A New 3-D Sr(Ⅱ) Complex:Two-step Solvothermal Synthesis,Structure and Luminescent Properties

The title complex [HSr_3(pda)_3(H_2O)_3Cl]n(1, H_2pda = pyridine-2,6-dicarboxylic acid) has been prepared under two-step solvothermal conditions. It has been characterized by X-ray single-crystal diffraction, IR, TGA-DSC and elemental analysis. The crystal belongs to the trigonal system, space group R-3 with a = 14.484(2), b = 14.484(2), c = 21.970(4) ?, γ = 120 o, V = 3991.4(11) ?~3, C_(21)H_(16)ClN_3O(1)_5Sr_3, M_r = 848.68, Z = 6, Dc = 2.118 g/cm~3, μ = 6.175 mm~(-1), F(000) = 2484, the final R = 0.0457 and w R = 0.1139. This complex possesses a 3-D structure constructed from [HSr_3(pda)_3(H_2O)_3Cl]_2 units and connected by coordinated carboxylate groups of pda2-ligands. The topology symbol of this network is(4~(12)6~3). Luminescent property of the title complex has been investigated at room temperature.     

A Novel Phenoxyimine-based Schiff Base Ligand and Its Mononuclear Nickel(Ⅱ) Complex:Synthesis,Crystal Structure,Norbornene Polymerization and Catalytic Activity

A novel phenoxyimine-based Schiff base ligand and its mononuclear complex [C_(58)H_(52)N_2NiO_2](L = 2-benzhydryl-4-dimethoxy-3,5-dimethyl-salicylaldehyde) has been synthesized and characterized by IR spectrum, elemental analysis, TG, WAXD spectra, ~1H NMR and ~(13)C NMR. In addition, the molecular structure has been measured by single-crystal X-ray diffraction analysis. The crystal belongs to the monoclinic system, space group P2_1/c with a = 14.510(6), b = 18.573(7), c = 20.961(6) ?, β = 123.453(19)°, V = 4713(3) ?~3, M_r = 867.73, Z = 4, D_c = 1.223 g/cm~3, μ = 0.456 mm~(-1), F(000) = 1832, the final R = 0.0685 and wR = 0.1758(I 2σ(I)). The complex was used as homogeneous catalysis of polymerization of norbornene, and the MAO as cocatalyst. The nickel complex exhibited good catalytic activity up to 1.913 × 10~7 g of PNB(mol of Ni)~(-1)h~(-1),and the yields of these reactions depend on the nature of the substituent in the aromatic ring.     

A Manganese(Ⅱ) Coordination Polymer Constructed from Phosphonate Ligand:Synthesis,Crystal Structure and Magnetic Properties

A coordination polymer formulated as[Mn(5-pncH₂)₂H₂O](1,5-pncH₃=5-phosphono-1-naphthalenecarboxylic acid),was hydrothermally synthesized and magnetically characterized.Compound 1 features a three-dimensional structure in which the inorganic chains of[Mn(O-P-O)]_n are cross-linked by the organic groups of phosphonate ligands.Magnetic measurements of 1 indicate that dominant antiferromagnetic interactions are mediated between the Mn^Ⅱ centers.     

A Novel Dinuclear Copper(Ⅱ) Complex: Synthesis,Crystal Structure,Properties and Hirshfeld Surface Analysis

A novel copper complex [Cu_2(L)(DMF)_2](1, H_4L =(1 Z,N?Z)-3,5-dibromo-N?-((3,5-dibromo-2-hydroxyphenyl)(hydroxy)methylene)-2-hydroxybenzohydrazonic acid which was synthesized by in-situ oxidation reaction derived from H_2hdb(H_2hdb = 6,6?-((1 E,1?E)-hydrazine-1,2-diylidenebis(methanylylidene)) bis(2,4-dibromophenol)) has been synthesized and characterized by IR, elemental analysis(CHN), TG and single-crystal X-ray diffraction. The single crystal belongs to monoclinic system, space group P21/c with a = 13.538(1), b = 3.912(1), c = 23.778(1) ?, β = 105.232(5)o, Mr = 857.08, V = 1214.9(1) ?~3, Z = 2, Dc = 2.343 g/cm~3, F(000) = 824, μ = 8.375 mm~(–1), R = 0.0566, and w R = 0.1610. Compound 1 displays weak anti-ferromagnetic interactions through a η~1:η~1:η~1:η~1:η~1:η~1:μ_2-L~(4-) bridging mode. Hirshfeld surface analysis revealed that complex 1 was supported mainly by Br···H and H···H intermolecular interactions.     

