Synthesis and Crystal Structure of a Co(II) Coordination Polymer Derived from a Flexible Bipyridyl Derivative Ligand

The self-assembly of a flexible bipyridyl ligand 2,2?-bis(4-pyridylmethyle- neoxy)-1,1?-biphenylene (4,4?-bpp) with cobalt(II) center gave rise to a one-dimensional chain complex [Co(μ-4,4?-bpp)2(SCN)2?H2O]n 1 which has been characterized by single-crystal X-ray diffraction. The polymer crystallizes in monoclinic, space group C2/c with unit cell parameters: a = 13.1888(13), b = 24.230(2), c = 15.4218(17) ?, β = 93.291(6)o, V = 4920.1(8) ?3, Z = 4, C50H42CoN6O5S2, Mr = 929.95, Dc = 1.255 g/cm3, F(000) = 1932 and μ(MoKα) = 0.484 mm-1. The final R and wR are 0.0691 and 0.1670 for 3746 observed reflections with I > 2σ(I). 1 possesses an infinite 1-D polymeric chain structure consisting of the repeated basic square units Co2(μ-4,4?-bpp)2, where the Co(II) center acts as the joint of the square ring. The Co(II) center is coordinated in a slightly distorted octahedral geometry with four nitrogen atoms from four different 4,4?-bpp ligands in the equatorial plane and two trans thiocyanate ligands occupying the axial positions, preventing the formation of an extended framework.

A Novel 3D Cd(II) Coordination Polymer with an Unusual 3-Connected(8~2·10) Lig Net: Synthesis, Crystal Structure and Luminescent Properties

A new 3D Cd(II) coordination polymer, [Cd(Hpidc)]n(1, H3 pidc = 2-(pyrid-2-yl)-1H-imidazole-4,5-dicarboxy acid), has been prepared and characterized by elemental analysis, IR spectra, PXRD, and single-crystal X-ray diffraction. Compound 1 crystallizes in orthorhombic, space group Fdd2 with a = 22.833(9), b = 25.536(9), c = 7.437(3) A, V = 4336(3) A3, Z = 16, Dc = 2.105 Mg·m-3, μ = 2.025 mm-1, F(000) = 2656, and the final R = 0.0261 and w R = 0.0636. The structure determination reveals that 1 exhibits a rare 3D 3-connected lig net with a point symbol of(82·10). In addition, the solid state properties such as thermogravimetric analysis and luminescence of 1 were also studied.

Hydrothermal Synthesis, Crystal Structure and Thermal Analyses of Pyrazine-2,3-dicarboxylic Acid Bridged Co(II) Coordination Polymer of _∞~2[Co(phen)(μ-L)_(3/3)]·H_2O (H_2L = Pyrazine-2,3-dicarboxylic Acid)

A novel pyrazine-2,3-dicarboxylic acid bridged Co(II) phen complex 2 ∞ [Co- (phen)(μ-L)3/3]?H2O (H2L = pyrazine-2,3-dicarboxylic acid) has been hydrothermally synthesized, and X-ray single-crystal diffraction analysis shows that it crystallizes in the monoclinic system, space group P21/n with a = 11.480(2), b = 11.885(2), c = 12.939(3) ?, β = 110.55(3)°, V = 1653.1(6) ?3, Mr = 423.25, Dc = 0.425 g/cm3, Z = 4, R = 0.0361 and wR = 0.1011. The title complex consists of 2D 2 ∞ [Co(phen)(μ-L)3/3] layers and crystal water molecules. Each Co atom is octahedrally coordinated by three N atoms and three O atoms to form 2D 2 ∞ [Co(phen)(μ-L)3/3] polymeric layers. Furthermore, such 2D layers are stacked into 3D supramolecular frameworks via Van der Waals’ intermolecular forces, strong and weak hydrogen-bond interactions. The coordination phen and crystal water molecules are resided into cavities of the frameworks.

