Synthesis and Crystal Structure of a Novel Binuclear Cu（ Ⅱ ） Complex with Tetradentate Schiff-base Ligand

1 INTRODUCTION Many metalloenzymes containing in their active sites two copper ions that operate cooperatively occur in plants and animals. They are utilized for dioxygen transport or activation, electron transfer, reduction of nitrogen oxides, and hydrolytic che- mistry[1]. Consequently binuclear copper complexes with two ions in close proximity have received a great deal of attention[2～4]. These complexes are particularly of interest in the field of biomimetic chemistry to provide impr…     

Synthesis and Crystal Structure of Copper(Ⅱ) Compound with Didentate Schiff-base Ligand

1INTRODUCTIONTransitionmetalcomplexesofSchiff-baseligandswhichbindtwoormoremetalcentersincloseproximityareimportantaspotentialcatalysts[1]andasmodelsforanumberofmetalloproteins[2]duetotheopportunitytheyprovidefortheinvesti-gationofmagneticinteractions.The…     

Synthesis and Crystal Structure of Binuclear Complex of Copper(Ⅱ)Chloroacetate with Acetamine

１ＩＮＴＲＯＤＵＣＴＩＯＮＣｏｐｐｅｒｃｏｍｐｌｅｘｅｓｈａｖｅａｌａｒｇｅｖａｒｉｅｔｙｏｆｓｔｅｒｉｃｓｔｒｕｃｔｕｒｅｓａｎｄｐｌａｙａｎｉｍｐｏｒｔａｎｔｒｏｌｅｉｎｃａｔａｌｙｓｉｎｇｔｈｅｅｎｚｙｍａｔｉｃａｃｔｉｖｉｔｉｅｓ，ｗｈｉｃｈ...     

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 synthe- sized 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) , α = 117.214(10), β = 108.251(9), γ = 91.560(6)o, V = 562.3(4) 3, Z = 1, Mr = 591.30, F(000) = 298, Dc = 1.746 g/cm3, 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 .     

Hydrothermal Synthesis, Crystal Structure and Magnetic Property of a Novel Pentanuclear Copper(Ⅱ) Complex: [Cu5(SIP)2(HSIP)2(H2O)18](H2O)5

The pentanuclear complex, [Cu5(SIP)2(HSIP)2(H2O)18](H2O)5 (H3SIP=5-sulfoi-sophthalic acid), has been synthesized by the hydrothermal reaction of CuCl2 with NaH2SIP at 160 ℃, and characterized by single-crystal X-ray diffraction and IR spectrum. The crystal of the complex crystallizes in a trielinic system, space group P1, with a = 7.0018(5), b = 11.9725(8), c = 19.0424(13) A, α = 78.8540(10), β = 85.1710(10),γ = 83.6080(10)~, V = 1553.24(19) A3, Z = 1, C32H60O51S4Cu5, Mr= 1706.74, Dc= 1.825 g/cm3,μ = 1.937 mm-1, F(000) = 869, the final R = 0.0709 and wR = 0.1503 for 4235 observed reflections with I > 2σ(I). The five Cu2+ ions are connected by two symmetry-related tridentate SIP3- ligands and charge-balanced by two monodentate HSIP2- ligands, giving a discrete pentanuclear structure. The pentanuclear copper molecules are linked by hydrogen bonds to form a three-dimensional supramolecular structure. The temperature-dependent magnetic susceptibility data revealed weak ferromagnetic magnetic interactions between the Cu2+ ions.     

Synthesis and Crystal Structure of Zn(Ⅱ) Complex with Tridentate Ligand N-(2-Hydroxy-1-naphthylidene)-L-serine

A new Zn(Ⅱ) complex, [Zn(L)2(H2O)2], where H2L = N-(2-hydroxy-l-naphthylidene)-L-serine, has been synthesized and characterized by single-crystal X-ray diffraction. The crystal belongs to monoclinic system, space group C2/c with a = 13.669(2), b = 6.4657(9), c =31.463(5) (A), β = 98.010(2)°, V = 2753.6(7) (A)3, Z = 8, Mr = 358.64, Dc = 1.730 g/cm3, F(000) =1472,μ(MoKa) = 1.814 mm-1, the final R = 0.0355 and wR = 0.0706. The Zn(Ⅱ) atom adopts a square-pyramidal geometry coordinated by the tridentate ligand and two water molecules.Intermolecular hydrogen bonds link the complex molecules into a two-dimensional layer.     

