A New Dinuclear Cu（Ⅱ） Complex of a Ligand with Benzimidazole Group - Synthesis and Crystal Structure

A new dinuclear copper complex, [Cu（C9H11N3）Cl2]2（C18H22Cl4Cu2N6）, has been synthesized and characterized by X-ray structure determination. It crystallizes in the triclinic P1^- space group with a = 7.526（3）, b = 9.473（4）, c = 9.535（3）A, α = 117.214（10）, β = 108.251（9）, γ = 91.560（6）°, V = 562.3（4）A^3, Z = 1, Mr = 591.30, F（000） = 298, Dc = 1.746 g/cm^3, μ（MoKα） = 2.385 mm^-1, the final R = 0.0577 and wR = 0.1248 for 2188 unique reflections with 1629 observed ones （Ⅰ〉 2σ（Ⅰ））. In the title complex, each copper（Ⅱ） atom is located at the center of a distorted trigonal bipyramid of five coordination atoms （two nitrogen and three chlorine atoms）. Two copper（Ⅱ） atoms were bridged by two chlorine anions （Cl（2） and Cl（2a）） to form a Cu（Ⅱ）-Cu（Ⅱ） binuclear entity with the distance between two copper（Ⅱ） atoms of 3.398 （A）.     

Synthesis and Characterization of a New Symmetric Dinucleating Ligand and Its Dizinc(Ⅱ)Complex with Alkoxo and Carboxylate Bridges

<正>A novel dinuclear zinc(Ⅱ)complex[Zn_2L(μ-OAc)](PF_6)_2(CH_3OH)has been synthesized from a new symmetrical compartmental ligand HL in which the pendant arms,bearing pyridyl groups,are bridged by 1,3-diaminopropan-2-ol.X-ray crystal structure shows that the two zinc atoms reside within the adjacent ligand compartments and are bridged by the endogenous alkoxo-O from ligand and one exogenous carboxylate from acetate with a syn-syn mode.The coordination geometry of two zinc atoms is a distorted trigonal bipyramid with the pyridyl-N atoms and bridging alkoxo-O atom providing the equatorial donor set.Such coordination geometry observed in this complex is similar to that found in the dinuclear unit of phospholipase C.     

Synthesis and Crystal Structure of a New Dinuclear Manganese （Ⅱ） Manganese （Ⅲ） Complex of a Macrocyclic Ligand

IntroductionIn recentyears many efforts have been devotedto the preparation and characterization of pendant-arm macrocyclic complexes due to the fact that theligating groups attaching to the macrocyclic skele-ton can offer additional donor groups to maintainthe coordination sphere of metal centers in themacrocycles[1,2 ] .In this way,functionalised pen-dant- arm macrocyclic complexes have been de-signed and prepared so as to mimic the structureand properties of certain metalloenzymes and met-a…     

Dinuclear Copper（Ⅱ） Complex with a New Polycarboxylate Ligand：Syntheses,Characterization and Crystal Structure

A dinuclear copper(Ⅱ) complex,[Cu2(HL)2(H2O)6] 1(H3L = 2,4,6-tri(3-carboxy-phenylthio)-1,3,5-triazine),was synthesized hydrothermally and characterized by single-crystal X-ray diffraction,IR and thermal analysis.Single-crystal X-ray diffraction reveals that complex 1 is a dinuclear copper(Ⅱ) complex,which is further extended to a 3D network by weak interactions such as O…H-O hydrogen bonds and noncovalent S...S interactions.The crystal of compound 1 belongs to monoclinic,space group C2/c,with a = 50.15(2),b = 6.789(3),c =15.667(8) ,β = 90.588(9)o,V = 5334(4) 3,Z = 4,C48H38Cu2N6O18S6,Mr = 1306.28,Dc = 1.627 g/cm3,F(000) = 2664,Rint = 0.0631,T = 293(2) K,μ = 1.112 mm-1,the final R = 0.0661 and wR = 0.1850 for 3782 observed reflections with I > 2σ(I).     

Synthesis and Structure of a New Dimanganese Complex [Mn2（μ-OAc）2（phen）4]（ClO4）2

1INTRODUCTION Manganese complexes have drawn considerable interests in recent years because they can serve as models for active sites of manganese-containing me-talloenzymes,such as photosystem II(PSII),man-ganese superoxide dismutase(MnSOD),manganese ribonucleotide reductase(MnRR)et al[1].The binu-clear manganese enzymes,including catalase,MnRR and arginase,were indicated to have carboxylato-,oxo-,hydroxo-or aquo-bridged cores[2~4].Structures with Mn substituted into the iron ribon…     

Syntheses, Crystal Structures and Magnetic Properties of a New Nitronyl Nitroxide Radical and Its Cu（II） Complex

