Synthesis,Structure and Magnetic Property of a Binuclear Nickel(Ⅱ) Complex

A new binuclear complex [Ni2(2,2'-bpy)2(C8H3NO6)2(H2O)4] 1 (2,2'-bpy = 2,2'- bipyridine, C8H3NO6 = 4-nitrophthalate) has been synthesized by a hydrothermal reaction and characterized by X-ray single-crystal diffraction analysis. The complex crystallizes in triclinic, space group P1 with a = 7.206(2), b = 10.337(4), c = 12.480(4) , α = 89.887(11), β = 77.033(9), γ = 78.349(6)o, V = 886.3(5) 3, Z = 1, C36H30Ni2N6O16, Mr = 920.08, Dc = 1.724 g cm-3, F(000) = 472, μ = 1.152 mm-1, the final R = 0.0458 and wR = 0.1163 for 3372 observed reflections with I 2σ(Ⅰ). The two Ni(Ⅱ) ions are bridged by two 4-nitrophthalates both in a bis-monodentate mode. Magnetic measurements reveal that the intramolecular exchange couplings in the dimer are ferromagnetic with 2J/k = 2.32 K, D =-1.44 K and g = 2.18.     

Synthesis,Crystal Structure and Magnetic Property of a Novel Cu(Ⅱ)-Fluconazole-azide Complex

The title compound formulated as Cu2(C13H11N6OF2)(N3)3CH3OH was synthesized and structurally characterized by elemental analysis,IR and single-crystal X-ray diffraction.In the structure of the complex,the deprotonated fluconazole and azide anion link two copper centers to construct a binuclear SBU and the azide anion exhibits a μ1,1-coordination mode.Each triazole group of fluconazole links two SBUs and the compound exhibits a chain-like architecture with strong antiferromagnetism.     

A Novel Zn(Ⅱ) Complex with 4-Connected umc Topology:Synthesis,Crystal Structure and Luminescent Property

A novel complex, [Zn(L)]2·H2O(1, H2 L = 4-aminophthalic acid), has been hydrothermally prepared and characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis and PXRD. Complex 1 crystallizes in monoclinic, space group C2/c with a = 12.4267(6), b = 7.7482(3), c = 18.6983(8) ?, β = 110.437(3)o, V = 1687.04(13) ?3, Z = 4, C16H12N2O9Zn2, Mr = 507.06, Dc = 1.996 g/cm3, μ = 2.903 mm-1, S = 0.989, F(000) = 1016, the final R = 0.0304 and w R = 0.0720 for 12618 observed reflections(I 2σ(I)). Single-crystal X-ray structural analysis reveals that compound 1 features a three-dimensional(3D) framework with 4-connected umc topology. Moreover, the thermogravimetric(TG) analysis and photoluminescent property of 1 were also discussed.     

Synthesis,Structure and Property of One Bis (benzimidazolin-2-ylidene) Arene-mercury(Ⅱ) Complex

Reaction of a N-heterocycliccarbene(NHC) containing an anthracene unit and two N-picolyl moieties with Hg(OAc)2 yielded a novel mercury(Ⅱ) complex(1). X-ray studies, UV-vis and fluorescence spectroscopy confirmed that a strong interaction exists between the mercury atom and anthracene unit.     

A Dinuclear Cd(Ⅱ) Cluster-based Coordination Polymer:Synthesis,Structure and Luminescence Property

One two-dimensional coordination polymer with a formula of {[Cd(L)(imidazole)(H_2O)](H_2O)}n(1) was obtained by the synthetic reactions in aqueous solution using a newly synthesized H_2L(H_2L = methyl-3-hydroxy-5-carboxy-2-thiophenecarboxylate) ligand.Compound1 crystallizes in monoclinic system,space group C2/c with a = 18.3176(11),b = 8.5366(9),c =8.4152(5) ?,β = 101.789(6)o,V = 2797.1(3) ?~3,D_c = 1.979 g/cm~3,C_(10)H_(12)N_2O_7SCd,Mr = 416.68 F(000) = 1648,μ = 1.745 mm~(-1),F(000) = 1648,the final R = 0.0323 and wR = 0.0604 for 2604 observed reflections with I 2s(I).Structure analyses reveal that the compound is constructed by dinuclear Cd(Ⅱ) clusters bridged by two hydroxyl oxygens of L~(2-)anions,which features a two-dimensional network with 4-connected sql topology.Furthermore,the compound exhibits high thermal stability and intense fluorescent emission,and could be explored for potentia luminescent materials.     