Synethesis and Crystal Structure of Bi(ethylenediamine)copper Tetracyanonickelate(Ⅱ)

The crystal structure of the title compound C8H16CuN8Ni has been determined by single crystal X-ray diffraction. The crystal is triclinic with space group P1, a=6.494(3), b=7.270(4), c=7.936(5) .A, α=106.67(3), β=91.33(4), γ=106. 80(6)°, V=341. 3(3) A3, Z==1, Mr=346. 54, F(000)=177, μ=2. 933mm-1, Dc= 1. 686 Mg/m3. The final R factor is 0. 0603 for 1214 unique ob24- served reflections [I≥2σ(I)]. The structure consists of [Cu(en)2]2+ (eh=ethylenedi amine) cations and [Ni(CN)4]2- anions linked together by two of the CN groups (the remaining two act as unidentate ligands) to form infinite chains, in the chain, the hy between the interchains also exist, with distances of 3. 160 and 3. 124 A , so it forms a three-dimensional structure of the title compound.     

Synthesis and Crystal Structure of a 1-D Copper(Ⅱ) Polymer with 1-Hexylimidazole and Oxalate

A novel Cu(Ⅱ) complex has been prepared by means of self-assembly of CuCl2,1-hexylimidazole L and oxalic acid(H2OX) in the presence of triethylamine,and structurally characterized by X-ray diffraction analysis.In complex 1,1-D polymer chains are formed through pentacoordinated Cu(Ⅱ),oxalate and bridging chlorine atoms.In the crystal packing of 1,the imidazole ring head-to-tail π-π stacking interactions exist between 1-D polymer chains and extend the 1-D polymer chains into 2-D supramolecular layers.The fluorescence emission spectra of L and 1 were described.     

Synthesis and Crystal Structure of a Manganese(Ⅱ) Complex with 2-(4'-Chlorine-benzoyl)-benzoic Acid and 1,10-Phenanthroline

A new metal-organic complex Mn2(cbba)4(phen)2 (Hcbba = 2-(4'-chlorine-benzoyl)-benzoic acid, phen = 1,10-phenanthroline) 1 has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analyses and IR spectroscopy. The compound crystallizes in orthorhombic, space group Pbcn with a = 12.154(5), b = 18.166(7), c =31.197(13) (A°), V = 6887(5) (A°)3, C80H48C14Mn2N4O12, Mr= 1508.90, Dc = 1.455 g/cm3, μ(MoKa) =0.591 mm-1, F(000) = 3080, Z = 4, the final R = 0.0408 and wR = 0.0873 for 4033 observed reflections (I > 2σ(I)). In the crystal structure, the manganese atom is six-coordinated with four carboxylate oxygen atoms from three different cbba ligands and two nitrogen atoms from phen ligands, showing a distorted octahedral geometry. Furthermore, it exhibits a 3D supramolecular network through π-π interactions.     

Hydrothermal Synthesis and Crystal Structure of a New Manganese(Ⅱ) Complex with 2,4-Pyridine-dicarboxylic Acid and 2,2'-Bipyridine Ligands

A new metal-organic complex [Mn_2(PDC)_2(bipy)_2(H_2O)_2] (H_2PDC=2,4-pyridinedicarboxylic acid,bipy=2,2'-bipyridine) 1 has been hydrothermally synthesized and structurally characterized by elemental analysis,IR spectrum,TG and single-crystal X-ray diffraction. The compound crystallizes in triclinic,space group P~(-)1 with α=7.376(3),b=9.990(4),c=11.950(5)(A),α=75.217(5),β=78.052(5),γ=70.655(5)°,V=796.0(5)(A)~3,C_(34)H_(26)Mn_2N_(6O)O_(10),M_r=788.49,D_c= 1.645 g/cm~3,μ(MoKa) = 0.866 mm~(-1),F(000)=235,Z=1,the final R=0.0425 and wR=0.0700 for 1971 observed reflections (Ⅰ > 2σ(Ⅰ)). In the crystal structure,the manganese atom is six-coordinated by two carboxylate oxygen atoms from two different PDC ligands,one aqua ligand,and three nitrogen atoms from 2,2'-bipy and PDC ligands,giving a distorted octahedral geometry. It exhibits a three-dimensional supramolecular network defined by O-H…O hydrogen-bonding interactions.     

