py-IndH (L¹H-L⁵H) were prepared. The treatment of ligand precursors with 1 equivalent of palladium acetate affords palladium complexes 1–5. All ligand precursors and palladium complexes were characterized by NMR spectroscopy and elemental analysis. The molecular structures of complexes 3 and 5 were determined by single crystal X-ray diffraction techniques. The application of those palladium complexes 1–5 to the Suzuki reaction with aryl halide substrates was examined.     

Synthesis,Characterization, and Crystal Structures of Diruthenium Complexes Containing Bridging Salicylato Ligands

The thermal reaction of Ru₃(CO)₁₂ ( 1 ) with salicylic acid, in the presence of triphenylphosphine, pyridine, or dimethylsulfoxide, afforded the dinuclear complexes Ru₂(CO)₄(μ‐O₂CC₆H₄OH)₂L₂ ( 2 ) [L = PPh₃ ( 2a ). C₅H₅N ( 2b ); (CH₃)₂SO ( 2c )]. Complex 2b was further reacted with the aromatic dimmines 2,2′‐dipyridine or 1,10‐phenanthroline to give the cationic diruthenium complexes [Ru₂(CO)₂(μ‐CO)₂(μ‐O₂CC₆H₄OH)(N∩N)₂]⁺ ( 3 ) [(N∩N) = 2,2′‐dipyridine ( 3a ); 1,10‐phenanthroline ( 3b )], which were isolated as their tetraphenylborate salts. All five novel complexes were characterized spectroscopically and analytically. For 2a – 2b and 3a – 3b , single‐crystal X‐ray diffraction studies were also carried out.     

半夹心结构含1，2-二硫碳硼烷的铑配合物的合成以及结构表征

室温下,18-电子体系的半夹心铑配合物Cp*Rh(L)S₂C₂(B₁₀H₁₀)(L=4-ClCH₂-C₆H₄N (2a),4-CH₃SCH₂-C₆H₄N (2b))可以通过16-电子体系的半夹心铑配合物[Cp*Rh[₂C₂(B₁₀H₁₀)]与吡啶衍生物合成。化合物通过IR、¹H NMR和元素分析进行了表征,并用X-射线单晶衍射测定了配合物2a和2b的单晶结构。     

含二（二苯基膦）甲烷配体的钯—铑异双金属配合物的XPS能谱研究

研究了４种带ｄｐｐｍ〔二（二苯基膦）甲烷〕桥配体的钯－铑异双金属配合物的ＸＰＳ谱，得到了在配合物生成过程中Ｐｄ、Ｒｈ及Ｃｌ结合能的变化，揭示了它们所处的化学环境，解释了这４种配合物生成过程中所发生的配体迁移、氧化还原及金属－金属成键过程。     

Synthesis and Characterization of Some Ru(tmeda) Complexes Containing Chloride, Hydride, and Vinylidene Ligands

Summary.  The polymeric compound [Ru(cod)Cl₂] _x (cod = cyclooctadiene) reacts with 2 equivalents of tmeda (N,N,N′,N′-tetramethylethylenediamine) in refluxing MeOH to afford trans-[Ru(cod)(tmeda)(Cl)(H)] (1), which upon treatment with CHCl₃ is readily converted to the dichloro complex trans-[Ru(cod)(tmeda)Cl₂] (2). When [Ru(cod)Cl₂] _x is reacted with tmeda under an atmosphere of H₂ (3 bar), the bis-tmeda complex trans-[Ru(tmeda)₂Cl₂] (3) is obtained in 80% yield. DFT calculations revealed that 3 is by 52 kJ/mol more stable than the corresponding cis isomer. Attempts to prepare the coordinatively unsaturated complex [Ru(tmeda)₂Cl]⁺ by reacting 1 with TICF₃SO₃ were unsuccessful. According to DFT calculations, however, such a complex should be stable and, interestingly, should adopt a square pyramidal rather than a trigonal bipyramidal structure. If halide abstraction of 3 is performed in the presence of terminal alkynes HC*CR (R*t-Bu, n-Bu), the cationic vinylidene complexes [Ru(tmeda)₂(Cl)(*C*CHR)]⁺ (4a,b) are obtained. Received March 26, 2001. Accepted April 26, 2001     

