Synthesis and Crystal Structure of a Coordination Polymer [Zn（p-pdoa）（bbp）]n with a One-dimensional Helical Chain

The coordination polymer [Zn（p-pdoa）4（bbp）]n 1 （p-pdoa = p-phenylenedioxydiacetate dianion and bbp = 2,6-bis（benzimidazol-2-yl）pyridine） has been synthesized by hydrothermal method and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The title complex crystallizes in the triclinic system, space group P1^- with a = 7.8383（2）, b = 12.6610（4）, c = 13.1792（5）A, a = 84.433（2）,β = 74.2980（1）, γ = 87.4290（1）°, V = 1252.93（7）A^3, Z = 2, Dc = 1.593 g/cm^3,/z = 1.038 mm^-1, F（000） = 616, the final R = 0.0361 and wR = 0.1139. The Zn（Ⅱ） atom assumes a distorted trigonal bipyramidal geometry, involving two carboxyl O atoms from two different p-pdoa ligands and three N atoms from the bbp ligand. The Zn（Ⅱ） atom is alternately interlinked by p-pdoa ligands in a bismonodentate mode into a helical chain with a long pitch of 12.661 A and the adjacent Zn…Zn distance of 11.056 and 12.245 A. There exists a 2D supramolecular framework linked by π-π stacking （3.312 A） between adjacent benzimidazoles of bbp ligands and intermolecular hydrogen-bonding interactions between the uncoordinated carboxylate oxygen atoms （O（2）, 0（5）） and the uncoordinated imidazolyl N atoms （N…O distances 2.706 and 2.786 A）. There also exist two interlayer π-π stacking interactions of 3.299 A between adjacent central pyridines of bbp ligand and 3.176 A between the phenyl groups of p-pdoa ligand. Such π-π stacking interactions extend the two-dimensional layers into a 3D supramolecular network.     

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.     

Synthesis, Crystal Structure and Characterization of a New Mononuclear Zn（Ⅱ） Complex from Schiff-base Ligand

A new mononuclear [Zn（H-1L）2] （L = 1H-indole-3-ethylene-salicylaldimine） was synthesized through the reaction of Zn（Ac）2, salicylaldehyde and tryptamine in hot ethanol solution and characterized by X-ray crystal structure analysis. The crystal belongs to monoclinic, space group P21/n with a = 15.014（2）, b = 10.857（1）, c = 17.489（1）A,β = 95.49（1）°, V = 2837.8（5） A^3, Z = 4, Dc = 1.386 g/cm^3, μ = 0.904 mm-1, F（000） = 1232, the final R = 0.0463 and wR = 0.0890 for 4990 independent reflections. In the complex, the Zn2＋ ion presents a distorted N2O2 tetrahedral coordination involving two H-1L ligands.     

Synthesis and Structure of a Zinc(Ⅱ)Complex:[Zn(Pybta)·Cl2]n

The title compound, [Zn(Pybta)Cl2]n (Pybta = 1-(2-pyridylmethyl)benzontriazole), has a zigzag chain structure. It crystallizes in the monoclinic system, space group P21/c with a = 9.0103(11), b = 17.0276(18), c = 9.2288(11) A, β = 101.309(6)°, Mr= 346.51, V= 1388.4(3) (A)3, Z= 4, Dc= 1.658 g/cm3, F(000) = 696, μ = 2.143 mm-1, the final R = 0.0492 and wR = 0.1236 for 2545 observed reflections with Ⅰ 2σ(Ⅰ). The Zn atom is four-coordinated by two N and two Cl atoms, forming a slightly distorted tetrahedral geometry. Each zigzag chain links its adjacent symmetry-related equivalents via multiple π-π interactions, which are not frequently observed in the previously reported architectures.     

Hydrothermal Synthesis and Crystal Structure of a Zinc（Ⅱ） Polymer with a Two-dimensional Layer Structure： [Zn（pzdc）（phen）]n·nH2O

A metal-organic coordination compound formulated as [Zn（pzdc）（phen）]n·nH2O 1 （H2pzdc = pyrazine-2,3-dicarboxylic acid, phen = 1,10-phenanthroline） has been hydrothermally synthesized and structurally characterized by elemental analysis, IR, fluorescence spectrum and single-crystal X-ray diffraction. The title compound crystallizes in the monoclinic system, space group P21/n with a = 11.607（2）, b = 11.719（2）, c = 13.140（3）A^°, β = 110.707（3）°, V= 1671.9（6）A^°3, C18H12ZnN4O5, Mr= 429.69, De = 1.707 g/cm^3,μ（MoKa） = 1.511 mm^-1, F（000） = 872, Z = 4, the final R = 0.0356 and wR = 0.0853 for 2713 observed reflections （I 〉 2σ（I））. It exhibits an interesting two-dimensional layer structure and shows yellow photoluminescent property at room temperature.     