Synthesis and Structure of Dimeric β-Diketiminato Co(Ⅱ) Chloride Complex

Introduction Recently, late-transition-metal complexes have been extensively used as both inorganic and organometallic catalysts[1]. Some complexes have been developed as the novel olefin polymerization catalysts[2-4] and copolymerization catalysts for ethylene and polar comonomers[5] due to their lower oxophilicity and presumed greater functional tolerance. Moreover, compounds with imine ligands have received more attention and have been reported for the synthesis method, structure, mechanism and application[6-9]. In this contribution, we report the synthesis of the dimericβ-diketiminato Co(Ⅱ)chloride complex:     

Synthesis,Structure and Magnetic Property of One Ni~Ⅱ Based Coordination Polymer

One new coordination polymer, [Ni(m-bix)(m-BDC)](1, m-bix = 1,3-bis(imidazol-1-ylmethyl)benzene, m-BDC = 1,3-benzenedicarboxylic acids), has been hydrothermally synthesized and structurally characterized by elemental analysis, IR, TGA and X-ray single-crystal diffraction. The green block crystal of complex 1(C22H18N4Ni O4) belongs to monoclinic system, space group P21/c with a = 10.0418(3), b = 23.8651(6), c = 8.7872(2) A, β = 112.333(3)o, V = 1947.88(9)A3, Z = 4, Dc = 1.572 g/cm3, Mr = 461.11, F(000) = 952, R = 0.0335 and w R = 0.0683 for 2827 observed reflections(I 2σ(I)). Complex 1 exhibits a novel 6-connected 3D sxd type topological framework. The magnetic characterization of complex 1 shows antiferromagnetic coupling exchange.     

A New Tetranuclear Cubane-like Ni(Ⅱ) Complex Based on Schiff-base Ligand: Synthesis,Crystal Structure and Magnetic Properties

A new Ni(Ⅱ) cubane-like complex, namely, [Ni(L)(CH_3OH)]_4·(CH_3OH)_2, has been obtained via self-assembly of nickel(Ⅱ) and Schiff base, where the ligand L is a raceme of(R)-2-[(2-hydroxy-1-phenyl-ethylimino)-methyl]-6-methoxy-phenol. X-ray diffraction analysis reveals that the complex shows a cubane-like [Ni_4O_4] cluster and similar coordination environment around the metallic centers. Magnetic measurements indicate there is ferromagnetic interaction within the Ni_4 cluster.     

Synthesis,Crystal Structure and Magnetic Property of Copper(II) Complex with 4′-Cyanobenzyl-1-imidazol

A neutral mononuclear complex [Cu(cbIm)₄(NO₃)₂] (cbIm = 4'-cyanobenzyl-1-imidazol) was synthesized and characterized by x-ray crystallography. It crystallizes in the triclinic space group P-1 with a = 8.249(2), b = 8.735(2), c = 16.597(2) Å, f = 81.980(10), g = 88.540(10), n = 63.570(10)° and Z = 2. The final refinement of the structure leads to R and Rw of 0.0394 and 0.0991, respectively. The crystal structure of the complex indicates a distorted octahedral environment around the Cu(II) atom, coordinated by four imidazole N atoms of four cbIm and two O atoms of two nitrates. Magnetic measurements show that the complex exhibits Curie behavior.     

A Novel 3D Pillar-layered Co(Ⅱ)-MOF with(4,8)-Connected Topology: Synthesis,Structure and Magnetic Properties

By using pillaring strategy, a new Co(Ⅱ)-MOF, [Co_2(abtc)(bimb)_2]·2H_2O(1, H_4abtc = 3,3?,5,5?-azobenzenetetracarboxylic acid, bimb = 4,4?-bis(imidazole-1-ylmethyl)biphenyl), has been solvothermally synthesized and structurally characterized. The structural determination revealed that 1 features a 3D pillar-layered framework with(4,8)-connected {4~4.6~2}{4~8.6~(20)} topology based on dinuclear Co(Ⅱ)-SBUs. The magnetic investigation shows that the dominant antiferromagnetic coupling is observed in compound 1.     

