Synthesis and Crystal Structure of a New Complex Zn(Ⅱ)L_2·2CH_3OH(H_2L = 4-Chloro-2-(2,3-dihydro-1H-benzoimidazol-2-yl)-phenol)

A new complex Zn(Ⅱ)L2·2CH3OH(H2L = 4-chloro-2-(2,3-dihydro-1H-ben-zoimi-dazol-2-yl)-phenol) has been prepared and characterized by single-crystal X-ray diffraction analysis and elemental analysis.The crystal is of triclinic system,space group P1 with a = 9.2905(10),b = 10.3555(13),c = 14.9590(14) ,α = 101.0340(10),β = 101.261(2),γ = 99.1660(10)o,V = 1356.1(3) 3,Z = 2,C28H24Cl2N4O4Zn,Mr = 616.78,Dc = 1.510 g/cm3,μ = 1.145 mm·1,F(000) = 632,the final R = 0.0379 and wR = 0.0830 for 3606 observed reflections with I 2σ(I).The Zn(Ⅱ) atom presents a distorted square pyramidal coordination involving two H2L ligands.The hydrogen bonds and π···π stacking interactions extend the complex into a two-dimensional framework.     

Two 3-D Neutral Zn(Ⅱ)-MOFs Generated from the Asymmetric Schiff-base Ligand

Two new Zn(Ⅱ)-MOFs were synthesized based on an asymmetric Schiff-base ligand LH, which is obtained by the condensation of 5-formyl-8-hydroxyquinoline and 3-pyridinecarboxylic acid hydrazide. In different mixed solvents, we get two new isomorphism compounds, [Zn(L)2]·C4H8O2·2MeOH(1) and [Zn(L)2]·CH2Cl2·2MeOH(2). Compounds 1 and 2 have been characterized by single-crystal X-ray diffraction, elemental analysis and IR. Compound 1 crystallizes in monoclinic, space group P21/c, with a = 13.856(4), b = 14.156(4), c = 9.620(3) , β = 110.167(5)°, V = 1771.3(9) 3, Dc = 1.500 g/cm3, C38H38N8O8 Zn, Mr = 800.13, F(000) = 832, μ(MoKα) = 0.761 mm-1, Z = 2, the final R = 0.0596 and wR = 0.1221 for 2112 observed reflections(I 2σ(I)). Compound 2 belongs to monoclinic, space group P21/c, with a = 13.575(3), b = 14.130(3), c = 9.485(2) , β = 107.908(3)°, V = 1731.2(6) 3, Dc = 1.529 g/cm3, C35H32Cl2N8O6 Zn, Mr = 796.96, F(000) = 820, μ(MoKα) = 0.926 mm-1, Z = 2, the final R = 0.0527 and wR = 0.1395 for 2501 observed reflections(I 2σ(I)). The Zn(Ⅱ) centers in both 1 and 2 display a distorted octahedral coordination geometry. The octahedral Zn(Ⅱ) nodes and L linkages build up 2-D nets consisting of parallelogram-like grids in the ab plane. The neighboring nets stack through hydrogen bonds to generate 3-D rhombic channels. In 1, the 1,4-dioxane and MeOH guests alternatively arrange in the channels and effectively take up the free space; while in 2, the CH2Cl2 guests are arranged in the channels. In addition, the encapsulated MeOH molecules are bonded to the framework by hydrogen bonds.     

Syntheses and Crystal Structures of 3-Carboxylsalicylidenefurfurylimine And Its Trinuclear Nickle(Ⅱ) Complex