Synthesis,Crystal Structure and Properties of a Novel Coordination Polymer Based on a Trinuclear Mn(Ⅱ) Cluster:[Mn_3(bpta)_2(bip)_2]_n

The coordination polymer, [Mn3（bpta）2（bip）2], （H3bpta = biphenyl-3,3＇,5-tricar- boxylic acid, bip = 2,6-bis（imidazole-1-yl）pyridine）, has been synthesized under hydrothermal con- ditions and characterized by elemental analysis, FT-IR, XRD, TGA and single-crystal X-ray diffraction. It crystallizes in monoclinic, space group P21/c with a = 14.919（3）, b = 9.780（2）, c = 20.352（7） A, V = 2344.4（10） A3, Z= 2, C52H32Mn3N10012, Mr = 1153.70, Dc = 1.634 g/cm3, p（MoKa） = 0.876 mm-1, F（000） = 1170, the finalR = 0.0605 and wR = 0.1177. The complex forms a 2D layer with trinuclear Mn（II） units and further assembles into a 3D supramolecular network structure through C-H..＇O hydrogen bonding and C-H...π interactions. Moreover, the negative J value indicates the presence of antiferromagnetic coupling between the Mn（II） ions within a trinuclear unit.

A Novel Three-dimensional Mn(Ⅱ) Coordination Polymer Constructed from Biphenyl-3,3',5,5'-tetracarboxylic Acid and Water

The title Mn（Ⅱ） coordination polymer,poly{[heptaaqua-（μ4-bi-phenyl-3,3？,5,5？-tetracarboxylate）-bimanganese（Ⅱ）] pentahydrate},[Mn_2（bpta）（H_2O）_7]_n·5n H_2O（I）,is crystallized from a mixture of biphenyl-3,3？,5,5？-tetracarboxylic acid（H_4bpta） and MnCl_2·4H_2O in waterethanol under room temperature. Its asymmetric unit consists of one and two halves of crystallographically independent Mn（Ⅱ） cations,one fully deprotonated H4 bpta ligand,seven coordinated water molecules and five solvent water as guest molecules. In I,each Mn（Ⅱ） atom is octahedrally coordinated by six oxygen atoms from bpta^（4-） anions and coordinated water molecules. In the Mn（Ⅱ） cations,one half Mn（Ⅱ） ion of them located at a 2-fold axis generating a trinuclear [Mn_3（H_2O）_2（RCOO）_2] linker by μ1,1-O（water） and μ1,3-O,O？（carboxylate） bridges and another half Mn（Ⅱ） ion with an inversion is a mononuclear linker. These neighbouring trinuclear and mononuclear Mn（Ⅱ） cations are linked together by biphenyl-3,3？,5,5？-tetracarboxylates to form a three-dimensional framework with a（42.84） topology of a（4,4）-connected net,in which the positions of the trinuclear [Mn_3（H_2O）_2（R-COO）_2] linker as a 4-connector linking four bpta^（4-） ligands in I reproduce an eagle-shaped arrangement. The polymeric structure exhibits a water channel with an accessible void of 797.1 ？~3,amounting to 15.7% of the total unit-cell volume. Each of the cavities in the network is occupied by solvent water molecules.

Synthesis and Crystal Structure of a Three-dimensional Mn(Ⅱ) Coordination Polymer with 3-(Pyrazin-2-yloxy)-pyridine and Azide Anion as Mixed Bridge Ligand

A three-dimensional coordination polymer [Mn2（μ1.3-N3）4（μ-PP）2]n （PP = 3-（pyrazin-2-yloxy）-pyridine） has been synthesized with 3-（pyrazin-2-yloxy）-pyridine and azide anion as mixed bridge ligand, and its crystal structure was determined by X-ray crystallography. The crystal data： triclinic system, space group P1, with a = 6.794（4）, b = 9.885（6）, c = 9.947（6） A, α = 64.170（6）, β= 84.190（8）, γ= 85.319（8）°, V = 597.7（6）A^3, Z = 1, C18H14Mn2N18O2, Mr = 624.35, Dc = 1.735 g/cm^3, F（000） = 314 and μ = 1.117 mm^-1. In the crystal, the azide anion acts as a bridge ligand and makes adjacent Mn（Ⅱ） ions connect into a two-dimensional sheet on the ab plane, then 3-（pyrazin-2-yloxy）-pyridine serves as a bidentate bridge ligand to connect neighboring sheets along

Syntheses, Crystal Structures, and Magnetic Properties of Mn(Ⅱ) and Co(Ⅱ) Coordination Polymers Constructed from Pyridine-tricarboxylate Ligand