Synthesis, Crystal Structure and Magnetic Properties of a New Zn(Ⅱ)-Nitronyl Nitroxide Complex

A new complex [Zn(NIT-1'-MeBzIm)Cl2(H2O)] (NIT-1'-MeBzIm = 2-{2'-[(1'-methyl)benzimidazolyl]}-4,4,5,5-tetramethylimidazoline-l-oxyl-3-oxide) has been prepared and structurally characterized by X-ray diffraction method. Crystal data: monoclinic, space group P21/n, Z = 4, C15H21Cl2N4O3Zn, Mr = 441.63, a = 7.2225(10), b = 30.849(4), c = 8.8758(13) (A), β= 103.904(2)°, V = 1919.6(5) A3, Dc = 1.528 g/cm3, μ(MoKα) = 1.579 mm-1, F(000) = 908, R = 0.0436 and wR = 0.1029 for 2456 observed reflections with Ⅰ> 2σ(Ⅰ). X-ray analysis reveals that the Zn(Ⅱ) ion is four-coordinated with a distorted tetrahedron. There also exist H-bonds, π-π piling interactions and weak intermolecular contacts between the NO groups which form a mutual stagger 3-D network configuration. Magnetic investigation reveals that there exists intermolecular antiferro- and ferromagnetic interactions in the title complex.     

Thiocyanate-controlled Copper(Ⅱ)-L-arginine Complex:Synthesis,Crystal Structure and Characterization

A novel thiocyanate-controlled copper(Ⅱ)-L-arginine complex with the formula of Cu(Arg)(SCN)_2(1,Arg:L-arginine) has been obtained from aqueous solution and structurally characterized by single-crystal X-ray diffraction method.Crystal data:orthorhombic,space group P2_12_12_1,a = 6.0156(5),b = 12.1905(11),c = 18.4203(16) ?,V = 1350.8(2) ?~3,Z = 4,μ = 1.933mm~(-1),F(000) = 724,S = 1.084,the final R = 0.0410,wR = 0.0754 for 1893 observed reflections with I 2σ(I),and R = 0.0559,wR = 0.0820 for all reflections.In addition,elemental analysis,IR,TG-DTG and magnetism characterization are presented.     

A New One-dimensional Dicyanamide Bridged Zinc(Ⅱ) Complex Containing Nitronyl Nitroxide Radicals: Synthesis,Crystal Structure and Magnetic Properties

A new one-dimensional dicyanamide bridged zinc(Ⅱ) complex containing nitronyl nitroxide radicals [Zn(NO3)(NIT-1'-MeBzim)(dca)]n·(H2O)n (NIT-1'-MeBzIm = 2-{2'-[(1'-me-thyl)benzimidazolyl]}-4,4,5,5-tetramethylimidazoine-1-oxyl-3-oxide, dca = dicyanamide anion) has been prepared and structurally characterized by single-crystal X-ray diffraction. The complex crystallizes in trielinic, space group P1, with a = 7,428(3), b = 9.839(3), c = 16.708(6) A, а = 93.270(4), β= 101.642(4),γ= 100.632(4)°, C17.5H21N8O5.5Zn, Mr = 496.79, V= 1169.7(7) A3, Dc = 1.411 g/cm3,μ(MoKa) = 1.096 mm-1, Z = 2, F(000) = 512, R = 0.0583 and wR = 0.1663 for 4295 observed reflections with I > 2σ(I). X-ray analysis reveals that the zinc(Ⅱ) ion is six-coordinated with a distorted oetahedral geometry. These units develop as 1D species where dieyanamide ligands bridge zine(Ⅱ) ions. In addition, molecules are linked by π-π piling interactions to form 1-D double-chains. Magnetic investigation indicates that the weak intramoleeular interactions are antiferromagnetic with J = -0.27 cm-1, where the spin Hamitonian is defined as H = -2 ∑ijJijSiS within the complex.     

Synthesis,Structure,and Magnetic Property of One Novel Entangled Cobalt~Ⅱ-organic Compound

One novel entangled cobalt compound,{[Co 3 (nbta) 2 (4,4-bpy) 2 (H 2 O) 2 ](H 2 O) 2 } n (1,H 3 nbta=5-nitro-1,2,3-benzenetricarboxylic acid,4,4-bpy=4,4-bipyridyl),was prepared and characterized by X-ray diffraction,magnetism,elemental analysis,XPS,TGA and IR spectroscopy.The crystal of 1 crystallizes in monoclinic,space group Pc with a=13.0717(16),b=11.4167(14),c=15.9342(19),β=90.5190(10)o,V=2377.9(5)3,Z=2,C 48 H 36 Co 3 N 8 O 20,M r=1221.64,D c=1.706 g/cm 3,F(000)=1242 and μ(MoKα)=1.128 mm-1.The final R=0.0497 and wR=0.1461 for 4185 observed reflections with I > 2σ(I) and R=0.0721 and wR=0.1619 for all data.X-ray diffraction analyses revealed that Co(1) is linked by the nbta 3-ligands to form the ladder shape along the c axis,which is further extended into two-dimensional networks via the joint of Co(2) along the a axis.Moreover,these two dimensional motifs are interconnected by the 4,4-bpy bridges to form a complicated 3-D polymeric framework.Magnetic measurements revealed that compound 1 shows strong antiferromagnetic property.     

