Reaction of hydrated ytterbium nitrate and copper nitrate with diglycolic acid at pH= 7 produced a new Yb-Cu mixed metal complex, Yb2Cu3L6. 6H2O(L= O(CH2COO)2). Complex Yb2Cu3O36C2H36 (Mr= 1437. 23) crystallized in he...Reaction of hydrated ytterbium nitrate and copper nitrate with diglycolic acid at pH= 7 produced a new Yb-Cu mixed metal complex, Yb2Cu3L6. 6H2O(L= O(CH2COO)2). Complex Yb2Cu3O36C2H36 (Mr= 1437. 23) crystallized in hexagonalP6/mcc (No. 192) with cell parameters of a= 14. 344 (3), c= 15. 470(7) A,V= 2757(2) A 3; Z= 2; F(000) = 1390; Dcalc.= 1- 731 g/cm3 μ(MoKa) =45. 8 cm-1. The final agreernent factors are R= 0. 077 and Rw = 0.089 for 867 observed reflections with I>3δ(I). It has been characterized by elemental analysis, IR spectrum, magnetic measurement and X-ray crystallography. In the complex, the Yb3+ ion is 9-coordinated tothree ether oxygen and six carboxylate oxygen atoms from three ligands, the copper ionis coordinated to four oxygen atoms from four carboxylate groups of four ligands andtwo water molecules. The Yb3+ ions and the Cu2+ ions are connected by the carboxylate groups of the ligands, thus resulting in the formation of the complicated networkstructure.展开更多
The pentanuclear complex, [Cu5(SIP)2(HSIP)2(H2O)18](H2O)5 (H3SIP = 5-sulfoisophthalic acid), has been synthesized by the hydrothermal reaction of CuCI2 with NaH2SIP at 160 ℃, and characterized by single-cry...The pentanuclear complex, [Cu5(SIP)2(HSIP)2(H2O)18](H2O)5 (H3SIP = 5-sulfoisophthalic acid), has been synthesized by the hydrothermal reaction of CuCI2 with NaH2SIP at 160 ℃, and characterized by single-crystal X-ray diffraction and IR spectrum. The crystal of the complex crystallizes in a triclinic system, space group P^-1, 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)A^°^3 Z = 1, C32H60O51S4Cu5, Mr= 1706.74, Dc= 1.825 g/cm^3,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 Cu^2+ ions are connected by two symmetry-related tddentate SIP^3- ligands and charge-balanced by two monodentate HSIP^2- 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 Cu^2+ ions.展开更多
The first triple μ2-O-bridged dinuclear Ni(II) complex, [Ni2(Flu)3](ClO4)·(H2O) (1, HFlu = 2-(2′,4′-difluorophenyl)-1,3-bis(1,2,4-triazol-1-yl)-propan-2-ol), has been synthesized and structurally...The first triple μ2-O-bridged dinuclear Ni(II) complex, [Ni2(Flu)3](ClO4)·(H2O) (1, HFlu = 2-(2′,4′-difluorophenyl)-1,3-bis(1,2,4-triazol-1-yl)-propan-2-ol), has been synthesized and structurally and magnetically characterized. Complex 1 crystallizes in monoclinic, space group P21/n with a = 12.7143(3), b = 21.3392(6), c = 17.6497(5), β = 106.142(2)o, V = 4599.8(2)3, Z = 4, μ(MoKα) = 0.975 mm-1, Dc = 1.662 g/cm3, GOF = 0.83, the final R (I 〉 2σ(I)) = 0.0503 and wR (all data) = 0.1288. In 1, three Flu anions encapsulate two nickel(II) ions bridged by three deprotonated μ2-O groups. The central alkoxo and terminal triazolyl group chelate one nickel(II) in a six-membered boat configuration. Variable temperature magnetic susceptibilities show an intramolecular anti-ferromagnetic interaction between the Ni(II) ions with J = -26.7(3) cm-1.展开更多
A new dinuclear iron(Ill) complex has been synthesized and structurally charac- terized by X-ray crystallography: [Fem2(L)(C6HsCOO)(SO4)(CH3OH)2]·CH3CN'CH3OH (1, H3L = N,N'-bis(salicylidene)q,3-di...A new dinuclear iron(Ill) complex has been synthesized and structurally charac- terized by X-ray crystallography: [Fem2(L)(C6HsCOO)(SO4)(CH3OH)2]·CH3CN'CH3OH (1, H3L = N,N'-bis(salicylidene)q,3-diamino-2-propanol). Complex 1 belongs to orthorhombic space group Pna21 with a= 11.4400(8), b = 22.9705(2), c = 12.5712(9)A, V= 3303.5(4)A3, Z= 4, F(000) = 1576, Dc= 1.531 g·cm-3, Mr= 761.36,μ = 1.007 mm-1, S = 1.014, the final R= 0.0505 and wR= 0.1018. The crystal packing is stabilized by intermolecular O-H…O hydrogen bonds, forming an extended one-dimensional chain structure. The temperature dependence of magnetic susceptibility measurement shows that antiferromagnetic interaction is propagated between the metal centers. Fit as dinuclear arrangement gave parameters ofJ= 19.7 cm-1, g = 1.89 and R2 = 0.9999.展开更多
A new complex [Zn(NIT-1′-MeBzlm)Cl2(H2O)] (NIT-1′-MeBzlm = 2-{2′-[(1′- methyl)benzimidazolyl]}-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) has been prepared and structurally characterized by X-ray diffr...A new complex [Zn(NIT-1′-MeBzlm)Cl2(H2O)] (NIT-1′-MeBzlm = 2-{2′-[(1′- methyl)benzimidazolyl]}-4,4,5,5-tetramethylimidazoline-1-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)A^3, Dc = 1.528 g/cm^3, 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.展开更多