A Schiff base ligand(H2CSF,C13H11NO4,1) derived from 3-carboxylsalicylaldehyde and furfurylamine,and its trinuclear complex [Ni3(CSF)2(CH3COO)2(DMF)2(H2O)2](2) were synthesized.Compound 1 was characterized by elemental analysis,1H NMR,IR,MS and X-ray diffraction analysis.The crystal of 1 belongs to the monoclinic system,space group P21/c with a = 8.472(2),b = 19.743(5),c = 7.2300(18) ,β = 110.278(4)°,V = 1134.4(5) 3,Z = 4,Mr = 245.23,Dc = 1.436 g·cm-3,μ = 0.108 mm-1,F(000) = 512,λ = 0.71073 ,the final R = 0.0440 and wR = 0.1199 for 1426 observed reflections(I 2σ(I)).In the crystal of 1,there exist intramolecular hydrogen bonds and weak intermolecular C-H···O hydrogen bonds.Compound 2 was characterized by elemental analysis,IR,TG and X-ray diffraction analysis.The crystal of 2 is of triclinic system,space group P1 with a = 10.1237(17),b = 10.4086(18),c = 10.4884(18) ,α = 82.528(2),β = 67.339(2),γ = 83.010(2)°,V = 1008.1(3) 3,Z = 1,Mr = 962.87,Dc = 1.586 g·cm-3,μ = 1.463 mm-1,F(000) = 498,λ = 0.71073 ,the final R = 0.0517 and wR = 0.0805 for 2065 observed reflections(I 2σ(I)).The geometry of the trinuclear molecule is centrosymmetric,in which every Ni(Ⅱ) ion is coordinated in a slightly distorted octahedron.The three Ni(Ⅱ) ions are arranged in a straight line.The two CSF2-ions act as NOO tridentate ligands with the phenolate and carboxylate oxygen as bridging atoms.The coordination atoms of CSF2-anions and water molecules are coordinated on the equatorial plane,while the two bridging acetate ions and two DMF are trans-coordinated on the apical sites.     

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 New Cd（Ⅱ） Complex with Four Nitronyl Nitroxide Radicals

A new Cd(Ⅱ) complex with four nitronyl nitroxide radicals [Cd(NIT4Py)4Cl2](NIT4Py = 2-(4'-pyridinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) has been synthesized and structurally characterized by X-ray diffraction analysis.It crystallizes in triclinic,space group P1 with a = 7.2441(4),b = 13.6964(8),c = 13.7354(8) ,α = 89.8610(10),β = 77.9180(10),γ = 87.2250(10)°,V = 1331.01(13) 3,C48H64CdCl2N12O8,Mr = 1120.41,Z = 1,Dc = 1.398 g/cm3,μ(MoKα) = 0.573 mm-1,F(000) = 582,S = 1.043,the final R = 0.0257 and wR = 0.0641 for 4333 observed reflections(I > 2σ(I)).The title complex exists in the mononuclear-metal structures,in which each Cd(Ⅱ) ion adopts a distorted octahedral geometry and is coordinated by two Cl-anions and four pyridyl-N atoms from four NIT4Py ligands.The magnetic measurements show weak antiferromagnetic interactions between the nitroxide radicals.     

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 .     

Synthesis and Crystal Structure of Cobalt(Ⅱ) and Copper(Ⅱ) Complexes Involving L-Aamino Alcohols

Two novel L-amino alcohol coordination cobalt and copper complexes I and Ⅱ were obtained separately from the direct reaction of L-plenylglycinol with Co(Ⅱ) acetate tetrahydrate in anhydrous ethanol and L-leucinol with Cu(Ⅱ) chloride dihydrate in anhydrous methanol. The structures of I and Ⅱ were determined by single-crystal X-ray diffraction and further characterized by elemental analysis and IR. For I: [Co3(C51H66N3O16)]2(OAc), monoclinic, space group P21, a = 15.022(3), b = 14.242(3), c = 28.922(6) , β = 98.944(4)o, V = 6112(2) 3, Z = 4, Dc = 1.339 g/cm3, the final R = 0.0860 for 21906 observed reflections with I 2(I). For Ⅱ: Cu2[C24H58N4O7Cl]Cl, orthorhombic, space group P212121, a = 6.1861(13), b = 20.838(4), c = 28.274(6) , V = 3644.6(13) 3, Z = 4, Dc = 1.310 g/cm3, the final R = 0.0642 for 11106 observed reflections with I 2(I). The complexes were then used to catalyze the Henry reaction and catalytic activity determined by 1H NMR.     

