Syntheses and Structures of Two New Cobalt Supramolecular Complexes, [Co(4,4'-bipy)_2(H_2O)_4]· [Co_2(4,4'-bipy)3O(H_2O)_8]·2TST·2(4,4'-bipy)·4H_2 and [Co(4,4'-bipy)_2(H_2O)_4]DSNT'4,4'-bipy

Two new cobalt(Ⅱ) supramolecular complexes [Co(4,4'-bipy)_2(H_2O) _4]·[Co_2(4,4'-bipy)3-(H_2O) _8]·2TST-2(4,4'-bipy)·4H_2O 1 and [Co(4,4'-bipy) _2(H_2O) _4]DSNT·4,4'-bipy 2 based upon the assembly of Co(Ⅱ), 4,4'-bipyridine (4,4'-bipy) and two new multifunctional organic ligands, 2,4,6-tris(4-sulfophenyl-amino)-1,3,5-triazine (H_3TST) and 2,4-bis(p-sulfanilato)-6-diethylamino-1,3,5-triazine (H_2DSNT), have been prepared by hydrothermal method and characterized by elemental analysis, IR spectrum, and single-crystal X-ray diffraction. The crystal structure of 1 is of monoclinic, space group P2_(1/n) with α= 13.599(4), b = 18.988(6), c = 22.995(7) A, β = 90.273(6)°, V= 5938(3) A~3, Z = 4, C_(56)H_(59)CO_(1.5)N_(13)O_(17)S_3, M_r = 1370.74, D_c = 1.533 g/cm~3,μ = 0.613 mm~(-1), F(000) = 2842, GOOF = 1.018, the final R = 0.0796 and wR = 0.1498 for 9019 observed reflections with I > 2o(I). The crystal structure of 2 belongs to the monoclinic system, space group C2/c with α = 18.864(6), b = 14.283(5), c = 20.246(7) A, β = 107.799(6)°, V = 5194(3) A~3, Z = 4, C_(49)H_(52)CoN_(12)O_(10)S_2, M_r = 1092.08, D_c = 1.397 g/cm~3, μ= 0.480 mm~(-1), F(000) = 2276, GOOF = 1.059, the final R = 0.0665 and wR = 0.1900 for 4887 observed reflections with I> 2σ(I). The results of X-ray crystal structure analysis revealed that complexes 1 and 2 exhibit layered supramolecular frameworks stabilized by electrostatic interactions, π-π interactions and hydrogen bonds.     

Hydrothermal Synthesis and Crystal Structure of a New Manganese(Ⅱ) Complex with 2,4-Pyridine-dicarboxylic Acid and 2,2'-Bipyridine Ligands

A new metal-organic complex [Mn_2(PDC)_2(bipy)_2(H_2O)_2] (H_2PDC=2,4-pyridinedicarboxylic acid,bipy=2,2'-bipyridine) 1 has been hydrothermally synthesized and structurally characterized by elemental analysis,IR spectrum,TG and single-crystal X-ray diffraction. The compound crystallizes in triclinic,space group P~(-)1 with α=7.376(3),b=9.990(4),c=11.950(5)(A),α=75.217(5),β=78.052(5),γ=70.655(5)°,V=796.0(5)(A)~3,C_(34)H_(26)Mn_2N_(6O)O_(10),M_r=788.49,D_c= 1.645 g/cm~3,μ(MoKa) = 0.866 mm~(-1),F(000)=235,Z=1,the final R=0.0425 and wR=0.0700 for 1971 observed reflections (Ⅰ > 2σ(Ⅰ)). In the crystal structure,the manganese atom is six-coordinated by two carboxylate oxygen atoms from two different PDC ligands,one aqua ligand,and three nitrogen atoms from 2,2'-bipy and PDC ligands,giving a distorted octahedral geometry. It exhibits a three-dimensional supramolecular network defined by O-H…O hydrogen-bonding interactions.     

Synthesis and Characterization of Nickel(II) and Copper(II) Complexes with Schiff Base (1R,2R)-(-)-Diaminocyclohexane-N,N'-bis(3-tert-butyl-5-(4'-benzoic acid)-salicylidene)

Two homochiral metallosalen complexes, Ni(salen) (salen = (1R,2R)-(-)-diaminocyclohexane-N,N'-bis(3-tert-butyl-5-(4'-benzoic acid)-salicylidene) 1 and Cu(salen) 2, have been synthesized and characterized by IR, microanalysis, TGA, powder and single-crystal X-ray crystallography. Both 1 and 2 crystallize in orthorhombic space group P21212 with Z = 4. For 1, a = 12.082(2), b = 15.447(3), c = 18.784(4) , V = 3505.7(12) 3, Mr = 731.50, Dc = 1.386 g/cm3, μ = 0.606 mm–1, F(000) = 1544, the final GOOF = 1.043, R = 0.0496 and wR = 0.1248 for 4791 observed reflections with I > 2σ(I). For 2, a = 12.181(2), b = 15.501(3), c = 18.877(4) , V = 3564.3(12) 3, Mr = 736.33, Dc = 1.372 g/cm3, μ = 0.665 mm–1, F(000) = 1548, the final GOOF = 1.062, R = 0.0575 and wR = 0.1508 for 4562 observed reflections with I > 2σ(I). The crystal structures of 1 and 2 are isostructural with very similar supramolecular structures. An infinite two-dimensional network is generated by hydrogen bonding interactions and intermolecular π···π interactions.     