Hydrothermal Synthesis, Crystal Structure and Electrochemical Properties of Complex Zn（phen）（m-CBA）2（H2O）

A novel complex Zn(phen)(m-CBA)2(H2O) with m-chlorobenzoic acid (m-CBA), 1,10-phenanthroline (phen) and zinc chloride has been hydrothermally synthesized and characterized. Crystal data for this complex: triclinic, space group P1, a = 0.8361(5), b = 1.2455(7), c = 1.3107(7) nm, α = 115.637(8), β = 91.014(9), γ = 104.857(8)o, V = 1.1763(11) nm3, Dc = 1.623 g/cm3, Z = 2, F(000) = 584, GOOF = 1.078, the final R = 0.0453 and wR = 0.1192. Structure analysis shows that the zinc ion coordinates with two nitrogen atoms of one 1,10-phenanthroline molecule, three oxygen atoms from two m-chlorobenzoic acid molecules and one water molecule, giving a distorted square-pyramidal coordination geometry. The cyclic voltametric behavior of the complex was also investigated.     

Synthesis and Crystal Structure of the Complex [Zn（DBSHSH）（py）2]

1 INTRODUCTION Salicylaldehyde salicyloylhydrazone (SHSH) and their deviatives show moderate fungicidal and anti- bacterial activities[1]. Rao has reported some novel lanthanoid complexes of salicylaldehydrazone. Va- rious polyhedral geometries such as distorted octa- hedron, pentagonal bipyramid and distorted square antiprism were tentatively proposed for the com- plexes used as excellent semi-conducting materials[2]. Tang has studied spectrofluorimetric determination of hydrogen perox…     

Synthesis and Crystal Structure of the Copper（Ⅱ） Complex [Cu2Cl2（HEMDP）2]·THF

One dinuclear complex [Cu2Cl2(HEMDP) 2]·THF 1(H2EMDP = 2-[(2-hydroxyethylimino)-methyl]-4,6-diiodo-phenol,THF = tetrahydrofuran) has been designed and synthesized by H2EMDP with CuCl2·2H2O in THF solvent. Complex 1 was characterized by UV,IR,ESI-MS,and elemental analyses. 1 was characterized by X-ray crystallography. The crystal belongs to the monoclinic system,space group C2/c with a = 27.886(3) ,b = 8.6890(12) ,c = 26.698(2) ,β = 105.521(2) o,V = 6233.1(12) 3,Z = 8,Mr = 1102.01,μ = 5.533 mm-1,Dc = 2.349 Mg/m3,F(000) = 4112,the final R = 0.0486 and wR = 0.1175(I > 2σ(I)) . In addition,further investigation revealed that the central copper(Ⅱ) atom in the complex is five-coordinated by one nitrogen atom and two oxygen atoms from H2EMDP and two chlorine atoms from chlorid. The 3,5-diiodosalicylaldehyde Schiff base acts as a tridentate ligand. H2EMDP and 1 were assayed for antibacterial(B. subtilis,S. aureus,S. faecalis,P. aeruginosa,E. coli and E. cloacae) activities by MTT(3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl trtrazolium bromide) method. 1 showed the most favorable antimicrobial activity with MICs of 3.125,6.25,6.25,12.5,3.125 and 6.25 μg/mL against B. subtilis,S. aureus,S. faecalis,P. aeruginosa,E. coli and E.cloacae,respectively.     