Two New Metal-organic Frameworks Constructed from 3,4,5-Substituted-1,2,4-Triazole Ligands

Two new complexes,[Zn（L1）2（SCN）2]·H2O（1,L1 = 3,5-dimethyl-4-p-tolyl-4H1,2,4-triazole and [Cd3（L2）6（SCN）6]（2,L2 = 3,5-dimethyl-4-phenyl-4H-1,2,4-triazole）,have been hydrothermally prepared and characterized by single-crystal X-ray diffraction,IR spectroscopy,elemental analysis and PXRD.Complex 1 crystallizes in monoclinic,space group P21 /n with a = 11.246（13）,b = 9.640（11）,c = 26.13（3）,β = 100.97（3）,V = 1108.5（3） 3,Z = 4,C24 H28 N8 OS2 Zn,Mr = 572.02,Dc = 1.366 g/cm3,μ = 1.065 mm-1,S = 0.992,F（000） = 1184,the final R = 0.0602 and wR = 0.1700 for 2925 observed reflections（I 2σ（I））.Complex 2 crystallizes in triclinic,space group P1 with a = 11.6669（3）,b = 12.0957（2）,c = 14.3674（3）,α = 105.380（3）,β = 91.020（2）,γ = 92.4100（10）o,V = 1952.30（7）3,Z = 1,C66H66N24S6Cd3,Mr = 1725.08,Dc = 1.467 g/cm3,μ = 1.025 mm-1,S = 1.037,F（000） = 870,the final R = 0.0336 and wR = 0.0946 for 7819 observed reflections（I 2σ（I））.In the title complexes,complex 1 is a mononuclear molecule where the centre Zn（II） coordinates to two 3,4,5-substituted 1,2,4-triazole ligands（L1） and two terminal SCN-anions in a tetrahedral environment while six-coordinated centre Cd（II） atoms with octahedral geometry in complex 2 are bridged by virtue of substituted 1,2,4-triazole（L2） in N1,N2-bridging mode and μ2-N,N-SCN-anions into a trinuclear molecule.     

A Novel Mononuclear Copper（Ⅱ） Complex：Crystal Structure and DNA Cleavage Ability

The reaction of N-tosylatirdine with 1,2-diaminopropane in dry benzene solution yields an intermediate H2L, N,N,N',N'-tetrakis(2-(p-tolylsulfonyl)aminoethyl) propane-1,2-diamine. The mononuclear copper(Ⅱ) complex, [CuLH2O]·H2O, was synthesized by the reaction between the intermediate and copper(Ⅱ) in absolute methanol. The complex has been characterized by IR, UV-vis and X-ray diffraction technology, and its crystal crystallizes in the orthorhombic system, space group Pbca with a = 15.589(1), b = 21.897(2), c = 27.645(2) , V = 9436.4(1) 3, Dc = 1.352 g/cm3, Z = 8, Mr = 960.68, F(000) = 4040, μ(MoKa) = 0.698 mm-1, S = 0.98, R = 0.0537 and wR = 0.1180 for 5804 observed reflections (I > 2σ(I)). In the crystal structure, a one-dimensional chain is formed by abundant hydrogen bond interactions. The interaction of the complex with DNA was monitored using agarose gel electrophoresis. The result shows that the complex can transform the supercoiled to nicked and liner forms, and has a concentration-dependent cleavage activity.     

Synthesis,Crystal Structure and Property of a Binuclear Copper Complex [Cu_2L_2(pht)_2]_2·H_2O

A new binuclear copper complex, [Cu2L2(pht)2]2·H2O(Hpht = 5,5-diphenylhydantoin, i.e. phenytoin; L = 2-diethylaminoethanol), has been synthesized by the solvothermal method, and characterized by elemental analysis, IR and single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group C2/c with a = 31.918(3), b = 12.9222(15), c = 19.868(2) , β = 98.762(2)o, V = 8098.8(16) 3, Dc = 1.429 Mg/m3, Z = 4, F(000) = 3640, μ = 1.107 mm-1, R = 0.0560 and wR = 0.1276(I 2(I)). Each copper(Ⅱ) in a molecule is coordinated with N and O atoms from ligand L and N atom from ligand Hpht in a tetradentate manner. Moreover, two copper(Ⅱ) centers are bridged by two O atoms of hydroxyl groups from two L ligands to form a slightly distorted binuclear {Cu2O2} diamond configuration. In addition, the interaction of this complex with calf thymus DNA(CT-DNA) was investigated by UV-vis spectrum and viscometry, and the complex may bind to DNA through intercalation.     