新型含N-杂环卡宾二硫化碳配体的锰铼金属双核化合物的合成、表征及电化学性质简

合成了一系列含N-杂环卡宾二硫化碳加合物配体的锰铼金属有机化合物,其中包括3种单核化合物和3种双核化合物,对它们的结构进行了表征,并研究其反应性和电化学性质. 与三烷基膦二硫化碳配体相比,含N-杂环卡宾二硫化碳加合物配体的锰铼金属有机化合物展现出不同的反应特性. 研究结果表明,[MnRe(CO)6(μ-H){μ-CH3SC(S)IMes2}]配合物具有催化质子还原成氢气的能力.     

钒酰腙配合物的合成、结构及生物活性

以酰腙为配体钒的单核、双核配合物因其结构丰富、生物活性多样而引起广泛关注。目前该领域新配合物的合成、表征和生物活性的研究甚为活跃。本文回顾了近年来钒酰腙配合物的研究状况,主要从以下三个方面进行综述：(1)钒酰腙配合物的合成方法;(2)此类配合物的配位模式;(3)一些单、双核钒酰腙配合物抗变形虫,抗肿瘤,类胰岛素,抑制Na⁺, K⁺-ATP酶,与DNA作用的生物活性。文中着重阐述了钒酰腙化合物的结构和生物活性之间的关系。此外,还提出了钒酰腙配合物研究领域的不足之处并对其今后发展方向进行了展望。     

Cyclometalated Iridium(III) Complexes Containing Semicarbazone Ligands: Synthesis,Characterization, Photophysical and Biological Studies

The synthesis, crystal structure, photophysical properties, and biological activity of the novel bis‐cyclometalated complexes [Ir(ptpy)₂(vnsc)] ( 2 ) and [Ir(ptpy)₂(acsc)] ( 3 ) [ptpy = 2‐(p‐tolyl)pyridinato, vnsc = vanillin semicarbazone, acsc = acetone semicarbazone] are described. The new compounds were prepared by the reaction of [{Ir(μ‐Cl)(ptpy)₂}₂] ( 1 ) with the corresponding semicarbazone ligands under basic conditions. The molecular structure of compound 3 was confirmed by a single‐crystal X‐ray diffraction study. The complex crystallized from chloroform as a mono‐ solvate in the orthorhombic space group Pcab with eight molecules in the unit cell.     

Synthesis,Characterization, and Structure of Metal(II) (-)-Sparteine Complexes Containing Acetate Ligands

The complexes [Co(C₁₅H₂₆N₂)(C₂H₃O₂)₂] (1), [Ni(C₁₅H₂₆N₂)(C₂H₃O₂)₂] (2), [Cu(C₁₅H₂₆N₂)(C₂H₃O₂)₂] (3) and [Zn(C₁₅H₂₆N₂)(C₂H₃O₂)₂] (4) were prepared from reaction of (?)-sparteine with the corresponding metal(II) acetates in ethanol at stoichiometric ligand to metal ratios. The complexes were characterized by UV-Vis and IR spectroscopies, and magnetic susceptibility measurements. The solid-state structures of 1, 2 and 4 have been determined by X-ray crystallography. The Complexes 1 and 2 display a pseudo-octahedral structure around the metal center, where two acetate ligands coordinate to the metal center in a bidentate fashion, whereas the metal centers in 3 and 4 adopt a pseudo-tetrahedral structure and two acetate ligands in these complexes coordinate to the metal center in a monodentate fashion. The whole set of prepared complexes has been used for comparative structural and spectroscopic studies.     