A new compound （NIT-mNO2 = 4,4,5,5-tetramethylimidazoline-2-yl-（2＇-chlor-5＇- nitrophenyl）-3-oxide-l-oxyl） 1 and its complex （Cu（NIT-mNO2）（hfac）2） 2 have been synthesized and structurally and magnetically characterized. Complex 1 crystallizes in monoclinic, space group P211n with a = 10.6798（9）, b = 11.2705（9）, c = 12.9559（10）A, β = 107.3770（10）°, V = 1488.3（2） A^3, C13H15ClN3O4, Mr = 312.73, Z = 4, Dc = 1.396 g/cm^3, g（MoKa） = 0.276 mm^-1, F（000） = 652, the final R = 0.0606 and wR = 0.1773 for 3405 independent reflections with Rint = 0.0203. The nitronyl nitroxide unit （imidazoline ring） is not coplanar with the phenyl ring with the dihedral angle between them of 55.75°. The compound results in a 1-D zig-zag chain structure by intermolecular H-bond interaction. Compound 2 crystallizes in triclinic, space group Pi with a = 10.3699（10）, b = 10.6286（11）, c = 15.1683（15）A, a = 77.5330（10）, ,β = 773080（10）, y = 87.3420（10）＊, V = 1592.5（3） A^3, C23HITCIFI2N3O8Cu, Mr = 790.39, Z = 2, Dc = 1.648 g/cm^3, μ（MoKa） = 0.888 mm^-1, F（000） = 788, the final R = 0.0793 and wR = 0.2153 for 5794 independent reflections with Rint = 0.0196. The Cu（Ⅱ） ion is located at a center of symmetry, and each Cu（Ⅱ） is surrounded by six oxygen atoms at the vertices of a distorted tetragonal octahedron. Four of the six oxygen atoms belong to two hfac ligands and occupy the equatorial coordination sites, while the other two of NIT-mNO2 act as μ-1,5 bridge between the Cu（Ⅱ） ion, thus forming a 1-D chain structure. The magnetic susceptibility data indicate intermolecular antiferromagnetic interactions between compound 1 and intrachain ferromagnetic behaviors.     

Synthesis, Structure and Magnetic Properties of a Linear Trinuclear Mn（II） Complex with a Multifunctional Group Ligand

By use of a new ligand containing both salicylic acid moiety and salicylaldehyde Schiff base moiety, 5-(2-hydroxybenzylideneamino)-2-hydroxybenzoic acid (H3L), a linear trinuclear Mn(II) complex was prepared. This complex crystallizes in triclinic, space group P1 with a = 12.0196(7), b = 13.7440(13), c = 15.7554(14) , α = 111.529(3), β = 96.691(2), γ = 94.802(2)o, C96H100Mn3N6O32, Mr = 2014.64, V = 2382.0(3) 3, Z = 1, μ = 0.478, Dc = 1.404 g/cm3, F(000) = 1049, R = 0.0554 and wR = 0.1610 for 8973 observed reflections (I 2σ(I)). The complex consists of a trinuclear cluster and two solvate ethanol molecules. Three linearly disposed Mn atoms, with an inversion center on the central one, are bridged by six carboxylate groups from six bulky mono-anionic ligands (H2L–), and the octahedral coordination spheres for each of the metal centers are thus formed, with the aid of additional ligation of two small molecules (ethanol and water) to both ends. The magnetic properties of the title complex are also included in this paper.     

Hydrothermal Synthesis, Crystal Structure and Thermal Analysis of a Dinuclear Complex Cd2（3,5-Dinitrobenzoate）4（pyridine）4

A dinuclear complex Cd2(dnba)4(pyridine)4 (dnba = 3,5-dinitrobenzoate) has been synthesized by hydrothermal method and characterized by X-ray single-crystal diffraction, elemen- tal analysis, FT-IR spectroscopy, DSC and TG-DTG techniques. The complex with empirical formula C48H32Cd2N12O24 (Mr = 692.83) crystallizes in monoclinic, space group P21/n with a = 12.0344(14), b = 10.5752(13), c = 21.578(3) (A), β = 104.150(2)o, V = 2662.8(6) (A)3, Z = 2, Dc = 1.728 g/cm3, μ(MoKα) = 0.897 mm-1, F(000) = 1384, S = 1.016 and (Δ/σ)max = 0.001. R = 0.0638 and wR = 0.0737 for all data; the final R = 0.0337 and wR = 0.0644. In this complex, four carboxylates are bidentate- or chelate-coordinated with the Cd(Ⅱ) centers to give the dinuclear structure. The other coordination positions of Cd(Ⅱ) are occupied by the lone pair electrons from N of four pyridines. Thermal analyses DSC and TG-DTG have been used to determine the thermal decomposition mechanism of the title complex.     