Two Amine-tethered Imidazolium NHC Ni(Ⅱ) Complexes: Synthesis,Structure and Catalytic Activity

Nickel(Ⅱ) complexes Ni(L1)2(1) and Ni(L2)2·CH3CN·H2O(2)(L1Cl = 2-(3-benzyl-2,3-dihydroimidazlo-1-yl)-N-(pyridin-2-yl)acetamide, chloride salt, L2Cl = 2-(3-naphthalene-2-ylmethyl)-2,3-dihydro-imidazlo-1-yl)-N-phenylacetamide, chloride salt) with amide-functionalized imidazolium NHC ligand were synthesized and determined by single-crystal X-ray diffraction. Complex 1 crystallizes in the monoclinic system, space group P21/c with a = 9.2561(19), b = 15.138(3), c = 20.750(4) , β = 90.216(3)°, V = 2907.3(10) 3 and Z = 4. Complex 2 crystallizes in the orthorhombic system, space group Pbca with a = 15.5469(16), b = 15.3521(15), c = 31.177(3) , V = 7441.2(13) 3 and Z = 8. They are stable in the air and formed via intermolecular weak interactions, including C–H···π contacts and C–H···O hydrogen bonds. Complex 1 was applied in Suzuki coupling reaction through the investigation of reaction conditions under the optimal choice conditions: 80 ℃, K3PO4, 3% mol catalysts, 6% mol PPh3 and toluene as solvent system could afford 96% yield in 5 h.     

Synthesis and Crystal Structure of a Di-μ_2-phenolic Bridged Binuclear Manganese(Ⅲ) Schiff Base Complex

A new complex [Mn(L)(NCS)]2·0.5CH3CN (H2L = N,N'-bis(chlorosalicylidene)-1,2-diaminoethane) has been synthesized,and its structure (C70H51Cl8Mn4N13O8S4,Mr = 1833.84) was determined by single-crystal X-ray diffraction analysis. The crystal belongs to the monoclinic system,space group C2/c with a = 25.883(2),b = 12.3320(13),c = 13.5951(16) ,β = 112.906(2),V = 3997.2(7) 3,Z = 2,Dc = 1.524 g/cm3,μ(MoKα) = 1.050mm-1,F(000) = 1852,S = 1.098,the final R = 0.0630 and wR = 0.1847 for 2542 reflections with Ⅰ 2σ(Ⅰ). The centrosymmetric title complex contains a dimer in which two distorted octahedral Mn(Ⅲ) centers are bridged equatorially by phenolic oxygen of the Schiff base ligand. The units of the complex are linked via weak C-H···N hydrogen bonds,leading to the formation of 1D chains along the b axis. The weak π-π packing interactions and weak intermolecular C(3)-H(3)···N(3) hydrogen bonds stabilize the crystal structure.     

Synthesis,Structure and Photoluminescent Property of a Cd-organic Complex [Cd（L）_2（pbda）]_n