Solvothermal Synthesis,Crystal Structure and Characterization of a New Binuclear Nickel(Ⅱ)Complex with 2-(4-Methylbenzoyl)benzoic Acid

A new binuclear nickel(Ⅱ) complex[Ni_2(MBBA)_2(HPT)_2(H_2O)_2]·2H_2O (1) was synthesized with nickel hydroxide,2-(4-methylbenzoyl)benzoic acid (HMBBA) and 3-(pyridin-2-yl)-1H-1,2,4-triazole (HPT).It crystallizes in the monoclinic space group P2_1/n with a=14.5902(13),b=8.8191(6),c=17.6120(14)?,β=110.830(9)o,V=2118.0(3)?~3,M_r=958.26,D_c=1.503 g/cm~3,Z=2,μ(Mo Ka)=0.959,F(000)=992,the final GOOF=1.001,R=0.0353 and w R=0.09864.Each central Ni(II) ion is coordinated by two oxygen and three nitrogen atoms,forming a distorted square pyramidal geometry.The XRD,TG,spectrum analysis and magnetic properties of 1 were studied.     

A Novel 3D Twofold Zn(Ⅱ) Coordination Polymer Constructed by Mixed Flexible Ligands: Synthesis,Crystal Structure and Fluorescence Property

A new Zn(Ⅱ) coordination polymer, {[Zn(1,3-bip)(oba)]·0.5H_2O}n(1),1,3-bip =1,3-bis(imidazole)propane, H_2oba=4,4?-oxybis(benzoate)), have been synthesized and characterized by single-crystal X-ray diffraction, powder XRD, FTIR, TGA and elemental analysis techniques. The single-crystal X-ray diffraction reveals that complex 1 shows a 3D→3D twofold interpenetrating network that can be described as a 4-connected uninodal net with(65.8) topology. In addition, the photoluminescence property of complex 1 was also investigated at room temperature.     

A Chinese Lantern-like 2D Cu(Ⅱ) Coordination Polymer Constructed by Bis-imidazole and Dicarboxylate Co-ligands: Synthesis,Crystal Structure and Photocatalytic Activity

A new Cu(II) coordination polymer, {[Cu(1,3-BIP)(TFBDC)]·DMF}n(1,1,3-BIP is a 1,3-bis(imidazole)propane, and H2TFBDC is 2,3,5,6-tetrafluoroterephthalic acid) was prepared under solvothermal conditions and characterized by single-crystal and powder X-ray diffraction, IR spectra, thermogravimetric analyses and elemental analyses. The single-crystal X-ray diffraction reveals that metal coordination polymer 1(MCP 1) shows a two-dimensional sheet layer structure, which is further reinforced through strong intermolecular hydrogen bonding to form a 3 D supramolecular framework. Furthermore, the photocatalytic experiment result indicates the degradation ratios of methyl orange(MO) reach 83.4% within 180 minutes when MCP 1 acts as catalyst.     

A Novel 3D Cu(Ⅱ) Coordination Polymer Containing Mixed Ligands: Synthesis,Crystal Structure and Properties

A novel compound, {[Cu2(nbdc)2(4,4'-bpy)2(H2O)2]·2H2O}n(H2nbdc = 4-nitrobenzene-1,2-dicarboxylic acid, 4,4'-bpy = 4,4'-bipyridine), was hydrothermally synthesized and characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis(TGA), and single-crystal X-ray diffraction. The complex is of orthorhombic system, space group Pbcn with a = 32.222(7), b = 7.8503(16), c = 28.389(6), V = 7181(3)3, Dc = 1.720 g/cm3, Mr = 929.74, Z = 8, F(000) = 3792, μ = 1.273 mm-1, the final R = 0.0591 and wR = 0.1378 for 4548 observed reflections with I 2σ(I). The compound exhibits a 3D self-penetrating framework with bcu net topology, in which the(46·48)-networks are joined by the H2nbdc and 4,4'-bpy linkers.     