A 2D coordination polymer, [Co(NPA)(H_2 O)_2]_n(1, H_2 NPA = 3-nitrophthalic acid), has been synthesized by solvothermal method and characterized by single-crystal X-ray diffraction analysis, FT-IR spectroscopy,...A 2D coordination polymer, [Co(NPA)(H_2 O)_2]_n(1, H_2 NPA = 3-nitrophthalic acid), has been synthesized by solvothermal method and characterized by single-crystal X-ray diffraction analysis, FT-IR spectroscopy, elemental analysis, thermogravimetric analysis and powder X-ray diffraction. Complex 1 crystallizes in orthorhombic space group Pbca with a = 7.2261(2), b = 14.6450(5), c = 19.6671(7) ?, V = 2081.31(11) ?~3, Z = 8, C_8 H_7 CoNO_8, M_r = 304.08, D_c = 1.941 mg/m^3, μ = 1.686 mm^(-1), S = 1.054, F(000) = 1224, the final R = 0.0248 and wR = 0.0603 for 1834 observed reflections(I 〉 2σ(I)). The crystal structural analysis demonstrates that the Co(Ⅱ) ions in 1 are linked by single and double μ_2-1,3-bridging carboxylate bridges, forming a 2D layer structure. Moreover, magnetic property of 1 was also discussed.展开更多
An iron(Ⅱ) coordination polymer, [Fe(Haip)2(H2O)2]n (1, Haip = 5-ammoniumiso- phthalato), has been hydro/solvothermally synthesized and characterized by single-crystal X-ray diffraction, elemental analysis, i...An iron(Ⅱ) coordination polymer, [Fe(Haip)2(H2O)2]n (1, Haip = 5-ammoniumiso- phthalato), has been hydro/solvothermally synthesized and characterized by single-crystal X-ray diffraction, elemental analysis, infrared spectrum and magnetic measurement. Compound 1 crystalizes in monoclinic, space group P2/c with a = 6.9874(14), b = 9.960(2), c = 12.894(4) A, β = 117.47(2)°, Fe(C8H6NO4)2(H2O)2, Mr = 452.16, V= 796.2(3) A3, Z = 2, Dc = 1.886 g.cm-3, p = 1.017 mm-1, F(000) = 464.0, 2.71〈0〈28.42°, R = 0.0307, wR = 0.0840 and S = 1.005. Single-crystal X-ray diffraction analysis reveals that 1 features an infinite one-dimensional loop-like chain structure and Haip ligand in 1 is of zwitterionic form. Magnetic measurement results show the dominated ferromagnetic interactions among Fe11 atoms.展开更多
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 Pi with a = 7.472...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 Pi with a = 7.472(2), b = 9.456(2), c = 13.823(3) ? a = 85.55(3), = 89.03(3), ? = 80.63(3)o, C16H22N4NiO4, Mr = 393.09, V = 960.7(3) 3, Z = 2, Dc = 1.359 g/cm3, F(000) = 412, = 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.展开更多
The title compound, Na 2Co(CO 3) 2·4H 2O, was synthesized by dropwise addition of 1.0 mL of 1 mol/L Co(CH 3COO) 2 to 50 mL of aqueous solution containing 7.0 g(66.0 mmol) of Na 2CO 3 and 2.5 g(29.8 mmol)...The title compound, Na 2Co(CO 3) 2·4H 2O, was synthesized by dropwise addition of 1.0 mL of 1 mol/L Co(CH 3COO) 2 to 50 mL of aqueous solution containing 7.0 g(66.0 mmol) of Na 2CO 3 and 2.5 g(29.8 mmol) of NaHCO 3 under stirring. A rose colored rhombohedral crystal grew by the slow evaporation of the solution of the title compoud at room temperature. The crystal structure was established on the basis of the single crystal X ray diffraction data. Na 2Co(CO 3) 2·4H 2O crystallizes in the monoclinic space group C2/c with a =0.856 6(1) nm, b =0.714 6(1) nm, c = 1 438 7(2) nm, β =97.59(1)° , V =0.873 0(2) nm 3 , D x=2.260 g/cm 3, F (000)=596, M r=296 99, μ (Mo K α)=21.06 cm -1 , Z =4 and the final R(F) =0.032 and wR(F 2) =0.068 on the basis of 947 reflections ( F 2 ≥ 2σ(F 0 2)). The crystal consists of H 2O molecules, Na + ions and 2D 2 ∞[Co(CO 3) 2] 2- layers extending parallel to (001). H 2O molecules and Na + cations are located between the 2D layers. Each Co atom is tetrahedrally coordinated by four O atoms from four CO 2- 3 groups with d (Co\_O)=0.206 5(2) nm, 0.207 6(2) nm and the angle of O\_Co\_O is in the range of 97.7(1)°—128.5(1)°. The CO 2- 3 group bridging two Co atoms via two O atoms deviates from D 3h symmetry with d (C\_O)=0.127 2(3)\_0.129 9(3) nm and the angle of O\_C\_O is in the range of 119.5(2)°\_123.4(2)°. Each Na atom, with two close Na neighbours at 0.338 4(2) nm and 0 346 7(2) nm, respectively, is octahedrally coordinated by six O atoms from four H 2O molecules and two carbonate groups belonging to two layers with d (Na\_O)=0.232 7(2)\_0.241 1(2) nm. Of two crystallographically different H 2O molecules, one forms hydrogen bonds to two CO 3 2- groups of one 2D layer, and the other to those from two different 2D layers. Na 2Co(CO 3) 2·4H 2O is antiferromagnetic below 16 K, and between 30\_300 K its magnetic behaviour obeys Curie Weiss law χ m(cm 3·mol -1 )=2.625/( T -12.1) with μ eff =4.5 B.M. at 298 K.展开更多
