Hydrothermal Synthesis, Crystal Structure and Magnetic Property of a Novel Pentanuclear Copper(II) Complex:[Cu_5(SIP)_2(HSIP)_2(H_2O)_(18)](H_2O)_5

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.

Synthesis, Magnetic Property and Crystal Structure of a Ytterbium-Copper Mixed Metal Complex:Yb_2Cu_3L_6·6H_2O (L=O(CH_2COO)_2)

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.

Hydrothermal Synthesis, Crystal Structure, Thermal Stability and Magnetic Properties of a Dinuclear Copper(Ⅱ) Complex

A new dinuclear copper（Ⅱ） complex [Cu（CH3COO）（C7H5N4）（H2O）]2·3.5H2 O has been hydrothermally synthesized with copper acetate, o-acetamidobenzoic acid and 3-（pyridin-2-yl）-1,2,4-triazole. It crystallizes in the monoclinic space group P21/c, with a = 12.0188（7）, b = 13.7993（8）, c = 8.7488（5） A, β = 101.7350（10）o, V = 1420.67（14） A3, D3 c = 1.568 g/cm, Z = 1, F（000） = 690, the final GOOF = 1.145, R = 0.0437, and w R = 0.1097. The crystal structure shows that the whole molecule consists of two copper ions bridged by two μ2-η1：η0 3-（pyridin-2-yl）-1,2,4-triazole anions. The coordination environment of Cu（Ⅱ） ion is Cu O2N3, giving a distorted square pyramidal geometry. The thermal stability and magnetic properties of the complex were investigated.

Synthesis, Crystal Structure and Magnetic Properties of a Novel Azide-bridged Copper(Ⅱ) Coordination Polymers Containing Nitroxy Nitroxide

A novel azide-bridged copper（Ⅱ） coordination polymer, [Cu3（NITpPy）4（N3）6]n （NITpPy = 4-pyridyl-4,4,5,5-tetramethylimidazline-3-oxide-1-oxyl）, was structurally and magnetically characterized. It crystallizes in the triclinic space group P with a = 7.6932（10）, b = 14.5556（19）, c = 16.122（2） , α = 108.443（2）, β = 95.251（2）, γ = 104.236（2）°, V = 1631.7（4） 3, C48H64Cu3N30O8, Mr = 1379.87, Z = 1, Dc = 1.404 g/cm3, μ（MoKα） = 1.041 mm-1, F（000） = 713, the R = 0.0510 and wR = 0.1185 for 4285 observed reflections with I 2σ（I）. X-ray analysis reveals that the Cu（Ⅱ） ions are linked by nitrogen atom of μ1,1 azido ligands to form a Cu-Cu-Cu unit. The units are linked by μ1,3 azido ligands through a bridging style to form a one-dimensional coordination polymer. The variable-temperature magnetic susceptibility data of the complex show ferromagnetic interactions in the complex.

Synthesis, Crystal Structure and Magnetic Properties of a One-dimensional Loop-like Iron(Ⅱ) Complex:[Fe(Haip)_2(H_2O)_2]_n (Haip = 5-Ammoniumisophthalato)

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.

Synthesis, Crystal Structure and Properties of a New Binuclear Copper(Ⅱ) Complex with 5-Oxo-4-oxa-tricyclo[4.2.1.0]nonane-9-carboxylic Acid(TNCA)

A new binuclear copper（Ⅱ） complex [Cu2（Hpt）2（TNCA）2（H2O）2]·4 H2O（1） has been synthesized with copper acetate, 5-oxo-4-oxa-tricyclo[4.2.1.0]nonane-9-carboxylic acid（TNCA） and 3-（pyridin-2-yl）-1,2,4-triazole（Hpt）. It crystallizes in the triclinic space group P-1, with a = 8.8199（18）, b = 14.278（3）, c = 15.269（3） A, α = 76.21（3）o, β = 81.07（3）o, γ = 76.07（3）o, V = 1802.7（6） A3, Dc = 1.636 g/cm3, Z = 2, F（000） = 916, the final GOOF = 1.051, R = 0.0556 and wR = 0.1388. The whole molecule consists of two copper ions bridged by two μ2-η^1：η^0-3-（pyridin-2-yl）-1,2,4-triazole anions. The coordination environment of the Cu（1） ion is CuO2N3, giving a distorted square pyramidal geometry. 1 exhibits antiferromagnetic interaction between Cu（Ⅱ） ions, the electron transfer of 1 is irreversible in electrode reactions and the TG analysis shows that 1 is stable below 440 K.

