Synthesis and Crystal Structure of a Three-dimensional Manganese(Ⅱ)Complex (tataH)2[Mn(pydc)2]·4H2O(tata= 2,4,6-Triamino-1,3,4,-triazine,pydcH2= Pyridine-2,6-dicarboxylic Acid)

A manganese(Ⅱ) complex (tataH)2[Mn(pydc)2]·4H2O (C20H28MnN14O12, Mr = 711.50, tata = 2,4,6-triamino-1,3,5-triazine, pydcH2 = pyridine-2,6-dicarboxylic acid) has been synthesized and its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to the triclinic system, space group P1, with a = 9.9847(3), b = 10.9813(3), c = 15.2616(5) (A), α =101.5310(10), β = 90.2610(10), γ = 116.4600(10)°, V = 1459.44(8) A3, Z = 2, Dc = 1.619 g/cm3, μ = 0.539 mm-1, F(000) = 734, the final R = 0.0292 and wR = 0.0745. In the crystal the MnⅡ atom is six-coordinated by four carbonyl oxygen atoms and two pyridine nitrogen atoms from two tridentate H-bonded tetramer. The molecules are packed in a three-dimensional framework structure by the combination of O-H…O,N-H…O and N-H…N hydrogen bonds between (tataH) ,[Mn(pydc)2]2- and crystal water.     

Synthesis and Crystal Structure of a Three-dimensional Manganese(II) Complex (tataH)_2[Mn(pydc)_2]·4H_2O (tata = 2,4,6-Triamino-1,3,5-triazine, pydcH_2 = Pyridine-2,6-dicarboxylic Acid)

A manganese(II) complex (tataH)2[Mn(pydc)2]·4H2O (C20H28MnN14O12, Mr = 711.50, tata = 2,4,6-triamino-1,3,5-triazine, pydcH2 = pyridine-2,6-dicarboxylic acid) has been synthesized and its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to the triclinic system, space group P1, with a = 9.9847(3), b = 10.9813(3), c = 15.2616(5) , α = 101.5310(10), β = 90.2610(10), γ = 116.4600(10)°, V = 1459.44(8) 3, Z = 2, Dc = 1.619 g/cm3, μ = 0.539 mm–1, F(000) = 734, the final R = 0.0292 and wR = 0.0745. In the crystal the MnII atom is six-coordinated by four carbonyl oxygen atoms and two pyridine nitrogen atoms from two tridentate pydc ligands to furnish a distorted octahedral geometry. The complex shows the A…D…D’…A’ H-bonded tetramer. The molecules are packed in a three-dimensional framework structure by the combination of O–H…O, N–H…O and N–H…N hydrogen bonds between (tataH)+, [Mn(pydc)2]2– and crystal water.     

A New Complex [Ni（L）2]·2H2O Containing an Interesting Six-membered Water Ring （HL = 2-Iminomethyl-6-methoxy-phenol）

A new complex, [Ni（L）2]·2（H2O） I （HL = 2-iminomethyl-6-methoxyphenol）, has been synthesized and structurally determined. The crystal belongs to the trigonal system, space group R3- with a = 1.9341 （3）, b = 1.9341 （3）, C = 1.2048（2） nm, V = 3.9029（11） nm^3, Mr = 395.05, Z = 9, Dc = 1.513 g·cm^-3, F（000） = 1854,μ= 1.153 mm^-1 and S = 1.014. Each Ni^Ⅱ atom is four-coordinated by two N and two O atoms from two different L anions to give a slightly distorted square-plane geometry. The complex forms a 3-D network structure through N-H...O and O-H...O hydrogen bonds containing an interesting six-membered water ring.     

Synthesis and Crystal Structure of a Palladium（H） Coordination Polymer [Na2Pd（2,6-pydc）2（H2O）6]n

A novel coordination polymer [Na2Pd（2,6-pydc）2（H2O）6]n （2,6-H2pydc = 2,6-pyridinedicarboxylic acid） has been synthesized and its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to the monoclirtic system, space group P21/c, with a = 11.962（2）, b = 6.5552（13）, c = 12.673（3） A, β = 91.72（3）^o, V = 993.3（3） A^3, Z = 2, Mr = 590.68, Dc = 1.975 g/cm^3,μ = 1.059 mm^-1, F（000） = 592, the final R = 0.0211 and wR = 0.0454. In the crystal the Pd（II） ion adopts a distorted four-coordinated square-planar geometry and bonds to two bidentate 2,6-pyridinedicarboxylate molecules through caronyl oxygen and pyridine nitrogen atoms. The title complex exhibits a novel three-dimensional network structure.     