Synthesis,Crystal Structure and Thermal Stability of(Diacetylacetone)(diimidazole)Nickel(Ⅱ)Complex

The title compound, [Ni(acac)2(Im)2] (acac = acetylacetone), has been obtained by the reaction of Ni(acac)2 with imidazole ligand in the ethanol solvent. The blue crystal is of triclinic, space group Pī with a = 7.472(2), b = 9.456(2), c = 13.823(3)A, α = 85.55(3), β = 89.03(3), γ = 80.63(3)o, C16H22N4NiO4, Mr = 393.09, V = 960.7(3)A3, Z = 2, Dc = 1.359 g/cm3, F(000) = 412, μ = 1.036 mm－1, R = 0.0549 and wR = 0.1615. The crystal structure consists of two disconnected structural units. Each Ni atom coordinated by two N atoms from two imidazole ligands and four O atoms from two acetylactone ligands adopts a slightly distorted octahedron. The structure characterization was performed by means of IR, UV, TG, elemental analysis and single-crystal X-ray analysis. The thermal gravity (TG) data indicate that thermal decomposition of the title compound takes place in two steps, and the residue is NiO.     

Synthesis and Crystal Structure of Bis(cyclopentadienyl) Ytterbium Complex Supported by β-Diketiminate

Treatment of the β-diketiminate-supported ytterbium dichloride LYbCl2(THF)2 1 (L = N,N'-bis(2,6-dimethylphenyl)-2,4-pentanediiminate) with 2 equiv of C5H5Na gave rise to the title complex LYb(C5H5)2 2 (C31H35N2Yb, Mr = 608.65), and its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to monoclinic, space group P21/n with a = 14.417(2), b = 10.432(2), c = 18.040(4)(A),β= 95.73(2)°, V = 2699.6(9)(A)3, Dc = 1.498 g/cm3, Z = 4,λ(MoKα) = 0.71073(A), μ = 3.485 mm(1, F(000) = 1220, the final R = 0.0304 and wR = 0.0703 for 3962 observed reflections with I > 2σ(I). In the molecular structure of the title complex, the central metal atom Yb is eight-coordinated by two cyclopentadienyl groups and two nitrogen atoms of β- diketiminate group to form a distorted tetrahedral geometry.     

Synthesis and Crystal Structure of Bis(cyclopentadienyl) Ytterbium Complex Supported by β-Diketiminate

1 INTRODUCTION Recent efforts in the design and synthesis of new ligand systems for lanthanide chemistry have been aimed at extending organolanthanide chemistry in the application of nitrogen-containing bidentate an- cillary ligands, such as β-diketiminates, guanidinates and amidinates, etc. A major impetus for such studi- es can be traced to the well known applications of lanthanide complexes in homogeneous catalysis[1, 2]. Recently, we have been interested in understanding the chemist…     

Synthesis and Crystal Structure of Nickel Complex of DSEN

1INTRoDUCTIoNTheSchiffbasesareofgreatimportanceincoordinationchemistryasligands.TransitionmetalcomplexespreparedfromsalicylaldehydeSchiffbasespossessbiologi-calactivities[1~33.Forexample,Mn,Fe,Co,Ni,ZnandMoionsinproteincarryoxygen,transmitelectronandstoreprotein.Furthermore,manyofthiskindofcomplexescanalsobeusedashomogeneouscatalysts['~5i.WehavereportedthatSchiffbasespreparedbysalicylaldehydeandtriazolehavecatalyticactivitiesforsyn-thesizingethylenecarbonatet6).Forfurtherstudiesoftheca…     

Synthesis,Crystal Structure and Catalytic Properties of a 2D Cobalt(Ⅱ) Coordination Polymer Based on Mixed Ligands

A new Co(II) metal-organic coordination polymer based on flexible bis(imidazole) and aromatic dicarboxylate co-ligands, namely [Co(bix)(nph)]n(H2nph = 3-nitrophthalic acid, bix = 1,4-bis(imidazole-1-ylmethyl)benzene), has been hydrothermally synthesized and characterized by elemental analyses, TG, IR spectroscopy and single-crystal X-ray diffraction. It crystallizes in the triclinic space group P1 with a = 9.3767(14), b = 10.1451(15), c = 12.1488(17), α = 102.6450(10), β = 108.856(2), γ = 98.807(2)°, V = 1035.3(3)3, Z = 2, C22H17 Co N5O6, Mr = 506.34, Dc = 1.624 g/cm3, μ = 0.882 mm-1 and F(000) = 518. In the complex, the nph2- ligands connect neighbouring cobalt atoms to form binuclear [Co(nph)]2 subunits, which are linked by pairs of bix ligands to form a 2D honeycomb-like(6,3) network. In addition, the compound is further extended into a 3D supramolecular architecture by π···π stacking interactions. Moreover, the luminescence and catalytic properties of the complex are investigated.     