Two coordination polymers, namely {[Mn（HL_1）（phen）]·4H_2O}_n（1） and [Co_2（HL_2）_2（H_2O）_2]_n（2） have been constructed hydrothermally using H_3L_1 and H_3L_2（H_3L_1 = 2-（5-carboxypyridin-2-yl）terephthalic acid, H_3L_2 = 2-（4-carboxypyridin-3-yl）terephthalic acid）, phen, MnCl_2×4H_2O and CoCl_2×6H_2O. The products were isolated as stable crystalline solids and were characterized by IR spectroscopy, elemental, thermogravimetric（TGA）, powder（PXRD） and single-crystal X-ray diffraction analyses. Compound 1 features a 3D framework structure, which was topologically classified as a trinodal 4,6,6-connected net with the unique topology defined by the point symbol of（3^（10）.5.6~4）4（3^（10）.6.7~4）2（5.6~2.8~2.9）. Compound 2 possesses a 2D metal-organic layer, which was topologically classified as a binodal 4,4-connected layer defined by the point symbol of（4~3.6~2.8）. The layers are further extended into a 3D supramolecular framework via hydrogen bonds. The magnetic properties for both compounds were also investigated, indicating antiferromagnetic interactions between the adjacent metal ions.

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.

Preparation, Crystal Structure and Thermal Behaviour of a One-dimensional Coordination Polymer [Mn(m-CPOAH)_2(H_2O)_2]_n

The coordination polymer of [Mn(m-CPOAH)2(H2O)2]n (m-CPOAH– = 3-carboxyl- phenoxyacetate) has been synthesized and characterized by elemental analyses, IR, TG and single- crystal X-ray diffraction. The title complex crystallizes in the triclinic system, space group P1 with a = 4.7013(9), b = 5.6822(11), c = 17.758(4) ?, α = 87.39(3), β = 85.39(3), γ = 85.76(3)o, V = 471.18(17) ?3, Z = 1, Mr = 481.26, Dc = 1.696 g/cm3, μ = 0.770 mm-1, F(000) = 247, R = 0.0385 and wR = 0.1015. The Mn(II) atom assumes a distorted octahedral geometry, involving four carboxyl oxygen atoms from different m-CPOAH– ligands and two coordinated water molecules. The Mn(II) atoms are linked by the m-CPOAH– ligand to form a one-dimensional chain structure along the a axis. The shortest Mn…Mn separation within the polymer is 7.401(4) ?. A three- dimensional supramolecular network is constructed by O–H…O hydrogen bonding interactions.

Synthesis,Crystal Structure and Characterization of a New Coordination Polymer Based on Trinuclear Mn(Ⅱ) Cluster:[Mn_3(L)_2(adip)_3]·2H_2O

The coordination polymer,[Mn3（L） 2（adip） 3]·2H2O（L = 2-（4-fluorophenyl） -1H-imidazo[4,5-f] [1,10]phenanthroline and H2adip = adipic acid） ,has been synthesized under hydro-thermal conditions and characterized by elemental analysis,IR and single-crystal X-ray diffraction. It crystallizes in triclinic,space group P1^- with a = 8.4085（11） ,b = 11.1273（14） ,c = 14.5758（18） ,α = 78.528（2） ,β = 75.425（2） ,γ = 78.143（2） °,V = 1276.0（3） A^3,Z = 1,C56H50F2Mn3N8O14,Mr = 1261.86,Dc = 1.642 g/cm^3,F（000） = 647,μ（MoKa） = 0.819 mm^-1,R = 0.0446 and wR = 0.1008. The backbones of the two types of adip dianions link the neighboring trinuclear Mn（Ⅱ） clusters to yield a two-dimensional layer structure. The large conjugated L ligands are located on both sides of the two-dimensional layers. Additionally,the O-H···O,O-H···N and N-H···O hydrogen bonds further stabilize the structure.

Crystal Structure of a Two-dimensional Coordination Polymer [Ba_2(phen)_4(tp)_2]_n

A novel two-dimensional coordination polymer [Ba2（phen）4（tp）2]n （phen = 1,10- phenanthroline, tp = terephthalic acid） has been synthesized with tp as bridge ligands and structurally determined by X-ray crystallography. The crystal belongs to the monoclinic system, space group C2/c, with a = 18.877（4）, b = 18.489（4）, c = 15.658（3） A, β = 103.61（3）°, V= 5311.5（19）A^3, C32H20O4N4Ba, Mr = 661.86, Z= 8, F（000） = 2624,μ= 1.542 mm^-1, Dc= 1.655 g/cm^3, the final R = 0.0228 and wR = 0.0554 for 6063 observed reflections （I 〉 2σ（I））. The structural analysis shows that each tp ligand bridges barium atoms to form a two-dimensional infinite layer. There are aromatic π-π stacking interactions between neighboring layers, and aromatic π-π interactions further extend such layers into a three-dimensional supramolecular framework.