A novel compound [Co(IM2-Py)2(NO3)]?(NO3) (IM2-Py = 2-(2?-pyridyl)-4,4,5,5- tetramethylimidazoline-1-oxyl) has been prepared and structurally characterized by X-ray diffrac- tion method. It crystallizes in orthorhom...A novel compound [Co(IM2-Py)2(NO3)]?(NO3) (IM2-Py = 2-(2?-pyridyl)-4,4,5,5- tetramethylimidazoline-1-oxyl) has been prepared and structurally characterized by X-ray diffrac- tion method. It crystallizes in orthorhombic, space group P212121 with a = 11.031(2), b = 13.492(3), c = 20.467(4) ?, V = 3046.0(11) ?3, C24H32CoN8O8, Mr = 619.51, Z = 4, Dc = 1.351 g/cm3, μ(MoKα) = 0.620 mm?1, F(000) = 1292, R = 0.0506 and wR = 0.0845 for 3752 observed reflections with I > 2σ(I). X-ray analysis reveals that the crystal structure consists of [Co(IM2- Py)2(NO3)]+ moiety and a NO3 anion. The cobalt(II) ion is six-coordinated with a distorted octahedral geometry. Tempera- ? ture dependence of susceptibility measurements show that there exist an antiferromagnetic inter- action in the compound.展开更多
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 c...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.展开更多
Two isostructural lanthanide complexes, [Tb(salen)2]3·3C2H9N2·4CH4O(1) and [Er(salen)2]3·3C2H9N2·2CH4O(2), where H2 salen = N,N'-bis(3-methoxysalicylidene)ethylene-1,2-diamine, have been in sit...Two isostructural lanthanide complexes, [Tb(salen)2]3·3C2H9N2·4CH4O(1) and [Er(salen)2]3·3C2H9N2·2CH4O(2), where H2 salen = N,N'-bis(3-methoxysalicylidene)ethylene-1,2-diamine, have been in situ synthesized under solvothermal conditions and characterized by IR, elemental analysis, powder and single-crystal X-ray diffraction analysis, and magnetic analysis. Single-crystal X-ray diffraction indicates that the complexes crystallize in monoclinic C121 space group. Each lanthanide center is coordinated with four oxygen and four nitrogen atoms from two salen^2- ligands, forming distorted square antiprism geometry. Both 1 and 2 exhibit obvious slow magnetization relaxation under an applied 2 kOe magnetic field.展开更多
A novel metal-organic coordination polymer [Mn3(2,2′-dipha)3(phen)6]n·3nH2O (2,2′-dipha = 2,2′-diphenic acid, phen = 1,10-phenanthroline) 1 has been hydrothermally synthesized and structurally characteri...A novel metal-organic coordination polymer [Mn3(2,2′-dipha)3(phen)6]n·3nH2O (2,2′-dipha = 2,2′-diphenic acid, phen = 1,10-phenanthroline) 1 has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analyses, IR spectroscopy, and magnetic susceptibility measurements. The crystal crystallizes in triclinic, space group P1 with a = 16.921(5), b = 18.307(5), c = 18.450(5)A , α = 113.369(5), β = 108.529(5), γ = 102.984(5)°, V = 4553(2)A^ 3, C114H72Mn3N12O14.25, Mr = 2002.66, Dc = 1.461 g/cm^3, μ(MoKα) = 0.488 mm^-1, the final F(000) = 2058, Z = 2, R = 0.0491 and wR = 0.0980 for 9087 observed reflections (I 〉 2σ(I)). In the crystal structure, the manganese atom is six-coordinated with two carboxylate oxygen atoms from different carboxylate groups of the same dipha and four nitrogen atoms from two different phen ligands, showing a slightly distorted octahedral geometry. Fur- thermore, it exhibits a zero-dimensional structure with dipha-Mn-phen- as building units. Variable- temperature magnetic measure shows an overall anti-ferromagnetic behavior for compound 1.展开更多
The structure of the title complex [Fe2(μ-O)(bpb)2]n (bpb 2=1,2-bis(pyridine-2carboxamido) benzenate) has been characterized by single-crystal X-ray diffraction analysis.The complex (C36 H24 Fe2N8O5,Mr=760.3...The structure of the title complex [Fe2(μ-O)(bpb)2]n (bpb 2=1,2-bis(pyridine-2carboxamido) benzenate) has been characterized by single-crystal X-ray diffraction analysis.The complex (C36 H24 Fe2N8O5,Mr=760.33) crystallizes in the monoclinic space group P2 1/c with a=8.4615(17),b=33.704(7),c=11.173(2),β=91.12(3)o,V=3185.7(11)3,Z=4,D c=1.585 g/cm 3,μ(MoK)=0.970 mm-1,F(000)=1552,R int=0.0381,the final R=0.0454 and wR=0.1114.The magnetic susceptibilities of the complex have been examined in the temperature range of 2-300 K.The magnetic data were fitted to give the parameters of J d=-77.7(9) and J c=-11.5(6) cm-1.展开更多