Synthesis and Crystal Structures of Diiron Dithiolate Complexes Containing Diphosphine Ligands

As the active site model of [FeFe]-hydrogenases, complexes [(μ-PDT)Fe₂(CO)₅]₂(dppb) (PDT = SCH₂CH₂CH₂S, dppb = Ph₂PCH₂CH₂CH₂CH₂PPh₂) (1) and [(μ-SCH₂)₂NCH₂CO₂Me]Fe₂(CO)₅(dppm) (dppm = Ph₂PCH₂PPh₂) (2) were prepared by reactions of (μ-PDT)Fe₂(CO)₆ (A) or [(μ-SCH₂)₂NCH₂CO₂Me]Fe₂(CO)₆ (B) with dppb or dppm in the presence of the decarbonylating agent Me₃NO?2H₂O in MeCN at room temperature. Complex 1 was characterized by elemental analysis, IR, and ¹H (³¹P, ¹³C) NMR spectroscopic techniques. In addition, the molecular structures of 1 and 2 have been confirmed by single crystal X-ray diffraction analysis. In the crystal structure of 1, two phosphorus atoms of dppb reside in a basal position of the square-pyramidal coordination sphere of the Fe2 and Fe3 atoms. However, in the crystal structure of 2, P1 atom of dppm resides in an apical position of the square-pyramidal coordination sphere of the Fe2 atom.     

Synthesis and Structural Characterization of Four Zinc Complexes Containing 3,5‐Dimethylpyrazole and Carboxylate Ligands

Four new zinc(II) complexes Zn₂(μ‐dmpz)₂(Hdmpz)₂(L1)₂ ( 1 ) (Hdmpz = 3,5‐dimethylpyrazole, HL1 = 2‐methyl‐2‐phenoxypropanoic acid), Zn(Hdmpz)₂(L2)₂ ( 2 ) [HL2 = 2‐hydroxy‐5‐(phenyldiazenyl)benzoic acid], Zn₂(μ‐dmpz)₂(Hdmpz)₂(L3)₂ ( 3 ) [HL3 = 3,4‐(methylenedioxy)benzoic acid], and Zn₂(μ‐dmpz)₂(Hdmpz)₂(L4)₂ ( 4 ) [HL4 = 3‐(4‐methoxyphenyl)acrylic acid] were prepared and structurally characterized by different techniques including elemental analysis, IR spectroscopy, and single‐crystal X‐ray diffraction analysis. The X‐ray studies suggested that all these complexes except compound 2 are centrosymmetric dinuclear complexes with a tetrahedral arrangement around each zinc ion, whereas compound 2 is a mononuclear complex. The pyrazole ligand is coordinated in both terminal as well as a bridging fashion in the dinuclear moiety, whereas the pyrazole ligand in compound 2 is coordinated only in monodentate terminal fashion with its neutral nitrogen group. In all four complexes the carboxylate functions behave as monodentate ligands. All complexes show intramolecular hydrogen bonding of N–H ··· O between N–H of pyrazole and nonbonded oxygen atom of carboxylate. Furthermore, rich intermolecular weak interactions such as classical hydrogen bonds, C–H ··· O, C–H ··· N, C–H ··· π, and CH₃–π interactions exist and complexes 1 – 4 display a set of 3D superamolecular frameworks. In addition, the four compounds are thermally stable below 150 °C.     

Synthesis and Characterization of Novel Orange-emitting Iridium(III) Complexes with Diphenylquinoline Ligands Containing Fluorinated Substituent

Recently, the iridium complexes as phosphorescent emitter in organic light-emitting diodes (OLEDs) have attracted much attention since the realization of a high efficiency OLED device based on the complex fac tris(2-phenylpyridine)iridium [Ir(ppy)3]1-4. T…     

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.     

新型含氮配体多核铜配合物的合成、晶体结构及其性能研究

以1,10-邻菲罗啉(phen)为配体,采用溶剂蒸发法在水中分别合成了羟基桥连和氯离子桥连的两个新型的含氮配体多核铜离子配合物[Cu4(phen)4(H2O)2(OH)4·(NO3)4·2H2O(1)和Cu2(phen)2Cl4(2)],其结构经元素分析和X-射线单晶衍射表征。1属三斜晶系,空间群P-1,晶胞参数a=10.143 0(9),b=11.900 1(11),c=12.629 9(13),α=111.060(2)°,β=91.070 0(10)°,γ=110.920(2)°,Z=1,V=1 309.8(2)3,F(000)=692。2属单斜晶系,空间群Cc,晶胞参数a=9.860 9(8),b=17.852 9(13),c=13.412 3(15),β=106.583(11)°,Z=4,V=2 263.0(4)3,F(000)=1 256。用荧光光谱和热分析分别研究了1和2的荧光性质和热稳定性,结果表明:在310 nm激发波长激发下,与phen相比,1和2的荧光发射峰分别发生红移和蓝移,λem分别位于451 nm和374 nm。1和2的初始分解温度分别为298℃和300℃。     