A new complex,[Cd(L)2(pbda)]n(1,L = 3-(2-pyridyl)-4-(p-methoxyphenyl)-5-(2-thienyl)-1,2,4-triazole,H2pbda = 1,4-benzenedicarboxylic acid),has been hydrothermally prepared and characterized by single-crystal X-ray diffraction,IR spectroscopy,elemental analysis and PXRD.The complex crystallizes in monoclinic,space group P21/c with a = 8.2929(9),b = 21.668(2),c = 10.9940(11) ,β = 90.242(2)o,V = 1975.5(4) 3,Z = 2,C44H32N8O6S2Cd,Mr = 945.30,Dc = 1.589 g/cm3,μ = 0.721 mm-1,S = 1.097,F(000) = 960,the final R = 0.0590 and wR = 0.1045 for 3846 observed reflections(I > 2σ(I)).In the title complex,the rigid bridging pbda2-ligands utilize oxygen atoms of carboxylate groups to coordinate with Cd(II) atoms to form one-dimensional chains which are further interlinked into a three-dimension framework via the intermolecular weak interactions.Photoluminescence study revealed that complex 1 exhibits strong fluorescent emission band in the solid state at room temperature.     

Bis(1-(4-(dimethylamino)benzylidene)-4-phenylthiose micarbaznato)palladium(Ⅱ):Synthesis,Crystal Structure and Its Dual Fluorescence Property

The title compound bis(1-(4-(dimethylamino)benzylidene)-4-phenylthiosemicar-bazato)-palladium(Ⅱ)(PdL2) was obtained by reacting 1-(4-(dimethylamino)benzylidene)-4-phenyl-thiosemicarbazide with dichlorobis(benzonitrile)palladium(Ⅱ) in methanol,and its structure was characterized by single-crystal X-ray diffraction.The crystal of PdL2 was obtained in dimethyl-formamide(DMF) solvent with solvent molecules involved in the cell and crystallizes in the monoclinic system,space group C2 with a = 18.485(15),b = 7.090(5),c = 17.595(11) ,β = 121.21(3)o,V = 1972(2) 3,Z = 2,Mr = 847.40,Dc = 1.427 g/cm3,μ = 0.624 mm-1,F(000) = 880,R = 0.0607 and wR = 0.1358.The Pd atom adopts a distorted square planar coordination geometry with two Pd-N and two Pd-S bonds.The ligand loses a proton from its tautomeric thiol form and coordinates to the Pd atom via mercapto sulfur and the imine nitrogen atom,which binds to palladium as bidentate N,S-donors forming five-membered chelate rings.The complex formed hydrogen bonding interaction with solvent DMF molecules from the hydrogen of phenylamine to the oxygen of DMF and several intramolecular hydrogen bonds.Pd(Ⅱ) perturbed ligand π-π* transition and metal-to-ligand charge transfer(MLCT) transition are observed in its electronic absorption spectra.The complex exhibits intraligand 1π-π*(IL) state and MLCT state dual fluorescent emissions in organic solvent at room temperature.     

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 Crystal Structure of a Mixed （Phthalocyaninato）（porphyrinato） Yttrium Double-decker Complex

The title compound,a mixed(phthalocyaninato)(porphyrinato) yttrium double-decker complex 1,has been synthesized and structurally characterized by X-ray single-crystal diffraction method.Crystal data:monoclinic,space group C2/c,Z = 8,C79H52Cl10N12O4Y,Mr = 1676.74,a = 38.217(3),b = 18.9867(13),c = 26.200(3) ,β = 128.0190(10)°,V = 14977(2) 3,Dc = 1.487 g/cm3,μ(MoKα) = 1.196 mm-1,F(000) = 6808,R = 0.0745 and wR = 0.2208 for observed reflections with I > 2σ(I).X-ray analysis reveals that the coordination polyhedron adopts a slightly distorted square-antiprismatic structure around the metal center.Both phthalocyanine and porphyrin ligands are saucer-shaped,with the skew angle of the two ligand planes approximately 45°.     

Crystal Structure and Magnetic Properties of the Oxamidato-bridged Cu3 Complex Containing Macrocyclic Ligands

One novel oxamido-bridged trinuclear complex [Cu(CuL)2(ClO4)2] has been syn-thesized and structurally determined.It crystallizes in the monoclinic system,space group P21/n with a = 10.636(4),b = 11.645(4),c = 16.038(6) ,β = 91.029(5)°,V = 1986.2(12) 3,C38H32Cl2Cu3N8O12,Mr = 1054.24,Dc = 1.763 Mg/m3,μ(MoKα) = 1.802 mm-1,F(000) = 1066,Z = 2,the final R = 0.0328 and wR = 0.0882 for 3152 observed reflections.The crystal structure is a trinuclear complex in which the CuII ions are bridged by macrocyclic oxamide groups.C-H···O hydrogen bonding interactions link the trinuclear fragment to form a 2D supramolecular architecture.Magnetic measurements indicate that the compound is moderately antiferromagnetically coupled.     