Synthesis, Crystal Structure and Electrochemical Properties of One-dimensional Chain Coordination Polymer [Co（Ⅱ）（C6H5CH=CHCOOH）2（4,4＇-bipy）（H2O）5]n

A one-dimensional chain coordination polymer [Co（Ⅱ）（C6H5CH--CHCOOH）2（4,4＇- bipy）（H20）5]n has been synthesized with cinnamylic acid, 4,4＇-bipy and cobaltous chloride as raw materials. Crystal data for this complex： monoclinic, space group P21/c, a = 1.1481（3）, b = 1.1230（2）, c = 1.1759（3） nm, β = 97.054（4）^o, V= 1.5046（6） nm^3, Mr= 617.50, Dc = 1.363 g/cm^3, Z = 2, ,u（MoKa） = 0.627 mm^-1, F（000） = 646, S = 1.062, R 0.0443 and wR = 0.1178. The crystal structure shows that two neighboring cobalt（ID ions are linked together by one 4,4＇-bipy, and the whole complex molecule adopts a one-dimensional chain structure. Each cobalt（H） ion is coordinated with two nitrogen atoms from two 4,4＇-bipy molecules and four oxygen atoms from four water molecules, giving a distorted octahedral coordination geometry. The electrochemical properties were analyzed by combining with the crystal structure.     

Preparation,Characterization and Crystal Structure Determination of a Nickel Complex [Ni（ftsc）2NOa]NO3 （Hftsc = Furan-2-carbaldehyde Thiosemicarbazone）

A new Ni（II） complex, [Ni（ftsc）2NO3]NO3 （Hftsc = furan-2-carbaldehyde thiosemicarbazone）, has been synthesized and characterized by IR, UV spectra and single-crystal X-ray diffraction analysis. It crystalfizes in a monoclinic system, space group P2 1/n, with a = 10.5203（13）, b = 9.2094（11）, c = 20.829（3）A,β = 91.518（2）°, V= 2 017.3（5）A^3, Z = 4, F（000） = 1064, Dc = 1.716 g/cm^3, and wR = 0.0800. The complex contains a six-coordinated nickel（II） center which is bound to two imine nitrogen atoms and two thiolato sulfur atoms of two ligands as well as two oxygen atoms from a nitrate anion to assume a distorted octahedral coordination geometry. In addition, intermolecular N-H…O and C-H…O hydrogen bonds between adjacent molecules link the molecules together to form a three-dimensional structure.     

Synthesis and Structural Characterization of Manganese Carbonyl Incorporated Polyoxomolybdate （n-Bu4N）2 [Mo6O16（OCH3）2 {HOCH2C（CH2O）3}2 {Mn（CO）3}2]

The polyoxoanion incorporated {Mn（CO）3^＋} complex, （n-Bu4N）2[Mo6O16（OCH3）2{HOCH2C（CH2O）3}2·{Mn（CO）3}2]（1）, has been synthesized by the reaction of （n-Bu4N）4[Mo8O26] with Mn（CO）5Br in methanol, in the presence of C（CH2OH）4. The complex 1 has been characterized by IR, UV-Vis, X-ray single crystal diffraction, and TG. Crystal data for the complex 1：C25H48MnMo3NO16 （1）, Triclinic Pi, a=0.9405（3） nm, b=1.3351（4） nm, c=1.5455（4） nm, α=103.206（5）°, β=102.165（5）°, γ=100.784（5）°, V=1.7896（9） nm^3, Z=2, R1=0.0703, wR2= 0.1495. The structure analysis of complex 1 shows that the complex consists of two tetrabutylammonium cations and a polyoxomolybdate anion that incorporates two fac-Mn（CO）3^＋ units. The anion of complex 1 can be considered as the dimer of two rhomb-like anions by sharing of two comers.     