A new 3-D nickel(Ⅱ) metal-organic framework(MOFs) with formula [Ni(bib)_2(SO_4)]_n(1), where bib = 1,4-bis(imidazol-1-yl)benzene, has been synthesized and characterized by single-crystal X-ray diffraction...A new 3-D nickel(Ⅱ) metal-organic framework(MOFs) with formula [Ni(bib)_2(SO_4)]_n(1), where bib = 1,4-bis(imidazol-1-yl)benzene, has been synthesized and characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis and surface photovoltage spectroscopy(SPS). Complex 1 crystallizes in monoclinic system, space group C2/c with a = 19.5988(6), b = 9.7531(3), c = 11.8146(4) ?, β = 96.185(3)°, V = 2245.20(12) ?~3, C_(24)H_(20)N_8NiO_4S, M_r = 575.25, D_c = 1.702 g/cm^3, Z = 4, F(000) = 1184, μ = 1.011 mm-1, the final R = 0.0293 and w R = 0.0702. X-ray diffraction analyses indicated that the center Ni^(2+) ion is six-coordinated with an O_2N_4 donor set of two μ_2-SO_4^(2–) and four bib ligands, resulting in an ideal octahedral geometry. Topological analysis on complex 1 considers each Ni^(2+) as a 6-connected node, while bib and sulfate ion as linkers, giving an α-Po topology with short Schl?fli symbol 412·63. In the crystal packing, the components interact with pairs of intermolecular C–H×××O hydrogen bonds. The SPS of 1 indicates that there are positive response bands in the range of 300~600 nm showing photo-electric conversion properties.展开更多
A new nickel(Ⅱ) coordination complex [Ni(2,2'-bipy)2(ClC6H4COO)(H2O)](ClO4) was synthesized by self-assembly reaction of m-chlorobenzoic acid, 2,2'-bipy and Ni(ClQ4h·6H2O. The crystal of the title c...A new nickel(Ⅱ) coordination complex [Ni(2,2'-bipy)2(ClC6H4COO)(H2O)](ClO4) was synthesized by self-assembly reaction of m-chlorobenzoic acid, 2,2'-bipy and Ni(ClQ4h·6H2O. The crystal of the title compound belongs to monoclinic system, space group P2(1/n) with a = 0.77764(14), b = 2.6572(5), c = 1.3637(2) nm, β = 96.456(3)°, V= 2.8000(9) nm^3, D,, = 1.528 g/cm^3, Z = 4, Mr = 644.10, μ(MoKα) = 0.937 mm^-1, F(000) =1320, R = 0.0549 and wR = 0.1164. Structure analysis shows that the nickel(Ⅱ) ion is coordinated with four nitrogen atoms from two bipys as well as two oxygen atoms from m-chlorobenzoic acid and water, respectively, giving a distorted octahedral coordination geometry. The cyclic voltametric behavior of the complex is also presented.展开更多
The complexes of [Cu(bpy)(H2O)(CBA)2]n 1 and [Cu(phen)(H2O)(CBA)2]·H2O 2 based on p-cyanobenzoic acid (HCBA) have been synthesized in aqueous ethanolic solution at room temperature. The single-cryst...The complexes of [Cu(bpy)(H2O)(CBA)2]n 1 and [Cu(phen)(H2O)(CBA)2]·H2O 2 based on p-cyanobenzoic acid (HCBA) have been synthesized in aqueous ethanolic solution at room temperature. The single-crystal X-ray diffraction studies demonstrated that complex 1 crystallizes in orthorhombic and complex 2 is of triclinic system. The results indicate the complex 1 shows a 1D chain structure bridged bytwo carboxylic oxygen atoms from CBA–, and complex 2 is a mononuclear structure. Through intermolecular hydrogen bonding and π···π stacking interactions, the complexes are assembled into supramolecular structures.Complex 1 has been characterized by magnetic measurements. Themagnetic measurement indicates that weak ferromagnetic interaction (zJ' = 0.038(5)) between the Cu^2+ ions is dominant in the structure. The IR spectrum and results of thermal and elemental analyses are also presented.展开更多
One novel binuclear Co(Ⅱ) coordination polymer ∞ [Co2(4,4'-bpy)2(L)4] (1, bpy = bipyridine, HL = 2-fluorbenzoic acid) has been hydrothermally synthesized and structurally characterized by elemental analysis...One novel binuclear Co(Ⅱ) coordination polymer ∞ [Co2(4,4'-bpy)2(L)4] (1, bpy = bipyridine, HL = 2-fluorbenzoic acid) has been hydrothermally synthesized and structurally characterized by elemental analysis, IR and X-ray single-crystal diffraction. Complex 1 crystallizes in the monoclinic system, space group P21/c with a = 11.163(2), b = 21.943(4), c = 9.6381(19) A, β = 113.92(3)°, V= 2158.2(7) A3, Z= 4, Dc = 1.518 g/cm^3, Mr = 493.31, F(000) =1004, R = 0.0303 and wR = 0.0808 for 3614 observed reflections (I〉 2σ(I)). Complex I exhibits a 3D Schlafli symbol (4.62)(4.66.83) topological framework, and the magnetic characterization shows weak antiferromagnetic coupling exchange between two Co ions.展开更多