Synthesis and Crystal Structure of Bis(dicyanamide) (5,7,7,12,14,14-Hexamethyl-1,4,8,11-tetraazacyclotetradecane) Nickel(Ⅱ)

1 INTRODUCTION Crystal engineering is becoming an increase- ingly interest field by means of coordinated co- valent bonding or supramolecular contacts (such as hydrogen bonds, p-p interaction etc.)[1～7]. The ligand [N(CN)2]- is a remarkably versatile building block for constructing supramolecular architectures since it may act in uni-, biand tridentate manner. Additional ligands, such as coordinating amines (Lewis bases), in combination with dicyan- amide have been shown to produce n…     

Hydrothermal Synthesis,Crystal Structure and Properties of One Binuclear Nickel(Ⅱ) Complex with 3-(2-Pyridiyl)-1H-1,2,4-triazole

A new binuclear nickel(Ⅱ) complex [Ni_2(C_7 N_4 H_5)_3(C_9 H_9 O_2)]n has been hydrothermally synthesized with nickel sulfate, 3-(pyridin-2-yl)-~1 H-1,2,4-triazole and 3,5-dimethylbenzoic acid(3,5-DMBA). It crystallizes in the triclinic space group P1 with a = 11.5769(7), b = 12.3115(7), c = 12.6431(7) ?, α = 81.4860(10)o, β = 64.2830(10)o, γ = 63.7130(10)o, V = 1453.45(15) ?~3, D_c = 1.604 g/cm~3, Z = 2, F(000) = 720, the final GOOF = 1.048, R = 0.0285 and wR = 0.0628. The crystal structure shows that the whole molecule consists of two nickel ions bridged by three μ_2-η~1:η~0-3-(pyridin-2-yl)-1,2,4-triazole anions. The coordination environment of Ni(Ⅱ) ion is NiO_2 N_4 and NiN_5, giving a distorted octahedral geometry and square pyramidal geometry respectively. The luminescence and thermal properties of the complex were investigated.     

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.     

Nickel(Ⅱ) Complex Bearing a Salicylaldimine Ligand:Synthesis,Crystal Structure and Application in Norbornene Polymerization

A novel salicylaldimine ligand and its mononuclear nickel complex [NiL](L = 2-[[[2,6-bis(diphenylmethyl)-4-methylphenyl]imino]methyl]phenol) have been synthesized and characterized by IR spectrum, elemental analysis and thermogravimetry(TG). The molecular structure of the complex has been measured by single-crystal X-ray diffraction analysis. The crystal belongs to the monoclinic system, space group P2_1/n with a = 13.281(3), b = 16.938(3), c = 13.981(3) ?, β = 97.03(3)o, V = 3121.2(11) ?~3, C_(80)H_(64)N_2O_2Ni, M_r = 1144.04, Z = 2, D_c = 1.217 Mg/m~3, μ = 0.361 mm~(-1), F(000) = 1204, the final R = 0.0582 and wR = 0.1108(I 2s(I)). The compound showed excellent catalytic activity up to 12.78 × 10~6 g of PNB(polynorbornene)(mol of Ni)~(-1) h~(-1) for the addition polymerization of norbornene(NB) by using methylaluminoxane(MAO) as a cocatalyst.     

Synthesis and Crystal Structure of Bis(dicyanamide)(5,7,7,12,14,14-Hexamethyl-1,4,8,11-tetraazacyclotetradecane) Nickel(Ⅱ)

The nickel ( Ⅱ ) complex [Ni(teta) { N(CN)2 } 2] (teta = 5,7,7,12, 1 4, 1 4-hexamehyl- 1,4,8,1 1-tetraazacyclotetradecane) was synthesized and its structure has been determined by singlecrystal X-ray diffraction. Crystal data: C20H36N10Ni, monoclinic, space group P21/c, a = 9.632(2), b = 11.833(2), c = 10.613(2) A, β= 93.46(3)°, V= 1207.4(4) A3, Mr = 475.30, Z= 2, Dc= 1.307 g/cm3,F(000) = 508,μ(MoKα) = 0.831 mm-1, R = 0.0446 and wR = 0.1274 for 2423 observed reflections with I ＞ 2σ(I). The center nickel ion is coordinated by six nitrogen atoms, four from the macrocyclic ligand teta and the other two from two dicyanamides. The dicyanamide is coordinated to the metal atoms as uni-dentate manner via nitrile nitrogen atom.