A Novel Two-dimensional Lead(Ⅱ) Coordination Polymer Based on Dinuclear Lead(Ⅱ) Unit Containing(5-Chloro-quinolin-8-yloxy) Acetate

A novel two-dimensional lead（II） coordination polymer 1, [C11H7Cl2NO3Pb]n, has been prepared by solvothermal reaction of new bridging ligand（5-chloro-quinolin-8-yloxy）acetic acid（HL） with PbCl2, and its structure was characterized by IR, elemental analysis, TG-DTA and single-crystal X-ray diffraction analysis. The crystal is of monoclinic system, space group P21/c with a = 16.7603（7）, b = 8.6907（4）, c = 8.4745（3）A, β = 101.1110（11）°, C11H7Cl2NO3 Pb, Mr = 479.27, V = 1211.25（9）A3, Z = 4, Dc = 2.628 g/cm^3, F（000） = 880, μ = 14.367 mm^-1, R = 0.0173 and wR = 0.0508. The asymmetric unit contains one lead（II） cation, one（5-chloro-quinolin-8-yloxy）acetate（L） ligand and a chloride ion. The PbII center is hepta-coordinated in a distorted pentagonal bipyramidal geometry. The coordination sphere of the Pb atom is completed by two oxygen atoms and one nitrogen atom of the same L ligand, two bridging chloride ions and two bridging oxygen atoms of two adjacent L ligands. Two PbII centers are linked by the two L ligands to form a C2-symmetric dimer unit with a planar [Pb2O2] ring. Each dimer unit acts as a secondary building unit（SBU） and links adjacent four dimer units by the chloride atoms and oxygen atoms of carboxylate groups of L, forming a two-dimensional array. Such two-dimensional layers are packed through intermolecular C–H…Cl hydrogen bonds into a three-dimensional supramolecular structure. When the dimer unit is viewed as a 4-connected node, 1 is simplified as a 4-nodal 2-D network with square lattices of the diagonal lengths to be 6.079（1）A. The fluorescence emission peak of complex 1 appears near 407 nm.

Hydrothermal Synthesis and Crystal Structure of One 3D Coordination Polymer of Nickel(Ⅱ) Achieved from 5-Iodo-isophthalic Acid Ligand

A new coordination polymer [Ni（L）（m-bix）（H2O）]n （1, H2L = 5-iodo-isophthalic acid, m-bix=1,3-bis（imidazol-1-ylmethyl）-benzene） has been synthesized by the hydrothermal method and characterized by IR, elemental analysis, powder XRD and single-crystal X-ray analysis. The crystal is of triclinic, space group Pī with a = 9.1638（3）, b = 10.2319（3）, c = 13.2463（4） ？, α = 80.1710（10）, β = 83.671（2）, γ = 70.3790（10）o,C22H19NiIN4O5, Mr = 605.02, V = 1150.85（6） ？3, Dc = 1.746 g/cm3, F（000） = 600, μ = 2.225 mm-1, S = 1.045 and Z = 2. The final R = 0.0388 and wR = 0.1257 for 5089 observed reflections with I 〉 2σ（I）. In the title complex, the M and P layers are arranged alternately to give a double-layer structure by the symmetry related hydrogen bonds, and these double-layers are further joined together to achieve a 2D supramolecular architecture through I···π interaction involving iodine atoms and imidazole rings. The thermal stability of the title complex was studied by thermal gravimetric （TG） and differential thermal analysis （DTA）.