A new nickel(II) complex [NiL2](DMF)4 (HL = 2'-[4-N,N'-(dimethylamino- benzylidene)]-3,5-dihydroxybenzoylhydrazide) has been synthesized and its structure was characterized by IR,UV-Vis,1H NMR and elemental ...A new nickel(II) complex [NiL2](DMF)4 (HL = 2'-[4-N,N'-(dimethylamino- benzylidene)]-3,5-dihydroxybenzoylhydrazide) has been synthesized and its structure was characterized by IR,UV-Vis,1H NMR and elemental analysis. The fluorescence emission mechanism of the complex was discussed by fluorimetric spectra. The single-crystal structure was determined by X-ray diffraction analysis. The crystal belongs to the triclinic system,space group P1 with a = 0.9918(4),b = 1.1297(4),c = 1.1331(4) nm,α = 76.860(7),β = 75.105(6),γ = 89.022(7)°,V = 1.1936(8) nm^3,Z = 1,μ = 0.472 mm^-1,Dc = 1.319 g/cm^3,F(000) = 502 and Rint = 0.0913. In the title compound,the nickel(II) atom is four-coordinated with two nitrogen atoms from amide and two oxygen atoms from keto group. The complex is centrosymmetric with nickel located at the center.展开更多
文摘Reaction of hydrated ytterbium nitrate and copper nitrate with diglycolic acid at pH= 7 produced a new Yb-Cu mixed metal complex, Yb2Cu3L6. 6H2O(L= O(CH2COO)2). Complex Yb2Cu3O36C2H36 (Mr= 1437. 23) crystallized in hexagonalP6/mcc (No. 192) with cell parameters of a= 14. 344 (3), c= 15. 470(7) A,V= 2757(2) A 3; Z= 2; F(000) = 1390; Dcalc.= 1- 731 g/cm3 μ(MoKa) =45. 8 cm-1. The final agreernent factors are R= 0. 077 and Rw = 0.089 for 867 observed reflections with I>3δ(I). It has been characterized by elemental analysis, IR spectrum, magnetic measurement and X-ray crystallography. In the complex, the Yb3+ ion is 9-coordinated tothree ether oxygen and six carboxylate oxygen atoms from three ligands, the copper ionis coordinated to four oxygen atoms from four carboxylate groups of four ligands andtwo water molecules. The Yb3+ ions and the Cu2+ ions are connected by the carboxylate groups of the ligands, thus resulting in the formation of the complicated networkstructure.
基金Supported by the Education Department of Jiangxi Province (No. 2007-125)Jiangxi Normal University
文摘The pentanuclear complex, [Cu5(SIP)2(HSIP)2(H2O)18](H2O)5 (H3SIP = 5-sulfoisophthalic acid), has been synthesized by the hydrothermal reaction of CuCI2 with NaH2SIP at 160 ℃, and characterized by single-crystal X-ray diffraction and IR spectrum. The crystal of the complex crystallizes in a triclinic system, space group P^-1, 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)A^°^3 Z = 1, C32H60O51S4Cu5, Mr= 1706.74, Dc= 1.825 g/cm^3,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 Cu^2+ ions are connected by two symmetry-related tddentate SIP^3- ligands and charge-balanced by two monodentate HSIP^2- 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 Cu^2+ ions.
基金Supported by the Fundamental Research Funds for the Central Universities (2009ZM0314 and 2011ZZ08)
文摘The first triple μ2-O-bridged dinuclear Ni(II) complex, [Ni2(Flu)3](ClO4)·(H2O) (1, HFlu = 2-(2′,4′-difluorophenyl)-1,3-bis(1,2,4-triazol-1-yl)-propan-2-ol), has been synthesized and structurally and magnetically characterized. Complex 1 crystallizes in monoclinic, space group P21/n with a = 12.7143(3), b = 21.3392(6), c = 17.6497(5), β = 106.142(2)o, V = 4599.8(2)3, Z = 4, μ(MoKα) = 0.975 mm-1, Dc = 1.662 g/cm3, GOF = 0.83, the final R (I 〉 2σ(I)) = 0.0503 and wR (all data) = 0.1288. In 1, three Flu anions encapsulate two nickel(II) ions bridged by three deprotonated μ2-O groups. The central alkoxo and terminal triazolyl group chelate one nickel(II) in a six-membered boat configuration. Variable temperature magnetic susceptibilities show an intramolecular anti-ferromagnetic interaction between the Ni(II) ions with J = -26.7(3) cm-1.
基金Supported by the Natural Science Foundation of Mongolian Autonomous Region,China(No.2014MS0215)
文摘A new dinuclear iron(Ill) complex has been synthesized and structurally charac- terized by X-ray crystallography: [Fem2(L)(C6HsCOO)(SO4)(CH3OH)2]·CH3CN'CH3OH (1, H3L = N,N'-bis(salicylidene)q,3-diamino-2-propanol). Complex 1 belongs to orthorhombic space group Pna21 with a= 11.4400(8), b = 22.9705(2), c = 12.5712(9)A, V= 3303.5(4)A3, Z= 4, F(000) = 1576, Dc= 1.531 g·cm-3, Mr= 761.36,μ = 1.007 mm-1, S = 1.014, the final R= 0.0505 and wR= 0.1018. The crystal packing is stabilized by intermolecular O-H…O hydrogen bonds, forming an extended one-dimensional chain structure. The temperature dependence of magnetic susceptibility measurement shows that antiferromagnetic interaction is propagated between the metal centers. Fit as dinuclear arrangement gave parameters ofJ= 19.7 cm-1, g = 1.89 and R2 = 0.9999.