Synthesis and Crystal Structure of [Mn（DPMT）2Cl2（H2O）2]

The title compound [Mn(DPMT)2Cl2(H2O)2] (DPMT = 1-[[2-(2,4-dichlorophenyl)- 1,3-dioxolan-2-yl]methyl]-1H-1,2,4-triazole) was synthesized by the reaction of MnCl2·4H2O and DPMT in ethanol solution and its structure was determined by single-crystal X-ray diffraction. The crystal belongs to monoclinic, space group P21/c with a = 23.913(4), b = 7.8883(13), c = 8.6291(14) , β = 95.816(3)o, V = 1619.4(5) 3, Z = 2, C24H26Cl6MnN6O6, Mr = 762.15, Dc = 1.563 g/cm3, μ = 0.950 mm-1, S = 1.045, F(000) = 774, R = 0.0462 and wR = 0.0981. The molecular structure is a centrosymmetric conformation, and two ligands are symmetrically located on both sides of the Mn atom. The manganese atom is surrounded by two nitrogen atoms from ligands, two chlorine atoms and two oxygen atoms from water molecules to form a slightly distorted octahedral geometry.     

Synthesis and Crystal Structure of Zn（Ⅱ） Complex with 2-Aminopyridine and Acetylacetone

1 INTRODUCTION As one kind of compound with extensive phy- siological and pharmacology activities[1], 2-amino- pyridine is easy to form complexes, and some of which may catalyse hydrolysis of ester[2]. Acetyl- acetone is an useful intermediate in the synthesis of sulfanilamide, additive and catalyst[3]. Complexes containing acetylacetone take on excellent lumines- cent properties[4]. To be an active center of some sig- nificant enzymes[5, 6], zinc takes the form of its su- pramolecular co…     

Syntheses and Crystal Structures of Two Novel 1-D Metal Complexes with Dicyanamide： [Zn（pheen）（dca）2]n and [Cu（quin）2（dca）2]n

1 INTRODUCTION Polymeric transition metal complexes with di-cyanamide have attracted considerable attention because of their interesting coordination and phy-sical properties in recent years[1]. The dicyanamide is a versatile ligand coordinated to metal…     

Synthesis and Crystal Structure of a 1-D Coordination Polymer [Pb（ANS）2（phen）]n

A new one-dimensional coordination polymer, [Pb(phen)(ANS)2]n (ANS = 2-ami- nonaphthalene-1-sulfonate, phen = 1,10-phenanthroline), has been prepared by hydrothermal synthesis and structurally characterized by elemental analysis, IR and single-crystal X-ray diffrac- tion. The results determined by XRD reveal that the complex crystallizes in monoclinic, space group P21/c with a = 16.8374(14), b = 16.9825(14), c = 9.9392 (8) , β = 95.9830(10)o, V = 2826.5(4) 3, Mr = 831.86, Dc = 1.955 g/cm3, μ(MoKα) = 6.173 mm-1, F(000) = 1624, Z = 4, the final R = 0.0272 and wR = 0.0694 for 4305 observed reflections (I > 2σ(I)). In the complex, the adjacent lead(II) ions are bridged through the oxygen atoms of sulfonate groups in a syn-syn conformation, yielding an infinite zigzag chain. And the intermolecular N–H···O hydrogen bonds link the chains into two-dimensional layered networks, which are further assembled into a separate two-layer-film-like packing structure.     

Synthesis and Crystal Structure of a Novel Binuclear Copper（Ⅱ） Complex, [Cu（paba）Cl]

A novel binuclear Cu（Ⅱ） complex [Cu（paba）Cl] （pabaH = 2-（2-pyridylmethylimine）benzenesulfonic acid） has been synthesized and characterized by elemental analysis, IR and single-crystal X-ray diffraction. The crystal of the title complex crystallizes in a monoclinic system, space group P21/n, with a = 6.8165（7）, b = 15.3073（16）, c = 12.3795（13） A^°, β= 95.0160（10）°, V= 1286.8（2） A^°^3, Mr = 360.26, Dc= 1.860 g/cm^3,μ = 2.074 mm^-1, F（000） = 724, Z = 4, the final R = 0.0252 and wR = 0.0675 for 2395 observed reflections with I 〉 20（I）. The title complex is centrosymmetric and a pair of chlorides act as μ2-bridges to link two Cu（Ⅱ） ions forming a binuclear complex. Every Cu（Ⅱ） ion is five-coordinated by pyridyl N, imine N and sulfonate O atoms of the tridentate paba ligand as well as two bridging Cl^-, constructing the distorted square-pyramidal geometry. In the structure extensive hydrogen bonds and weak π-π stacking stabilize the solid structures, through which the complex builds its 3-dimensional supramolecular structure.     