Antitumor Metallothiosemicarbazonate： Synthesis,Crystal Structure,Spectra and Antitumor Studies of Co（Ⅲ） Complex with Thiosemicarbazone Derivative of 2-Benzoylpyridine

The title complex [Co（L）2]Cl·4H2O I has been achieved via self-assembly by incorporating cobalt into 2-benzoylpyridine thiosemicarbazonate ligand, and characterized by elemental analysis, infrared spectra, mass spectra and single-crystal X-ray diffraction study. The crystal crystallizes in monoclinic, space group P2 1/n, with a = 10.227（3）, b = 17.363（4）, c = 17.459（4） A, β= 100.408（4）°, V= 3049.2（13） A^3, Z = 4, Mr = 677.08, Dc = 1.475 g/cm^3, μ（MoKα） = 0.834 mm^-1, F（000） = 1400, the final R = 0.0747 and wR = 0.0896 for 1663 observed reflections with I 〉 2σ（I）. The complex contains one six-coordinated cobalt ion connected by two thiosemicarbazone ligands which act as a tridentate ligand to coordinate with the center metal atoms via two pyridyl nitrogen atoms, two imine nitrogen atoms and two sulfur atoms giving rise to a mononuclear structure. Hydrogen bonds existing in the complex link the different components to stabilize the crystal structure. The antiturnor activity of the title complex was tested against A549 lung cancer cell line. Complex ! exhibits antitumor activity.     

配位聚合物[Mn（4，4＇-bpy）1．5（H2O）3]（ClO4）·（4，4＇-bpy）（L）·H2O的水热合成和晶体结构

The title compound, [Mn（4,4＇-bpy）1.5（H2O）3]（ClO4）＇（4,4＇-bpy）（L）·H2O（1）, where L=2,4,6-trimethylbenzoic acid, was synthesized and its crystal structure was determined by X-ray diffraction analysis. The crystal is of triclinic, space group P1 with a=2.929 9（6） nm, b=1.0364（2） nm, c=8.2220（1） nm, α=105.300（2）°,β=97.495（2）°,）,=91.118（2）°, V=1.884 0（4） nm^3, Z=2, Mr=780.10, Dc=1.375 g·cm^-3,μ=0.483 mm-1, F（000）=812, R=0.055 4, wR= 0.135 2. The Mn atoms are octahedrally coordinated by three N atoms of three 4,4＇-bipyridine ligands and three O atoms of water. The complex shows a one-dimensional chain structure bridged by water and 4,4＇-bipyridine molecules. CCDC： 615707.     

Synthesis,Crystal Structure and Luminescence Property of [MnL2（bipy）（H2O）2]n

A new one-dimensional Mn（Ⅱ） complex, [MnL2（bipy）（H2O）2]n 1, has been obtained by the reaction of MnCl2·4H2O, 2,2＇-bipyridine （bipy） and 1-（4-phenoxyacetate）-5-thioacetatetetrazole （H2L）. The crystal crystallizes in the triclinic system, space group Pi with a = 7.6088（2）, b = 12.2795（2）, c = 13.6617（3）A, α = 75.416（2）, β =79.264（2）, γ = 74.271（2）°, V = 1179.48（4） A3, Z = 2, Mr = 555.43, F（000） = 570, Dc = 1.564 g/cm^3, μ = 0.704 mm^-1, the final R = 0.0454 and wR = 0.0849 for 3127 observed reflections （Ⅰ〉 2σ（Ⅰ））. The Mn（Ⅱ） is six-coordinated by two water molecules, two N atoms from bipy and two carboxylate O atoms from two L^2- to form a distorted octahedral geometry. Each L^2- ligand serves as a bridging ligand to link two Mn（Ⅱ） atoms, leading to a single-strand zigzag coordination polymer. Hydrogen-bonding interactions between adjacent chains as well as π-π stacking interactions extend the complex into a three-dimensional supramolecular architecture. Moreover, the title compound emits strong red fluorescent light （λem（max） = 610 nm） in EtOH solution.     

Synthesis and Crystal Structure of a 1-D Chain Coordination Complex {[Mn2（HCAM）3（H2bipy）]·5H2O}n

The 1-D chain coordination complex of {[Mn2（HCAM）3（H2bipy）]·5H2O}n （H3CAM = 4-hydroxypyridine-2,6-dicarboxylic acid, bipy = 4,4＇-bipyridine） has been synthesized by the reaction of 4-hydroxypyridine-2,6-dicarboxylic acid, 4,4＇-bipyridine and manganese carbonate under hydrothermal conditions, and its crystal structure was determined by X-ray diffraction method The crystal belongs to the monoclinic system, space group P21/n with a = 10.110（2）, b = 20.159（4）, c = 17.861（4）A,β = 99.67（3）°, V = 3.5884（12） nm3, Mr= 901.47, Z = 4, Dc= 1.669 g.cm^-3, μ= 0.798 mm^-1, F（000） = 1840, the final R = 0.0713 and ωR = 0.1853. The complex forms a 1-D chain bridged by HCAM, protonated 4,4-bipyridines link the 1-D chains to construct 2-D networks via N-H...O hydrogen bonds, and networks are further extended via π-π stacking and hydrogen bonds into 3-D supramolecular framework.     