Synthesis and Crystal Structure of a Co（II） Coordination Polymer Derived from a Flexible Bipyridyl Derivative Ligand

1 INTRODUCTION The infinite networks constructed from transition metal complexes have attracted considerable current interest in recent years. The motivation behind this activity has been stimulated by their potential appli- cations in selective inclusion of ions, molecular re- cognition, host-guest chemistry, ion exchange, cata- lysis, electrical conductivity, magnetism, optics and so on[1～4]. It is well known that the diversity in structures and topologies of supramolecules is attri- b…     

Synthesis and Characterization of Complexes of Copper(II), Nickel(II) and Cobalt(II) with vic-Dioximes Bearing N''-p-Aminobenzoyl Benzaldehyde Hydrazone

Six different arylhydrazone derivatives of p-aminobenzoic hydrazide of vic-dioximes were synthesized by reaction of chloroglyoxime and dichloroglyoxime with N＇-p-aminobenzoyl benzaldehyde, 4-hydroxybenzaldehyde and 4-methoxybenzaldehyde hydrazones, respectively. Metal-ligand （1 ： 2） complexes of vic-dioxime derivatives with Cu（Ⅱ）, Ni（Ⅱ） and Co（Ⅱ） were prepared from corresponding metal acetates. The ligands and their complexes were characterized on the basis of elemental analyses and spectral data. The complexing abilities of these new vic-dioximes toward transition metals of Co（Ⅱ）, Cu（Ⅱ）, Ni（Ⅱ）, Zn（Ⅱ）, Cd（Ⅱ）, Mn（Ⅱ） and Cr（Ⅲ） were determined by solid-liquid extraction studies.     

Microwave Synthesis, Characterization and DNA-binding Properties of a New Cobalt（ Ⅱ ） Complex with 2,6-Bis（benzimidazol-2-yl）pyridine

A new cobalt(Ⅱ) complex with tridentate ligand 2, 6-bis (benzimidazol-2-yl)pyridine has been synthesized by microwave irradiation method and characterized by elemental analysis,electrochemical and spectral methods. The binding of the complex with calf thymus DNA has also been investigated by absorption and fluorescence spectra.     

Synthesis and Crystal Structure of a Dinuclear Compound Cu2[（O=PPh2）2N]2（μ-O2PPh2）2

1 INTRODUCTION Transition-metal complexes supported by poly-dentate phosphine ligands have been widely studieddue to the unique photophysical properties andpotential applications as industrial catalysts, mole-cular sensors and drugs[1~3]. As known, oxidation ofphosphine ligands could happen in the synthesisreaction to result in novel complex with unexpectedstructure[4, 5]. For example, the structure of complexFe((OPPh2)2N)3[6] is an octahedral tris-chelate arrange-ment of the oxidized a…     

Synthesis, Characterization, Crystal Structure and Antibacterial Activities of a Nickel（Ⅱ） Complex with 2＇-（2-Thienylidene）-hydroxybenzoylhydrazide

In the ethanol solvent, a nickel(Ⅱ) complex Ni(C12H10N2O2S)2 upon reaction of 2'-(2-thienylidene)-hydroxybenzoylhydrazide with nickel acetate was synthesized, and its structure was characterized by IR, UV, elemental analysis and X-ray diffraction analysis. The crystal belongs to monoclinic system, space group C2/c with a = 22.052(3), b = 5.9681(6), c = 18.522(2) (A), β = 110.679(4)° , V = 2280.6(4) (A)3, Z = 4, Mr = 551.27, μ = 1.606 mm-1, Dc = 1.075 g/cm3, F(000) = 1136 and Rint = 0.0556. The nickel(Ⅱ) atom in the compound is four-coordinated with two nitrogen atoms from amide and two oxygen atoms from keto group. The biological activities have been measured, show- ing the compound exhibits better anti-bacterial activity than the ligand.     

Synthesis and Structural Characterization of Pd[CH3O（O）C6H3CHNNC（S）NH2]（C5H5N）

1 INTRODUCTION Palladium (Ⅱ) coordination and organometallic compounds usually show square planar environments at the metal center[1], and have experienced an im- portant development in the past years due to their acting as intermediates in different types of catalytic reactions and numerous applications in organic synthesis[2]. Although palladium plays an increase- ingly recognized role as a biometal[3], little is known about the structure and function of palladium compounds in living …     

Synthesis, Crystal Structure and Characterization of α-（1-Benzimidazolyl） -hypnone Cobalt（Ⅱ） Complex： [CoCl （ C7H5N2CH2COPh）4] Br

The crystal structure of [CoCl ( C7H5N2CH2COPh)4] Br has been determined by means of X-ray crystallography. The molecular structure consists of a discrete [CoCl ( C7H5N2CH2COPh)4] ^ cation and one Br^- anion, in the [CoCl ( C7H5N2CH2COPh)4]^ cation, the coordination geometry of the central Co atom is square-pyramidal with four tertiary N atoms of benzimidazole from four α-( benzimidazol-1-yl) -hypnone ligands in the basal position and one chloride anion in the apical position. In the solid state, [CoCl ( C7H5N2CH2COPh)4]^ and Br^- anion possess intermolecular and intramolecular interactions, which stabilize the crystal structure. The characterization of the title compound were also carried out by using elemeutal analysis, FTIR, UV spectrometries and TG-DSC.