Synthesis, Structure and Topological Analysis of a New Zinc（Ⅱ） Complex [Zn2（bptc）（bpe）（H2O）]n

A novel zinc coordination polymer,[Zn 2 (bptc)(bpe)(H 2 O)] n (1,H 4 bptc=3,3,4,4-benzophenonetetracarboxylate,bpe=1,2-bis(4-pyridyl) ethane),has been prepared under hydrother-mal conditions.The crystal structure is of monoclinic,space group C/2c with a=27.50(2),b=6.207(4),c=16.233(11),β=107.522(14)°,V=2642 (3)3,C 29 H 22 N 2 O 11 Zn 2,M r=705.27,Z=4,D c=1.773 g/cm 3,F(000)=1432,μ=1.887 mm-1,R=0.0421 and wR=0.1049 for 2594 observed reflections (I > 2σ(I)).X-ray single-crystal diffraction analysis shows that 1 features two-dimensional [Zn 2 (bptc)(H 2 O)] layers,which are further linked by the bpe ligands to give rise to a three-dimensional pillar-layered structure.According to the topology analysis,this framework can be simplified into a (4,6)-connected (4 4 ·6 2)(4 4 ·6 10 ·8) network.     

Synthesis,Crystal Structure and Luminescent Property of [Zn（C12H9O3）2（C10H8N2）]n·nH2O

Under hydrothermal condition, the reaction of 2-naphthoxyacetic acid with ZnCl2 and 4,4′-bipyridine （4,4′-bipy） has afforded a new Zn（Ⅱ） compound, [Zn（C12H9O3）2（C10H8N2）]n·nH2O1, which was structurally characterized by single-crystal X-ray diffraction analysis. The crystal is of monoclinic, space group P21/c with a = 7.7335（2）, b = 19.3834（4）, c = 20.1707（4） A, β = 104.9830（10）°, V = 2920.82（11） A^3, C34H28ZnN2O7, Mr = 641.95, Z = 4, Dc = 1.460 g/cm^3,μ = 0.895 mm^-1, F（000） = 1328, R = 0.0406 and wR = 0.0876 for 4417 observed reflections （I〉 2σ（I）） Complex 1 consists of one-dimensional zigzag chains deriving from Zn（C12H9O3）2 units linked by 4,4′-bipy ligands, and lattice water molecules decorate between the chains. Non-covalent interactions, such as hydrogen-bonding and aromatic π-π interactions, lead to the formation of a 3D network structure. The thermogravimetric analysis （TGA） and luminescent property for 1 have also been studied in this paper.     

Hydrothermal Synthesis and Crystal Structure of Zinc（Ⅱ）Dinicotinate Complex [Zn （nic）2（H2O）4] （nic=nicotinic acid） ： A Three-dimensional Hydrogen-bond Network

Nicotinic acid and its transition-metal comple-xes have become increasingly important due to theirpotential applications as cosmetics or medicineswith antitumor, antibacterial and antifungal activi-ties, and the activity in the maintenance of normalglucose metabolism, etc. A major research ef-     

Synthesis and Crystal Structure of a 1D Alternate Chain Polymer [Zn2（NBA）2（4,4′-bipy）]n

A one-dimensional zinc-containing coordination polymer, [Zn2（NBA）2（4,4′-bipy）]n （NBA = 3-nitrobenzoic acid, 4,4′-bipy = 4,4′-bipyrindine）, has been solvothermally synthesized and characterized by single-crystal X-ray diffraction, IR and elemental analysis. The crystal structure is of monoclinic, space group C2/c with a = 24.6478（2）, b = 14.0964（3）, c = 11.4275（2）A, β=108.7870（10）°, V = 3758.89（11） ,A^3, C38H20N6O16Zn2, Mr = 947.34, Z = 4, De = 1.674 g/cm^3 μ= 1.363 mml, F（000） = 1912, R = 0.0720 and wR = 0.2277 for 2841 observed reflections （I 〉 2σ（I）. In this compound, NBA in syn-syn coordination mode bridges zinc centers into dimericzinctetracarboxylate [Zn2（COO）4] secondary building units （SBUs） which are linked through μ-4,4′-bpy affording 1D alternating chains. These adjacent chains are further stacked through intermolecular π...π interactions to form a 3D framework.