Synthesis and Crystal Structure of a 1D Coordination Polymer:{[Cu(HSSA)(py)_3]·H_2O}_n (H_3SSA =5-Sulfosalicylic Acid,py = Pyridine)

The title compound [Cu（HSSA）（py）3H2O]n （H3SSA = 5-sulfosalicylic acid, py = pyridine） I has been synthesized and structurally determined by single-crystal X-ray diffraction. I was further characterized by elemental analyses, thermogravimetric analyses, IR and UV-visible spectroscopy. The crystal belongs to the monoclinic system, space group P21/c with a = 9.4564（10）, b = 18.2679（19）, c = 15.7284（12） A,β= 126.045（4）°, V= 2196.9（4）A^3, Z= 4, Dc = 1.618 g/cm^3, Mr = 535.02,μ = 1.141 mm^-1, F（000） = 1100, 2（MoKα） = 0.71073 A, the final R = 0.0429 and wR = 0.1044 for all observed reflections. In the structure, every two Cu（II） atoms are bridged by a bivalent 5-sulfosalicylic anion to form a 1D chain-like coordination polymer. Lattice waters between chains link them to form 2D layers which are further linked by C-H…O hydrogen bonds to form a three-dimensional supramolecular network.

Crystal Structure and Thermal Stability Properties of a New 1D Chain Cu(Ⅱ)Coordination Polymer with2,3-Pyridinedicarboxylic Acid as the Ligand

A new 1D chain copper coordination polymer [CuE（H2L）2（C10HsN2）（HEO）2]n＇3n（H20） with 2,3-pyridinedi carboxylic acid （H2L） and 2,2＇-bipyridine （2,2＇-bipy） as ligands has been synthesized in the mixed ethanol and water solvents. Crystal data for this complex are as follows： monoclinic, space group P2Jc, a = 7.7713（7）, b = 27.478（3）, c = 13.2621（13）/1,, fl = 100.6940（10）, V= 2782.8（5） A3, Dc = 1.722 g/cm3, Z = 4, p = 1.61 mm-1, F（000） = 1472, the final R = 0.0363 and wR = 0.0933. In the crystal structure, the whole molecule consists of two cooper ions, two H2L, one 2,2＂-bipy molecule and six water molecules. Each central copper ion is coordinated with three oxygen atoms from two H2L and one water molecule, two nitrogen atoms from one 2,2＇-bipy molecule and two H2L, giving a distorted tetragonal pyramidal geometry. Thermal stability properties of the complex were investigated.

Hydrothermal Synthesis and Crystal Structure of a New 2D Zinc(Ⅱ) Coordination Polymer with 2-Aminoethanesulfonic Acid

A new 2D Zn（Ⅱ） coordination polymer [Zn（TAU）2]n （1, HTAU=2-aminoethane- sulfonic acid） constructed by 2-aminoethanesulfonic acid ligand has been hydrothermally synthesized by the reaction of Zn（CH3COO）2 and 2-aminoethanesulfonic acid with a 1：2 mole ratio and characterized by single-crystal X-ray diffraction, elemental analysis, infrared spectroscopy and thermogravimetric analysis. Crystal structural analysis reveals it crystallizes in monoclinic, space group P21/c with a=8.672（4）, b=6.523（3）, c=9.134（5） , β=115.441（5）°, V=466.6（4） 3, Mr=313.65, Z=2, Dc=2.232 Mg·m-3, F（000） =320, μ（MoKα）=3.091 mm-1, the final R=0.0358 and wR=0.0919 for 2026 observed reflections with Ⅰ 〉 2σ（Ⅰ）. In the structure, each zinc（Ⅱ） ion is coordinated in a slightly distorted octahedron, and each μ3-TAU– acts as a bridge to bond three neighboring Zn（Ⅱ） ions to form an infinite 2D network structure.

Synthesis and Crystal Structure of a Three-dimensional Cobalt Coordination Polymer Assembled by Ozagrel Ligands

A three-dimensional cobalt coordination polymer [Co（IMPAA）2]n（1, HIMPAA =（2E）-3-[4-（1H-imidazol-1-ylmethyl）phenyl]acrylic acid） was synthesized with ozagrel and structurally characterized by element analysis, IR, PXRD, TGA and X-ray diffraction. Complex 1 is of monoclinic system, space group P21 with a = 5.136（4）, b = 25.577（19）, c = 8.174（6） A, V = 1078.6（14） A3, Mr = 513.41, Z = 2, Dc = 1.581 g/cm3, F（000） = 686, μ = 0.840 mm-1, S = 1.119, Rint = 0.0637 and w R = 0.1456. In complex 1, four IMPAA- and four Co（II） ions form a S-shaped 52-membered macrocycle [Co4（IMPAA）4]4＋. Two carboxlate oxygen atoms link the macrocycles to form a one-dimensional chain. IMPAA- ligands bridge one-dimensional chains to yield a novel three-dimensional metal-organic framework（MOFs）. The complex is stable up to 350 ℃.