新型偶氮苯金属配合物的合成与性能

合成了新型偶氮苯金属配合物。分别采用光谱分析、热分析及X射线衍射测试技术对产物进行了表征和测试。结果表明,连接偶氮苯和金属配合物之间碳链的长度对该化合物的相转变和荧光特性具有特殊的影响。该系列化合物在紫外光和热作用下具有99%以上的偶氮苯顺-反异构化反应效率;具有290和560 nm这2个波段的荧光发射光谱。由其中1个金属配合物分散在聚甲基丙烯酸甲酯网络而形成的介质可作为全息信息存储材料而实现全息图像的写入和读出。     

The Synthesis and Characterization of Some New Thioether-Imidazole Containing Ligands

Procedures are described involving a convenient condensation of 4(5)-hydroxymethylimidazole or 5-methyl-4-hydroxymethyliraidazole with several thiols. The main step, the condensation reaction in refluxing acetic acid, is essentially the same for all ligands.     

Synthesis and Characterization of Heteropoly Coordination Compounds Containing Optical Ligands

ＴｈｅｈｅｔｅｒｏｐｏｌｙａｎｉｏｎｐｈａｓｅｔｒａｎｓｆｅｒｃｈｅｍｉｓｔｒｙｃｒｅａｔｅｄｂｙＰｏｐｅＭ .Ｔ .ｉｎ 1 984ｈａｓｏｐｅｎｅｄｕｐａｎｅｗｆｉｅｌｄｆｏｒｈｅｔｅｒｏｐｏｌｙｃｏｍｐｏｕｎｄｒｅｓｅａｒｃｈ[1— 3] .Ｂｕｔｓｕｂｓｔｉｔｕｔｉｎｇｃｏｏｒｄｉｎａｔｉｏｎｗａｔｅｒｍｏｌｅｃｕｌｅｓｂｙｏｒｇａｎｉｃｏｐｔｉｃａｌｌｙａｃｔｉｖｅｌｉｇａｎｄｈａｓｎｏｔｂｅｅｎｒｅｐｏｒｔｅｄｉｎｌｉｔｅｒａｔｕｒｅｓｕｎｔｉｌ 1 997[4] .Ｔｈｉｓ ｐａｐｅｒｃｏｖｅｒｓｓｉｘｈｅｔ…     

Synthesis,Characterization, and Properties of Tetraphenylethylene-Based Tetrakis-NHC Ligands and Their Metal Complexes

The development of highly emissive dinuclear Ag^I or Au^I complexes [M₂L](PF₆)₂ (L= 2 a , 2 b ; M=Ag, Au) derived from tetraphenylethylene (TPE)-based tetrabenzimidazolin-2-ylidene ligands is reported. The new complexes exhibit a remarkable fluorescence enhancement compared to their parent benzimidazolium salts. The quantum yield (Φ_F) value for salt H₄- 2 a (PF₆)₄ in dilute solution (c=10⁻⁵ m ) was found to be less than 1 %, whereas its metal complexes show Φ_F values up to 55 % at similar solution concentration. This observation can be attributed to the rigidification of the TPE skeleton upon metalation resulting in a restriction of the intramolecular rotation of the phenyl groups. Functionalization of the complexes [M₂ 2 b ](PF₆)₂ (M=Ag, Au) with terminal coumarin groups and subsequent photoirradiation yielded the complexes [M₂ 3 b ](PF₆)₂ (M=Ag, Au) bearing a new type of ligand with an unaffected TPE moiety.