Macro-, Micro-, Nano- and Crystal Structures of a Homodinuclear Complex [NH3（ CH2）3NH3]2{Na2[（C6H4O2）2]（C6H4O2H）2}

A homodinuclear complex （NH3CH2CH2CH2NH3）2 {Na2[（C6H4O2）2] （C6H4O2H）2} （1） has been synthesized by a solution-based self-assembly route. It crystallized in monoclinic system with space group P21/c. Every sodium ion coordinates in a tetragonal prism fashion with two O atoms of a terminal chelating catecholate ligand and three O atoms from two bridging catecholate ligands. Two neighboring NaO5 tetragonal prisms are edge-shared and centrosymmetric with regard to the inversion center to form a binuclear cluster {Na2[（C6H4O2）2]（C6H4OOH）2}^4- anion. The complex anions were aligned parallelly by n-n interaction and linked with the protonated 1,3-propylenediamine through hydrogen bonds which were assembled into a multi-lamellar structure with channels. The crystal exhibits rectangular geometry with an interior triangle hollow structure under optical microscopy. And the scanning electron microscopy （SEM） indicates that the wall of the tubes shows multi-lamella morphologies. Further, the transmission electron microscopy （TEM） reveals that the crystal is composed of multi-lamellar nano-tubes with diameters less than 100 nm. The molecular structure of the complex was compared with that of its isomer complex 2.     

Hydrothermal Synthesis and Crystal Structure of Complex Mn2（phen）2（p-MBA）4（H2O）

A novel Mn（Ⅱ） complex Mn2（phen）2（p-MBA）4（H2O） has been hydrothermally synthesized by the reaction of p-methyl benzoic acid （p-MBA） with 1,10-phenanthroline （phen）. Crystal data for this complex： monoclinic, space group C2/c, a= 2.3328（3）, b =1.5549（2）, c = 1.5557（2） nm, β = 121.726（2）°, V= 4.7997（11） nm^3, Mr = 1028.85, Dc = 1.424 g/cm^3, Z = 4, F（000） = 2128, μ（MoKa） = 0.590mm^-1, GOOF = 1.060, R = 0.0333 and wR = 0.0767. In the crystal, each Mn（Ⅱ） ion is coordinated by two nitrogen atoms from one o-phenanthroline molecule, three oxygen atoms from three p-methyl benzoic acids and one oxygen atom from one water molecule, giving a six-coordinate distorted octahedral coordination geometry. Two neighboring Mn（Ⅱ） ions are bridged by two p-methyl benzoic acid groups and one water molecule, and their end positions are respectively coordinated by one 1,10-phenanthroline and one p-methyl benzoic acid molecule, giving a binuclear cage structure, of which the Mn（Ⅱ）…Mn（Ⅱ） distance is 0.3502 nm.     

Synthesis,Crystal Structure and Electrochemical Properties of a One-dimensional Chain Coordination Polymer [Mn （NAA ）2（ 4,4′-bipy ） （H2O）4]n

A novel one-dimensional chain coordination polymer [Mn（NAAh（4,4′-bipy）（H2O）4], has been synthesized with a-naphthaleneacetic acid, 4,4′-bipy and manganese（Ⅱ） sulfate as raw materials. Crystal data for this complex： monoclinic, space group P21/c, a = 1.1421（2）, b = 1.6337（3）, c = 0.94177（19） nm, β = 112.15（3）°, V = 1.6275（6） nm^3, De = 1.407 g/cm^3, Z = 2, μ（MoKa） = 0.467 mm^-1, F（000） = 722, S = 1.007, R= 0.0412 and wR = 0.1022. The crystal structure shows that two neighboring manganese（Ⅱ） ions are linked together by one 4,4′-bipy molecule, and the whole complex molecule forms a one-dimensional chain structure. Each manganese（Ⅱ） ion is coordinated with two oxygen atoms of two a-naphthaleneacetic acid molecules, two nitrogen atoms of two 4,4′-bipy molecules and two oxygen atoms from two water molecules, giving a distorted octahedral coordination geometry. The electrochemical properties were also analyzed.     