Hydrothermal Synthesis,Structure and Magnetic Property of a Novel Hexa-Ni~Ⅱ Substituted Polyoxometalate

A novel hexa-NiⅡ substituted trilacunary Keggin polyoxometalate [{Ni6（μ3- OH）3（en）3（H2O）6}（B-α-PW9O34）]-6H2O 1 （en = ethylenediamine） has been hydrothermally synthesized and characterized by IR spectra, elemental analysis, thermogravimetric analysis （TGA）, single-crystal X-ray diffraction and magnetic property. Compound 1 crystallizes in the hexagonal space R3c with a = 20.4124（5）, c = 21.4427（4）A, γ = 120.000°, V = 7737.5（3）A3, Z = 6, GOF = 1.083, R （wR） = 0.0317 （0.0610）. Single-crystal X-ray diffraction indicates that 1 contains a hexa-Nin substituted trivacant Keggin [{Ni6（μ3-OH）3（en）3（H2O）6}（B-α-PW9O34）] unit. The magnetic study shows the presence of ferromagnetic coupling interactions within hexa-Nin clusters with J1 = 0.69 cm-1 and J2 = 0.92 cm^-1 for 1.     

Crystal Structure And Magnetic Property of the Complex of Hydrogen-bonded Two-dimensional Layer Copper(Ⅱ) Acrylate with Trimethyl Phosphate

Coopper carboxylate complexes play an important role in catalysing the enzymatic activi-ties[1— 4] ,and the phosphate has an especial use in DNA recognition[5] .Indeed the reportabout copper carboxylate complexes with phosphate ligands is rare. A chain structuresupramolecule [Cu2 (CH2 CH— COO) 4 (H2 O) 2 ] n has been reported recently[6] ,in which aCu2 (CH2 CH—COO) 4 (H2 O) 2 unitislinked by four O(water)—H…O(carboxyl) hydrogenbonds with two adjacentunits(Fig.1 ) .In this work …     

A Chain Cadmium(Ⅱ) Coordination Polymer with Diacylhydrazide: Synthesis,Crystal Structure and Luminescent Property

A novel Cd(Ⅱ) coordination polymer with diacylhydrazide ligand N,N?-bis(3-methoxysalicyl)-2,6-pyridinedicarbohydrazide(H_6msphz),[Cd_2(H_2msphz)(Py)_4]_n(1,Py = pyridine) has been synthesized through solvothermal reaction and structurally characterized by single-crystal X-ray diffraction,IR,TGA and PXRD investigations. It crystallizes in triclinic system,space group P1,with a = 11.0230(11),b = 11.7264(15),c = 17.3395(14) ?,α = 70.520(9),β = 84.806(7),γ = 81.965(9)°,V = 2089.9(4) ?~3,Dc = 1.638 gcm~(–3),μ = 1.083 mm~(-1),F(000) = 1032,Z = 2 and S = 1.040. In complex 1,the H_2msphz4-ligand uses not only its coordinated pocket to catch one Cd(Ⅱ) ion,but also its two terminal groups to chelate other two Cd(Ⅱ) ions,leading to the formation of a chain structure. The adjacent chains are further assembled together by two kinds of π-π interactions between the Py rings,resulting in the finial double layered supramolecular structure. In addition,complex 1 is found to show photoluminescence in the solid state at room temperature,which can be ascribed to the intraligand π→π* transitions.     

Synthesis,Structure and Near-infrared Photoluminescent Property of a Tetranuclear Er(Ⅲ) Complex

A tetranuclear erbium complex with pyridine-2,4,6-tricarboxylic acid(H3ptc), [Er4(ptc)4(H2O)18]·6H2O(1), has been synthesized by hydrothermal method. The complex crystallizes in triclinic system, space group P1, with a = 7.620(2), b = 10.459(3), c = 17.418(5) ?, α = 92.351(5), β = 92.080(5), γ = 95.627(4)°, V = 1379.1(7) ?3 and Z = 2. One Er(III) cation is eight-coordinated and the other is nine-coordinated. The complex exhibits characteristic luminescence of erbium cation in near-infrared region upon the excitation of UV-rays. Furthermore, a three-dimensional supramolecular complex was formed by weak hydrogen bonds among the tetranuclear units.