Effects of Direction of Bridging of Thiocyanato on the Dimension of Coordination Polymers: Synthesis, Characterization and Single-crystal X-ray Structure Determination of [Cd(4,4'-dm-2,2'-bpy)(NCS)_2]_n and [Cd(4,4'-dmo-2,2'-bpy)(NCS)_2]_n Coordination Pol

Two new cadmium（II）-thiocyanato coordination polymers with 4,4＇-dimethyl-2,2＇-bipyridine（4,4＇-dm-2,2＇-bpy） and 4,4＇-dimethoxy-2,2＇-bipyridine（4,4＇-dmo-2,2＇-bpy） as chelating ligands were synthesized and characterized by elemental analysis, IR and 1H NMR spectroscopy and X-ray crystallography. Thermal properties were also studied as well. These complexes have formed as [Cd（4,4＇-dm-2,2＇-bpy）（NCS）2]n（1） and [Cd（4,4＇-dmo-2,2＇-bpy）（NCS）2]n（2）. The coordination numbers of CdII in 1 and 2 are six（Cd N4S2）. Direction of bridging of thiocyanato anions in 1 and 2 created one- and two-dimensional coordination polymers, respectively. The supramolecular features in these complexes were guided and controlled by weak directional intermolecular interactions.

A New Cadmium(Ⅱ) Coordination Polymer Incorporating a 3D Framework with 1D Channels Bridged by Flexible Cyclohexane-1,2,4,5-tetracarboxylate Ligand

The hydrothermal reaction of Cd（OAc）2·2H2O, 4,4＇-bpy and cyclohexane-1,2,4,5-tetracarboxylic acid （H4L） yields a three-dimensional （3D） coordination porous framework [Cd2LI（4,4＇-bpy）1.5（H2O）2]n·2nH2O, which was characterized by single-crystal X-ray diffraction （MoKα radiation, λ = 0.71073）, elemental analysis and IR. This complex crystallizes in the monoclinic system, space group C2/c with a = 25.951（3）, b = 11.6618（12）, c = 20.046（2） A, β = 114.863（2）o, V = 5504.4（10）A^3, Z = 8, Dc = 1.900 g/cm^3, Mr = 787.30, μ = 1.615 mm^-1, F（000） = 3128, the final R = 0.0978 and wR = 0.1780. The structure of the complex is a 3D coordination Cd-carboxylate framework consisting of 1D hexagonal channels along the c-axis filled with the bridging 4,4＇-bpy ligands. The 4,4＇-bpy ligands with two kinds of conformations are located alternately in the channels through coordination and hydrogen interactions to support the whole porous framework, in which the conformation-flexible cyclohexane-1,2,4,5-tetracarboxylate ligand adopts the I （e,a,a,e） conformation and acts as a pentadentate ligand to connect five Cd（Ⅱ） atoms via the carboxylate groups in different coordination modes.

Synthesis and Characterization of a One-dimensional Chain Polymer{[Cu(4-CPOA)(3-PyOH)_2(H_2O)_2]·H_2O}_n

A novel one-dimensional copper(II) coordination polymer of {[Cu(4-CPOA)(3- PyOH)2(H2O)2]?H2O}n (4-CPOA2– = 4-carboxyphenoxyacetate dianion, 3-PyOH = 3-hydroxypyri- dine) has been synthesized and characterized by elemental analyses, IR spectra and single-crystal X-ray diffraction. The complex C19H22N2O10Cu crystallizes in triclinic system, space group P1 with a = 7.672(2), b = 18.490(4), c = 13.271(3) ?, α = 72.81(3), β = 84.64(3), γ = 87.28(3)o, V = 1026.3(4) ?3, Z = 2, Mr = 501.94, Dc = 1.624 g/cm3, μ = 1.126 mm–1, F(000) = 518, the final R = 0.0580 and wR = 0.1310 for 3364 observed reflections with I > 2σ(I). Each Cu(II) ion is coordinated with two different carboxyl O atoms from two 4-carboxyphenoxyacetate groups, two N atoms from two 3-PyOH ligands and two water molecules, residing in a distorted octahedral environment. Adjacent Cu(II) atoms are linked by bi-monodentate 4-CPOA2– groups into an one-dimensional chain along the b axis. A three-dimensional supramolecular network is constructed by O–H…O hydrogen bonds.