Synthesis and Crystal Structure of a Tetranuclear Cu(Ⅰ) Complex with Vinyfidenebis(diphenylphosphine)

The vinylidenebis(diphenylphosphine) (vdpp) reacts with CuBr to give a tetranuclear complex, [Cu4(μ3-Br)2(μ2-Br)2(μ2-vdpp)2(CH3CN)2]·(CH3CN)2 1. The title complex has crystallo-graphically imposed centrosymmetry and presents a Cu4Br4 core with distorted stair-like structure. All copper(Ⅰ) atoms in 1 assume distorted tetrahedral coordination geometry. The distance of 2.7745(11) A between the two copper centers indicates the presence of ligand-supported Cu…Cu interactions. Crystal data for 1: C60H56Br4Cu4N4P4, Mr = 1530.77, triclinic, space group P1, a = 11.6593(9), b = 11.7181(9), c = 13.8711(11) A, α = 110.1020(10), ,β = 102.0050(10), γ = 109.8040(10)°, V = 1557.5(2) A3, Z = 1, Dc = 1.632 g/cm3, F(000) = 760, λ = 0.71073 A, T = 298(2) K, 2θmax = 50.04°,μ = 4.056 mm-1, S = 1.181, R = 0.0507 and wR = 0.1025.     

Hydrothermal Synthesis and Crystal Structure of a New One-dimensional Cobalt(Ⅱ) Complex with 2-Pyridinecarboxyic Acid and 4,4'-Bipyridine Ligands

A new metal-organic coordination polymer [Co(2-pya)2(4,4'-bipy)]2n·[(4,4'- bipy)0.5· H2O]2n(2-pya = 2-pyridinecarboxylic acid, 4,4'-bipy = 4,4'-bipyridine) 1 has been hydrothermally synthesized and structurally characterized by elemental analysis, IR spectrum, TG and single-crystal X-ray diffraction. The complex crystallizes in tetragonal, space group I41/a with a = b = 22.719(2), c = 10.710(2) A, V = 5527.8(14) A3, C54H46N10Co2O10, Mr = 1112.87, Dc = 1.337 g/cm3,μ(MoKα) = 0.665 mm-1, F(000) = 2296, Z = 4, the final R = 0.0633 and wR = 0.1096 for 1261 observed reflections (I ＞ 2σ(I)). It exhibits a one-dimensional chain-like structure constructed by mixed ligands of 2-pyridinedicarboxylic acid and 4,4'-bipyridine.     

Synthesis and Crystal Structure of Tetra Benzoates Bridged Binuclear Sm(III) Complex

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Synthesis and Crystal Structure of Bis（barbiturato） triwater Complex of Copper（Ⅱ）

1 INTRODUCTION A variety of transition metal complexes with barbiturates have been prepared owing to their important roles in clinical detection and identi- fication of drug[1～5]. They have the general formula of M(Ⅱ)(barb)2L2, where M is a transition metal (Co, Cr, Zn, Cu etc), barb the anion of a substituted barbituratic acid and L an organic base, usually pyridine. In these complexes, the donor atom in the barbiturate anion is a deprotonated nitrogen atom and, the coordination …     

Synthesis,Crystal Structure and Spectroscopic Properties of Zn(Ⅱ) with N-carbamylglutamate Ligand

Zn C6H8N2O5.H2O(NCGZn) has been synthesized, and its functional groups present in the title compound were confirmed by elemental analysis, TG and IR spectral studies. Meanwhile, the crystal of NCGZn was obtained by slow evaporation of a saturated aqueous solution at room temperature and confirmed by single-crystal X-ray diffraction analysis. It crystallizes in triclinic, space group P21 with a = 5.03220(1), b = 13.3747(4), c = 12.9944(4) , β = 92.987(2)o, V = 873.39(4) 3, Z = 2, C12H20N4O12Zn2, Mr = 543.10, Dc = 2.065 g/cm3, F(000) = 552, μ(Mo Ka) = 2.826 mm-1, R = 0.0422 and w R = 0.1142. In NCGZn, Zn(1) and the symmetry formed Zn(1) ions are connected by five atoms from four NCG-2H anions and a water molecule. A NCG ligand has two carboxylate groups, one connecting a Zn ion, and the other bridgiong two Zn ions. The NCG ligand bridges four Zn ions through the amino group and two carboxylate groups with a water molecule to yield a 3D coordination polymer structure with hydrogen bonds.     