Synthesis, Crystal Structure and Magnetic Properties of a Cobalt(Ⅱ) Complex with Quinoxaline-substituted Nitronyl Nitroxide Radicals

A new complex with the formula [Co（acac）_2（NITQ）_2]×2CH_2Cl_2 1（acac = acetylacetone, NITQ = 2-（2′-quinoxalinyl）-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide）, was synthesized and elucidated structurally as well as magnetically in detail. The crystal belongs to the monoclinic system, space group P2_1/c with a = 9.6896（1）, b = 20.539（4）, c = 12.147（2） ？, β = 93.84（3）°, M_r = 997.65, V = 2412.1（8） ？~3, Z = 2, Dc = 1.374 g/cm, F（000） = 1038, m = 0.635 mm^（-1）, the final R = 0.0539 and w R = 0.1289 for 5998 observed reflections（I 〉 2σ（I））. The Co（Ⅱ） ion is coordinated by two nitrogen atoms of quinoxaline rings from two NITQs and four oxygen atoms from two acac ions to complete a distorted octahedral coordination environment. Compound 1 is further linked into a three-dimensional（3D） supramolecular network by hydrogen-bonding, Cl×××O weak contact and π···π stacking interactions. The magnetic measurements show compound 1 exhibits weak ferromagnetic interactions.

Synthesis, Crystal Structure, and Magnetic Properties of a New Dinuclear Iron Complex with Schiff Base Ligand

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.

Syntheses, Crystal Structures and Magnetic Properties of a New Nitronyl Nitroxide Radical and Its Cu(Ⅱ) Complex

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.

Hydrothermal Synthesis, Crystal Structure and Magnetic Properties of a Novel Zero-dimensional Manganese(Ⅱ) Complex with 2,2′-Diphenic Acid and 1,10-Phenanthroline Ligands

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.

A 2D Brickwall-like Copper(Ⅱ) Coordination Polymer Based on Phenyliminodiacetate and 4,4?-Bipyridine: Synthesis,Crystal Structure and Magnetic Property

A novel copper（II） coordination polymer of {[Cu3L2（4,4＂-bipy）4]（CIO4）2＂20H20}, （1） was synthesized by the reaction of H2L （C6HsN（CH2COOH）2, phenyliminodiacetic acid）, CuSO4.5H20, NaCIO4.H20 and 4,4＂-bipy （4,4＂-bipyridine） in water/methanol, followed by slow evaporating at room temperature. The compound was characterized by elemental analysis （EA）, infrared spectroscopy （IR）, thermogravimetric analysis （TGA） and single-crystal/powder X-ray diffraction. The result of single-crystal X-ray diffraction analysis reveals that 1 crystallizes in the monoclinic crystal system with C2/c space group, a = 2.9974（4）, b = 1.7270（2）, c = 2.0007（3） nm, fl = 128.793（2）°, V= 8.0722（19） nm3, Z = 4, Dc = 1.472 g.cm-3,/a = 0.942 mm-1, F（000） = 3716, R= 0.0487 and wR = 0.1204 （I 〉 20（/））. The basic structural unit of 1 is a trinuclear cluster unit of [Cu3L2]2＋, which is constructed by two #2-L2- ligands bridging and chelating three Cu（Ⅱ） ions. These [Cu3L2]2＋ units are connected with each other by 4,4＂-bipy ligands to generate a 2D cation brickwall-like network of [Cu3L2（4,4＂-bipy）4]n2n＋. These adjacent 2D cation layers are further stacked in a staggered fashion via interlayer stacking interactions to form a 3D supramolecular structure with 1D open square channels, in which the C104- counter anions and lattice water molecules are filled. Furthermore, the magnetic property of 1 was also investigated.

Synthesis,Crystal Structure,Thermal Stability,Luminescence and Magnetic Property of a New Mn^Ⅱ Coordination Polymer

One new coordination polymer, [Mn(Hbtc)(bpy)(HO)]1, was synthesized by the reaction of manganese(Ⅱ) salt under pH-controlled hydrothermal conditions with unsymmetrical polycarboxylic acid of 1,2,4-benzenetricarboxylic acid(Hbtc) and 2,2?-bipyridine(bpy). The structure of complex 1 was characterized by single-crystal X-ray diffraction, IR spectra, powder X-ray analysis, thermal gravimetric analysis(TGA), UV-Vis spectrometry, photoluminescence and magnetic susceptibility. Complex 1 is a one-dimensional(1D) polymeric single-chain structure. Photoluminescence property is quite similar to the bpy ligand. Magnetic susceptibility measurement indicates that 1 shows a weak ferromagnetic coupling between the Mn~Ⅱ ions.

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

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.

A Carboxylate-bridged Co(Ⅱ) Layer Complex： Synthesis, Structure and Magnetic Property

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.

Synthesis, Crystal Structure and Magnetic Property of Disodium Biscarbonato cobaltate(Ⅱ) Tetrahydrate, Na_2Co(CO_3)_2·4H_2O

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.

Hydrothermal Synthesis, Crystal Structure, Magnetic Properties and Network Topology of a Novel Binuclear Co(Ⅱ) Coordination Polymer_∞~1[Co_2(4,4'-bpy)_2(L)_4](bpy = Bipyridine, HL = 2-Fluorbenzoic Acid)

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.

Synthesis, Crystal Structure and Magnetic Properties of Cobalt(II) Complex Involving Imino Nitroxide Radicals

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.

Two New Copper(Ⅱ) Complexes with p-Cyanobenzoic Acid: Synthesis, Crystal Structures and Properties

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.

Dinuclear Nickel(Ⅱ) Complex with a Rare Ni(μ_2-O)_3Ni Core: Crystal Structure and Magnetic Studies

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.