In Situ Hydrothermal Synthesis of a Mononuclear Copper（Ⅱ） Complex： Cu（H2SIP-O）（bpy）（H2O） （H4SIP-O = 4-Hydroxyl-5-sulfoisophthalic Acid）

The mononuclear complex, Cu（H2SIP-O）（bpy）（H2O） （H4SIP-O = 4-hydroxyl- 5-sulfoisophthalic acid and bpy = 2,2＇-dipyridyl）, has been synthesized by the hydrothermal reaction of Cu（OH）2 with NaH2SIP and bpy at 160 ℃, and characterized by single-crystal X-ray diffraction, elemental analysis and IR spectrum. The new ligand 4-hydroxyl-5-sulfoisophthalic acid derived from 5-sulfoisophthalic acid ligand under an in situ hydrothermal condition. The crystal of the complex crystallizes in a triclinic system, space group P1, with a = 7.757（4）, b = 10.663（6）, c = 11.727（7）A, α = 94.272（4）, β = 104.067（7）, γ = 97.400（7）°, V= 927.4（9）A^3, Z = 2, C18H14N2O9SCu, Mr= 497.93, Dc= 1.783 g/cm^3,μ = 1.350 mm^-1, F（000） = 506, the final R = 0.0518 and wR = 0.1513 for 4180 observed reflections with I 〉 2σ（I）. The central Cu（II） ion is five-coordinated by two oxygen atoms from the H2SIP-O^2- ligand and two nitrogen atoms of bpy ligand in a distorted square-planar geometry as well as a water oxygen atom in the apical position to complete a distorted square-pyramidal coordination geometry. The mononuclear copper molecules are linked by hydrogen bonds between coordinated water molecules and sulfonate groups to form a one-dimensional double-chain structure. The chains are further held together through extensive π-π stacking interactions between the aromatic rings to form a three- dimensional supramolecular structure.     

Synthesis,Characterization and Crystal Structure Determination of a Thiocyanato Bridged One-dimensional Polymeric Complex of Cadmium（Ⅱ）

A new one-dimensional polymeric complex [Cd（SCN）2（H2O）]L （L = N,N′-bis（furan- 2-ylmethylene）hydrazine） has been synthesized and characterized by IR, UV spectra, TG-DTA technique and single-crystal X-ray diffraction analysis. It crystallizes in triclinic, pace group P1^- with a = 5.9268（8）, b = 10.8678（15）, c = 13.3671（19） A, α = 109.295（2）, β = 95.092（2）, γ = 97.8580（10）°, V = 796.70（19）A^3, Z = 2, C12H10CdN4O3S2, Mr = 434.76, μ = 1.648 mm^-1, Dc = 1.812 g/cm^3, F（000） = 428, R = 0.0308 and wR = 0.0769. The crystal structure reveals that the structure of [Cd（SCN）2（H2O）]n features di-μ-1,3-thiocyante bridges and 1D chains. The octahedrally coordinated Cd atom is surrounded by one oxygen atom from water molecule, three S atoms and two N atoms from five di-μ-1,3 thiocyanato bridges. The Cd atoms are connected by two di-μ-1,3 thiocyanato bridges with the Cd（1）…Cd（1A） separation of 4.239（1） A and Cd（1）...Cd（1B） of 5.852（1）/~. In addition, the one-dimensional straight chain structure is further connected by multiform intermolecular N-H…O hydrogen bonds and π-π interactions to form a three-dimensional supramolecular structure.     

Synthesis, Characterization and Crystal Structure of [Ni（S2P{O}OC6H4CH3-p）（dppv）]