Crystal Structure and Inhibitory Activity against Xanthine Oxidase of Bis(μ2-chloro)-chloro-(μ-N,N'-(2-pyridylmethylene)Furanmethanoamine Copper(Ⅱ)Complex

A chloro-bridged dinuclear copper(Ⅱ) complex with ligand 2-pyridylme-thylene-furfurylamine has been synthesized and characterized by single-crystal X-ray diffraction,and its inhibitory activity on xanthine oxidase(XO)Was also evaluated.It crystallizes in the triclinic system,space group P-1 with a=8.0441(16),b=8.5663(17),c=10.060(2)(A),α=77.52(3),β=72.04(3),γ=70.12(3)°,V=615.3(2)(A)3,Z=1,Dc=1.731 g/cm3,F(000)=322,the final R=0.0401 and wR=0.0934 for 1971 observed reflections with Ⅰ＞2σ(Ⅰ).X-ray analysis reveals that the Cu(Ⅱ)cation is five-coordinated by two N atoms of Schiff base and three C1 anions.The C-H…Cl intermolecular and intramolecular hydrogen bonds connect the molecules to form a three-dimensional network.Tilis copper(Ⅱ) complex shows more potent inhibitory activity against XO with Ⅰ C50=3.48/μM than the standard inhibitor allopurinol.     

Crystal Structure and Third-order Nonlinear Optical Property Studies on Copper(Ⅱ) Complex Containing NS Donor Ligand

Recently,thestudyofrelationshipsbetweenstructureandpropertyforseriesofcompoundhavingenhancedopticalnonlinearityhasincreaseourunderstandingofwhatmolecularleveIdesigncriteriaareimPortantformaximizingthesecondandthethird-ordernonlinearity'.lngeneral,thesestudieshavefocusedonmanipulationoftheeffectiveconjugationlengthforavarietyofn-electronbackbones,mostlyrelatedto.-PvariousorganiccomPoundscontainingdonorandacceptorgroups'.InthispaPer,wewillstudytheinteractionamongdonor-metal-donorinx-conjugation…     

Synthesis and Crystal Structure of a 1D Coordination Polymer: {[Cu(HSSA)(py) 3]·H2O}n (H3SSA=5-Sulfosalicylic Acid, py=Pyridine)

The title compound [Cu(HSSA)(py)3H2O]n (H3SSA = 5-sulfosalicylic acid,py = pyridine) Ⅰ has been synthesized and structurally determined by single-crystal X-ray diffraction. Ⅰ was further characterized by elemental analyses,thermogravimetric analyses,IR and UV-visible spectroscopy. The crystal belongs to the monoclinic system,space group P21/c with a = 9.4564(10),b = 18.2679(19),c = 15.7284(12) ,β = 126.045(4)o,V = 2196.9(4) 3,Z = 4,Dc = 1.618 g/cm3,Mr = 535.02,μ = 1.141 mm-1,F(000) = 1100,λ(MoKα) = 0.71073 ,the final R = 0.0429 and wR = 0.1044 for all observed reflections. In the structure,every two Cu(Ⅱ) atoms are bridged by a bivalent 5-sulfosalicylic anion to form a 1D chain-like coordination polymer. Lattice waters between chains link them to form 2D layers which are further linked by C-H···O hydrogen bonds to form a three-dimensional supramolecular network.     

Synthesis, Crystal Structure and Cytotoxic Activity of a Novel Nickel(Ⅱ) Complex with Schiff Base Derived from Salicylhydrazide

A novel Schiff base complex with π-conjugated system, [Ni(L1)2(py)2] 1 (L1 = (E)-N'-(2,4-dichlorobenzylidene)-2-oxidobenzohydraizide), was synthesized and characterized by elemental analysis and single-crystal X-ray determination. Complex 1 crystallizes in the monoclinic system, space group P21/n with a = 12.8286(10), b = 16.3573(13), c = 19.0206(14) (A), β =108.2920(10)°, V = 3789.6(5) A3, Z = 4, Mr = 833.17, Dc = 1.460 g/cm3, μ = 0.843 mm-1, F(000) = 1704, the final R = 0.0537 and wR = 0.0640 for 3836 observed reflections with Ⅰ> 2σ(Ⅰ). In the molecular structure of 1, the NiⅡ atoms are six-coordinated by two N and two O atoms from two Schiff base ligands (L1) and two N atoms from two pyridine solvent molecules to form a distorted octahedral geometry. The cytotoxic activities of complex 1 have been experimentally studied against a human HeLa cell in vitro.