基金supported by the National Natural Science Foundation of China (Nos. 20471026 and 20771054)the Henan Tackle Key Problem of Science and Technology (No. 0524220001)
文摘A new complex [Zn(NIT-1′-MeBzlm)Cl2(H2O)] (NIT-1′-MeBzlm = 2-{2′-[(1′- methyl)benzimidazolyl]}-4,4,5,5-tetramethylimidazoline-1-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)A^3, Dc = 1.528 g/cm^3, 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.
基金supported financially by the Scientific Research Program Funded by Shaanxi Provincial Education Department(No.16JK1598,16JK1612,17JK0606)the Natural Science Foundation of Shaanxi Province(No.2017JQ2009)
文摘A 2D coordination polymer, [Co(NPA)(H_2 O)_2]_n(1, H_2 NPA = 3-nitrophthalic acid), has been synthesized by solvothermal method and characterized by single-crystal X-ray diffraction analysis, FT-IR spectroscopy, elemental analysis, thermogravimetric analysis and powder X-ray diffraction. Complex 1 crystallizes in orthorhombic space group Pbca with a = 7.2261(2), b = 14.6450(5), c = 19.6671(7) ?, V = 2081.31(11) ?~3, Z = 8, C_8 H_7 CoNO_8, M_r = 304.08, D_c = 1.941 mg/m^3, μ = 1.686 mm^(-1), S = 1.054, F(000) = 1224, the final R = 0.0248 and wR = 0.0603 for 1834 observed reflections(I 〉 2σ(I)). The crystal structural analysis demonstrates that the Co(Ⅱ) ions in 1 are linked by single and double μ_2-1,3-bridging carboxylate bridges, forming a 2D layer structure. Moreover, magnetic property of 1 was also discussed.
基金supported by the Scientific Research Start-up Funds of Shangrao Normal Universitythe Fourth Characteristic Specialty Foundation of University from Ministry of Education(TS11524)the Natural Science Foundation of Jiangxi Province(No.20122BAB203002)
文摘An iron(Ⅱ) coordination polymer, [Fe(Haip)2(H2O)2]n (1, Haip = 5-ammoniumiso- phthalato), has been hydro/solvothermally synthesized and characterized by single-crystal X-ray diffraction, elemental analysis, infrared spectrum and magnetic measurement. Compound 1 crystalizes in monoclinic, space group P2/c with a = 6.9874(14), b = 9.960(2), c = 12.894(4) A, β = 117.47(2)°, Fe(C8H6NO4)2(H2O)2, Mr = 452.16, V= 796.2(3) A3, Z = 2, Dc = 1.886 g.cm-3, p = 1.017 mm-1, F(000) = 464.0, 2.71〈0〈28.42°, R = 0.0307, wR = 0.0840 and S = 1.005. Single-crystal X-ray diffraction analysis reveals that 1 features an infinite one-dimensional loop-like chain structure and Haip ligand in 1 is of zwitterionic form. Magnetic measurement results show the dominated ferromagnetic interactions among Fe11 atoms.
基金This work was supported bythe Natural Science Foundation of Shandong Province (No. Y2002B06) and Science Research Foundation of Qingdao University of Science and Technology (No. 03Z08)
文摘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 Pi with a = 7.472(2), b = 9.456(2), c = 13.823(3) ? a = 85.55(3), = 89.03(3), ? = 80.63(3)o, C16H22N4NiO4, Mr = 393.09, V = 960.7(3) 3, Z = 2, Dc = 1.359 g/cm3, F(000) = 412, = 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.
文摘The title compound, Na 2Co(CO 3) 2·4H 2O, was synthesized by dropwise addition of 1.0 mL of 1 mol/L Co(CH 3COO) 2 to 50 mL of aqueous solution containing 7.0 g(66.0 mmol) of Na 2CO 3 and 2.5 g(29.8 mmol) of NaHCO 3 under stirring. A rose colored rhombohedral crystal grew by the slow evaporation of the solution of the title compoud at room temperature. The crystal structure was established on the basis of the single crystal X ray diffraction data. Na 2Co(CO 3) 2·4H 2O crystallizes in the monoclinic space group C2/c with a =0.856 6(1) nm, b =0.714 6(1) nm, c = 1 438 7(2) nm, β =97.59(1)° , V =0.873 0(2) nm 3 , D x=2.260 g/cm 3, F (000)=596, M r=296 99, μ (Mo K α)=21.06 cm -1 , Z =4 and the final R(F) =0.032 and wR(F 2) =0.068 on the basis of 947 reflections ( F 2 ≥ 2σ(F 0 2)). The crystal consists of H 2O molecules, Na + ions and 2D 2 ∞[Co(CO 3) 2] 2- layers extending parallel to (001). H 2O molecules and Na + cations are located between the 2D layers. Each Co atom is tetrahedrally coordinated by four O atoms from four CO 2- 3 groups with d (Co\_O)=0.206 5(2) nm, 0.207 6(2) nm and the angle of O\_Co\_O is in the range of 97.7(1)°—128.5(1)°. The CO 2- 3 group bridging two Co atoms via two O atoms deviates from D 3h symmetry with d (C\_O)=0.127 2(3)\_0.129 9(3) nm and the angle of O\_C\_O is in the range of 119.5(2)°\_123.4(2)°. Each Na atom, with two close Na neighbours at 0.338 4(2) nm and 0 346 7(2) nm, respectively, is octahedrally coordinated by six O atoms from four H 2O molecules and two carbonate groups belonging to two layers with d (Na\_O)=0.232 7(2)\_0.241 1(2) nm. Of two crystallographically different H 2O molecules, one forms hydrogen bonds to two CO 3 2- groups of one 2D layer, and the other to those from two different 2D layers. Na 2Co(CO 3) 2·4H 2O is antiferromagnetic below 16 K, and between 30\_300 K its magnetic behaviour obeys Curie Weiss law χ m(cm 3·mol -1 )=2.625/( T -12.1) with μ eff =4.5 B.M. at 298 K.