Hydrothermal Synthesis,Crystal Structure and Thermal Stability Properties of the Complex [Cd_2(phen)_2(C_(14)H_(11)O_3)_4(CH_3CH_2OH)]·(CH_3OH)·(H_2O)

A dinuclear cadmium complex [Cd2(phen)2(C14H11O3)4(CH3CH2OH)]·(CH3OH)·(H2O) has been synthesized with benzilic acid and 1,10-phenanthroline by hydrothermal method.The crystal structure was determined by X-ray diffraction with crystal parameters as follows:triclinic system with space group P1,a = 1.21298(10),b = 1.32586(11),c = 2.4815(2) nm,α = 76.2630(10),β = 81.4500(10),γ = 69.1700(10)o,V = 3.6143(5) nm3,Dc = 1.438 g/cm3,Z = 1,F(000) = 1600,the final GOOF = 0.937,R = 0.0521 and wR = 0.1328.In the title complex,the dinuclear structure is defined by carboxyl oxygen atoms adopting a monodentate bridged coordination mode.The coordination environment of Cd(Ⅱ) ion is CdO4N2,giving a distorted octahedral coordination geometry.TG analysis shows that the title complex is stable under 140 ℃.     

A Novel Binuclear Cu（Ⅱ） Complex with Nitroxide Radicals Exhibiting Ferromagnetic Interactions

A new binuclear Cu(Ⅱ) complex with nitronyl nitroxide radicals [Cu(NIT3Py)2Cl2]2(NIT3Py = 2-(3'-pyridinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) has been synthesized and structurally characterized by X-ray diffraction analysis.It crystallizes in monoclinic,space group C2/c with a = 38.483(4),b = 7.2450(8),c = 27.559(3) ,β = 134.0180(10)°,V = 5525.6(10) 3,C48H64Cl4Cu2N12O8,Mr = 1206.00,Z = 4,Dc = 1.450 g/cm3,μ(MoKα) = 1.025 mm-1,F(000) = 2504,S = 1.066,the final R = 0.0471 and wR = 0.1121 for 3286 observed reflections(I > 2σ(I)).The title complex consists of centrosymmetric dinuclear units [Cu(NIT3Py)2Cl2]2,in which the copper ions are square-pyramidally coordinated by two pyridyl nitrogen atoms of two radical ligands and three chlorine anions,two of which bridge the copper ions.The magnetic measurements show ferromagnetic interactions between the copper ions and the radical ligands.     

Synthesis,Crystal Structure and Luminescent Property of an Eu~(3+) Complex

A new Eu(Ⅲ) complex, {[Eu(tta)2(C2H5OH)(NO3)]2(bmp)}·bmp(tta = 2-thenoyltrifluoro- acetonate, bmp = 2,2'-bipyrimidine), has been synthesized and characterized by elemental analysis, IR, luminescence and single-crystal X-ray diffraction analysis. The complex crystallizes in the monoclinic P21/n space group, with a = 11.894(6), b = 14.235(8), c = 19.078(10) , β = 103.423(9)o, V = 3142(3) 3, Z = 2, Mr = 1721.10, Dc = 1.819 g/cm3, F(000) = 1696, the final R = 0.0452 and wR = 0.1398 for 5375 observed reflections with I 2σ(I). In the complex, each Eu(Ⅲ) ion is coordinated with four oxygen atoms from two tta ligands and two nitrogen atoms from a bmp ligand, three oxygen atoms from one NO3- anion and one ethanol molecule, forming a distorted tricapped trigonal prism geometry. Luminescence measurement indicates that the europium complex is a strong red emitter in the solid state at room temperature.