O-（p-tolyl）dithiophosphato nickel complex [Ni（S2P{O}OC6HaCH3-p）（dppv）] has been synthesized by the treatment of （dppv）NiCl2 （dppv = Ph2PCH=CHPPh2） with （p-CH3C6HaO）2P{S}SH＇Et2NH in THF. The new complex was fully characterized by elemental analysis, IR, 1H NMR, 31p NMR spectroscopies and thermo-gravimetric analysis. The molecular structure of the complex was established by X-ray crystallography. The crystal crystallizes in monoclinic, space group P21/c with a = 9.2739（5）, b = 17.8803（8）, c = 20.1879（12） A, fl = 93.269（5）, V = 3342.1（3） A3, Z = 4, C33H29NiO2P3S2, Mr = 673.30, Dc = 1.338 g/cm3, F（000） = 1392 and #（MoKa） = 0.877 rnm-l. The final R = 0.0578 and wR = 0.1045 for 4138 observed reflections with 1 〉 20（/） and R = 0.1050 and wR = 0.1204 for all data. The Ni centre atom adopts a NiP2S2 square-planar geometry with two phosphorus atoms from the dppv ligand and two sulfur atoms from the O-（p-tolyl）dithiophosphate ligand. The most interesting structural feature of the title complex resides in its 1D helical chain structure constructing via intermolecular C-H＇＂O secondary interactions along the b-axis. The adjacent helical chains running in opposite directions are connected into a 1D double-stranded helical chain and further linked into a 2D supramolecular network by weak C-H.--C interaction.     

Synthesis and Crystal Structure of a Novel 3D Inorganic-organic Hybrid Metallic Coordination Polymer, [Na2Cd（2,6-pyda）（N3）2（H2O）6]n

A novel coordination polymer [Na2Cd（2,6-pyda）（N3）2（H2O）6]n （2,6-H2pyda = 2,6- pyridinedicarboxylic acid） has been synthesized 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 = 24.416（4）, b = 10.7638（17）, c = 6.9224（11） A^°, β= 106.124（2）A^°, V = 1747.7（5） A^°3, Mr = 515.64, De= 1.960 g/cm^3,μ = 1.365 mm^-1, F（000） = 1024, Z = 4, the final R = 0.0426 and wR = 0.1320. In the title complex, there exist two kinds of metal centers in the structure, cadmium ions and sodium ions. The Cd（Ⅱ） atom shows a distorted pentagonal-dipyramidal geometry defined by two O and one N atoms from one deprotonated pyda ligand and four N atoms from four μ-1,1,3 azido groups. The adjacent cadmium atoms are bridged via two μ-1,1,3 azido groups, along the c axis to afford an extended chain. There is also a 2D network which is comprised of binuclear subunits [NaE（H2O）6] connected by O atoms from coordinated water between the adjacent Cdn（pyda）n（Na）2n infinite chains. Furthermore, each cadmium atom is connected with four adjacent sodium atoms through the bridging N3- ligand in μ-1,3 patterns. Thus, the title complex exhibits a novel three-dimensional network structure.     

Synthesis and Structure Characterization of a Manganese（II） Complex With Eight Coordination Geometry： [Mn（OeCMe）e（phen）2]

The title compound [Mn（O2CMe）2（phen）2] （phen = 1,10-phenanthroline） 1 has been synthesized and structurally determined by single-crystal X-ray diffraction. The crystal is of orthor- hombic, space group Pbcn, with a = 12.554（4）, b = 10.168（3）, c = 17.704（5）A, V= 2259.7（12）A^3 Z = 4, C28H22MnN4O4, Mr= 533.44, Dc= 1.568 g]cm^3, F（000） = 1100, Rint = 0.0242, T= 293（2） K and p = 0.631 mm^-1. The final R = 0.0687 and wR = 0.1960 for 2046 observed reflections with I 〉 20（/）. The structure of the complex consists of one Mn（II） core coordinated by two bidentate-bound CH3COO^- groups and two η^2-phen groups forming an eight-coordinate geometrical configuration.     

Synthesis and Crystal Structure of a One-dimensional Silver（I） Coordination Polymer with 4,4＇-Bipyridine

The title compound, { [Ag2（bipy）2（H2O）2]·pydc·2H2O}n （bipy = 4,4＇-bipyridine, pydc = pyridine-3,5-dicarboxylate）, has been synthesized by the reaction of Ag2O with pydc and bipy in CH3OH solution. It crystallizes in the monoclinic system, space group C2/c with a = 21.419（8）, b = 7.515（3）, c = 18.070（7） A,β = 108.273（6）°, Mr = 765.27, V = 2761.9（17） A^3, Z = 4, Dc = 1.840 g/cm^3, F（000） = 1528,μ = 1.478 mm^-1, the final R = 0.0307 and wR = 0.0681. The structure determined demonstrated that the Ag（I） is three-coordinated by two nitrogen atoms from bipy and one water molecule, forming a one-dimensional coordination polymer [Ag2（bipy）2（H2O）2]n^2n＋, which is further linked to generate a two-dimensional layer structure via Ag---Ag attractions.