基金This work was supported by the National Natural Science Foundation of China (No. 20471026) and Natural Science Foundation of Henan Province (No. 0311021200)
文摘A novel compound [Co(IM2-Py)2(NO3)]?(NO3) (IM2-Py = 2-(2?-pyridyl)-4,4,5,5- tetramethylimidazoline-1-oxyl) has been prepared and structurally characterized by X-ray diffrac- tion method. It crystallizes in orthorhombic, space group P212121 with a = 11.031(2), b = 13.492(3), c = 20.467(4) ?, V = 3046.0(11) ?3, C24H32CoN8O8, Mr = 619.51, Z = 4, Dc = 1.351 g/cm3, μ(MoKα) = 0.620 mm?1, F(000) = 1292, R = 0.0506 and wR = 0.0845 for 3752 observed reflections with I > 2σ(I). X-ray analysis reveals that the crystal structure consists of [Co(IM2- Py)2(NO3)]+ moiety and a NO3 anion. The cobalt(II) ion is six-coordinated with a distorted octahedral geometry. Tempera- ? ture dependence of susceptibility measurements show that there exist an antiferromagnetic inter- action in the compound.
基金the National Natural Science Foundation of China (No. 20471026)Natural Science Foundation of Henan Province (No. 0311021200) the Foundation of Education Committee of Henan Province (2006150017)
文摘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.
基金supported by the National Natural Science Foundation of China(21101090 and 21561021)
文摘Two isostructural lanthanide complexes, [Tb(salen)2]3·3C2H9N2·4CH4O(1) and [Er(salen)2]3·3C2H9N2·2CH4O(2), where H2 salen = N,N'-bis(3-methoxysalicylidene)ethylene-1,2-diamine, have been in situ synthesized under solvothermal conditions and characterized by IR, elemental analysis, powder and single-crystal X-ray diffraction analysis, and magnetic analysis. Single-crystal X-ray diffraction indicates that the complexes crystallize in monoclinic C121 space group. Each lanthanide center is coordinated with four oxygen and four nitrogen atoms from two salen^2- ligands, forming distorted square antiprism geometry. Both 1 and 2 exhibit obvious slow magnetization relaxation under an applied 2 kOe magnetic field.
基金The project was supported by the Education Office of Jilin Province (No. 0047)
文摘A novel metal-organic coordination polymer [Mn3(2,2′-dipha)3(phen)6]n·3nH2O (2,2′-dipha = 2,2′-diphenic acid, phen = 1,10-phenanthroline) 1 has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analyses, IR spectroscopy, and magnetic susceptibility measurements. The crystal crystallizes in triclinic, space group P1 with a = 16.921(5), b = 18.307(5), c = 18.450(5)A , α = 113.369(5), β = 108.529(5), γ = 102.984(5)°, V = 4553(2)A^ 3, C114H72Mn3N12O14.25, Mr = 2002.66, Dc = 1.461 g/cm^3, μ(MoKα) = 0.488 mm^-1, the final F(000) = 2058, Z = 2, R = 0.0491 and wR = 0.0980 for 9087 observed reflections (I 〉 2σ(I)). In the crystal structure, the manganese atom is six-coordinated with two carboxylate oxygen atoms from different carboxylate groups of the same dipha and four nitrogen atoms from two different phen ligands, showing a slightly distorted octahedral geometry. Fur- thermore, it exhibits a zero-dimensional structure with dipha-Mn-phen- as building units. Variable- temperature magnetic measure shows an overall anti-ferromagnetic behavior for compound 1.
基金supported by the Natural Science Foundation of China (No. 2117624)the Fundamental Research Funds for the Central Universities (China University of Mining and Technology)
文摘The structure of the title complex [Fe2(μ-O)(bpb)2]n (bpb 2=1,2-bis(pyridine-2carboxamido) benzenate) has been characterized by single-crystal X-ray diffraction analysis.The complex (C36 H24 Fe2N8O5,Mr=760.33) crystallizes in the monoclinic space group P2 1/c with a=8.4615(17),b=33.704(7),c=11.173(2),β=91.12(3)o,V=3185.7(11)3,Z=4,D c=1.585 g/cm 3,μ(MoK)=0.970 mm-1,F(000)=1552,R int=0.0381,the final R=0.0454 and wR=0.1114.The magnetic susceptibilities of the complex have been examined in the temperature range of 2-300 K.The magnetic data were fitted to give the parameters of J d=-77.7(9) and J c=-11.5(6) cm-1.
基金supported by the Guangxi Provincial Department of Education(No.KY2015ZD130,YB2014414)the Natural Science Foundation of Guangxi Province(No.2014GXNSFBA118040)+2 种基金The supports of the National Natural Science Foundation of China(No.51402158)are gratefully acknowledgedthe financial support by the Opening Project of Guangxi Colleges and Universities Key Laboratory of Beibu Gulf Oil and Natural Gas Resource Effective Utilization(No.2015KLOG09)the financial support from the Natural Science Foundation of Qinzhou University(No.2014PY-GJ05)
文摘A new 3-D nickel(Ⅱ) metal-organic framework(MOFs) with formula [Ni(bib)_2(SO_4)]_n(1), where bib = 1,4-bis(imidazol-1-yl)benzene, has been synthesized and characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis and surface photovoltage spectroscopy(SPS). Complex 1 crystallizes in monoclinic system, space group C2/c with a = 19.5988(6), b = 9.7531(3), c = 11.8146(4) ?, β = 96.185(3)°, V = 2245.20(12) ?~3, C_(24)H_(20)N_8NiO_4S, M_r = 575.25, D_c = 1.702 g/cm^3, Z = 4, F(000) = 1184, μ = 1.011 mm-1, the final R = 0.0293 and w R = 0.0702. X-ray diffraction analyses indicated that the center Ni^(2+) ion is six-coordinated with an O_2N_4 donor set of two μ_2-SO_4^(2–) and four bib ligands, resulting in an ideal octahedral geometry. Topological analysis on complex 1 considers each Ni^(2+) as a 6-connected node, while bib and sulfate ion as linkers, giving an α-Po topology with short Schl?fli symbol 412·63. In the crystal packing, the components interact with pairs of intermolecular C–H×××O hydrogen bonds. The SPS of 1 indicates that there are positive response bands in the range of 300~600 nm showing photo-electric conversion properties.
基金Supported by the Foundation of Education Committee of Hunan Province (No. 05C001)
文摘A new nickel(Ⅱ) coordination complex [Ni(2,2'-bipy)2(ClC6H4COO)(H2O)](ClO4) was synthesized by self-assembly reaction of m-chlorobenzoic acid, 2,2'-bipy and Ni(ClQ4h·6H2O. The crystal of the title compound belongs to monoclinic system, space group P2(1/n) with a = 0.77764(14), b = 2.6572(5), c = 1.3637(2) nm, β = 96.456(3)°, V= 2.8000(9) nm^3, D,, = 1.528 g/cm^3, Z = 4, Mr = 644.10, μ(MoKα) = 0.937 mm^-1, F(000) =1320, R = 0.0549 and wR = 0.1164. Structure analysis shows that the nickel(Ⅱ) ion is coordinated with four nitrogen atoms from two bipys as well as two oxygen atoms from m-chlorobenzoic acid and water, respectively, giving a distorted octahedral coordination geometry. The cyclic voltametric behavior of the complex is also presented.
基金supported by the K.C.Wong Magna Fund in Ningbo University
文摘The complexes of [Cu(bpy)(H2O)(CBA)2]n 1 and [Cu(phen)(H2O)(CBA)2]·H2O 2 based on p-cyanobenzoic acid (HCBA) have been synthesized in aqueous ethanolic solution at room temperature. The single-crystal X-ray diffraction studies demonstrated that complex 1 crystallizes in orthorhombic and complex 2 is of triclinic system. The results indicate the complex 1 shows a 1D chain structure bridged bytwo carboxylic oxygen atoms from CBA–, and complex 2 is a mononuclear structure. Through intermolecular hydrogen bonding and π···π stacking interactions, the complexes are assembled into supramolecular structures.Complex 1 has been characterized by magnetic measurements. Themagnetic measurement indicates that weak ferromagnetic interaction (zJ' = 0.038(5)) between the Cu^2+ ions is dominant in the structure. The IR spectrum and results of thermal and elemental analyses are also presented.
基金supported by the National Natural Science Foundation of China(51343003)the Scientific Research Projects of Zhejiang Provincial Education Department(Y201224707)
文摘One novel binuclear Co(Ⅱ) coordination polymer ∞ [Co2(4,4'-bpy)2(L)4] (1, bpy = bipyridine, HL = 2-fluorbenzoic acid) has been hydrothermally synthesized and structurally characterized by elemental analysis, IR and X-ray single-crystal diffraction. Complex 1 crystallizes in the monoclinic system, space group P21/c with a = 11.163(2), b = 21.943(4), c = 9.6381(19) A, β = 113.92(3)°, V= 2158.2(7) A3, Z= 4, Dc = 1.518 g/cm^3, Mr = 493.31, F(000) =1004, R = 0.0303 and wR = 0.0808 for 3614 observed reflections (I〉 2σ(I)). Complex I exhibits a 3D Schlafli symbol (4.62)(4.66.83) topological framework, and the magnetic characterization shows weak antiferromagnetic coupling exchange between two Co ions.
基金Project supported by the Natural Science Foundation of Zhejiang Province (Y406049)Education Committee Foundation of Zhejiang Province (No. 20060079)
文摘A new nickel(II) complex [NiL2](DMF)4 (HL = 2'-[4-N,N'-(dimethylamino- benzylidene)]-3,5-dihydroxybenzoylhydrazide) has been synthesized and its structure was characterized by IR,UV-Vis,1H NMR and elemental analysis. The fluorescence emission mechanism of the complex was discussed by fluorimetric spectra. The single-crystal structure was determined by X-ray diffraction analysis. The crystal belongs to the triclinic system,space group P1 with a = 0.9918(4),b = 1.1297(4),c = 1.1331(4) nm,α = 76.860(7),β = 75.105(6),γ = 89.022(7)°,V = 1.1936(8) nm^3,Z = 1,μ = 0.472 mm^-1,Dc = 1.319 g/cm^3,F(000) = 502 and Rint = 0.0913. In the title compound,the nickel(II) atom is four-coordinated with two nitrogen atoms from amide and two oxygen atoms from keto group. The complex is centrosymmetric with nickel located at the center.