Crystal Structure and Inhibitory Activity against Xanthine Oxidase of Bis(μ2-chloro)-chloro-(μ-N,N'-(2-pyridylmethylene)Furanmethanoamine Copper(Ⅱ)Complex

A chloro-bridged dinuclear copper(Ⅱ) complex with ligand 2-pyridylme-thylene-furfurylamine has been synthesized and characterized by single-crystal X-ray diffraction,and its inhibitory activity on xanthine oxidase(XO)Was also evaluated.It crystallizes in the triclinic system,space group P-1 with a=8.0441(16),b=8.5663(17),c=10.060(2)(A),α=77.52(3),β=72.04(3),γ=70.12(3)°,V=615.3(2)(A)3,Z=1,Dc=1.731 g/cm3,F(000)=322,the final R=0.0401 and wR=0.0934 for 1971 observed reflections with Ⅰ＞2σ(Ⅰ).X-ray analysis reveals that the Cu(Ⅱ)cation is five-coordinated by two N atoms of Schiff base and three C1 anions.The C-H…Cl intermolecular and intramolecular hydrogen bonds connect the molecules to form a three-dimensional network.Tilis copper(Ⅱ) complex shows more potent inhibitory activity against XO with Ⅰ C50=3.48/μM than the standard inhibitor allopurinol.     

Synthesis and Crystal Structure of a Manganese(Ⅱ) Complex with 2-(4'-Chlorine-benzoyl)-benzoic Acid and 1,10-Phenanthroline

A new metal-organic complex Mn2(cbba)4(phen)2 (Hcbba = 2-(4'-chlorine-benzoyl)-benzoic acid, phen = 1,10-phenanthroline) 1 has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analyses and IR spectroscopy. The compound crystallizes in orthorhombic, space group Pbcn with a = 12.154(5), b = 18.166(7), c =31.197(13) (A°), V = 6887(5) (A°)3, C80H48C14Mn2N4O12, Mr= 1508.90, Dc = 1.455 g/cm3, μ(MoKa) =0.591 mm-1, F(000) = 3080, Z = 4, the final R = 0.0408 and wR = 0.0873 for 4033 observed reflections (I > 2σ(I)). In the crystal structure, the manganese atom is six-coordinated with four carboxylate oxygen atoms from three different cbba ligands and two nitrogen atoms from phen ligands, showing a distorted octahedral geometry. Furthermore, it exhibits a 3D supramolecular network through π-π interactions.     

Synthesis, Crystal Structure and Electrochemistry Properties of a (N,N'-Ethylene-bis(salicylaldiminato)) Nickel(Ⅱ) Complex, [Ni2(salen)2]·NCS-NH4

A new Ni(Ⅱ) complex [Ni2(salen)2]·(NCS)·NH4 (salen = N,N'-bis(salicylidenea-mino)ethanato) has been prepared and structurally characterized by elemental analysis, IR spectra and single crystal X-ray diffraction. It crystallizes in the orthorhombic system, space group Pbca with a = 16.8725(13), b = 19.0046(15), c = 20.0583(16) (A), Z = 8, V = 6431.8(9) (A)3, C33H32N6Ni2O4S1, Mr= 726.13, Dc = 1.500 g/cm3, F(000) = 3008, μ = 1.284 mm-1, the final R = 0.0394 and wR = 0.0767 for 4449 observed reflections with Ⅰ＞2σ(Ⅰ). The complex involves a N,N'-ethylene-bis(salicylaldiminato) Schiff base, an isothiocyanato anion and an ammonium cation. The nickle(Ⅱ) ion adopts a distorted square coordination geometry with N2O2 set of Schiff base ligand. The complexes are linked into a dimmer via intermolecular hydrogen bonds and the [Ni(salen)] moieties are connected together to form a 2-D layer structure by intermolecular N-H…O hydrogen bonds and π-π stacking. Cyclic-voltammetry method was used to characterize electrochemically the complex.     

Hydrothermal Synthesis, Structure and Photoluminescence of a 2D Lead(Ⅱ) Coordination Polymer with (4,3 6) Topology Based on Pb and 1,2,3,4-Butanetetracarboxylate Nodes

A lead(Ⅱ) coordination polymer, {[Pb2(butca)(H2O)2](H2O)2}n (1), has been synthesized by the hydrothermal reaction of Pb(OH)2 and 1, 2, 3, 4-butanetetracarboxylic acid (H4butca) at 160 ℃. Single-crystal X-ray analyses reveal that it crystallizes in monoclinic, space group P21/c with a = 7.616(5), b = 7.584(4), c = 12.314(7) (A), β = 105.595(12)°, V = 685.0(7) (A)3, Z = 4,C8H14O12Pb2, Mr= 716.57, Dc=3.474 g/cm3,μ = 24.610 mm-1, F(000) = 644, the final R = 0.0381 and wR = 0.1176 for 1465 observed reflections with Ⅰ＞ 2σ(Ⅰ). The complex presents a 2D-layered structure featuring two different types of rings, and has a (4,3 6) topology based on Pb and butca 4- nodes. In solid state, complex 1 shows photoluminescence with the maximum emission intensity at 468 nm under 286 nm excitation.     

Two Coordination Polymers Containing Linear Co(Ⅱ)-Trinuclear and Cu(Ⅱ)-Chain Assembled from 4-Fluorocinnamic Acid and N-Donor Ligand

Two new coordination polymers,named {[Co_3(pfca)_6(phen)_2]·2H_2O}_n(1) and[Cu(pfca)_2(4,4'-bpy)(H_2O)]_n(2)(Hpfca = 4-fluorocinnamic acid and 4,4-bpy = 4,4-bipyridine),were hydrothermally synthesized and characterized by elemental analysis,IR spectroscopy,thermogravimetric analysis(TGA),and single-crystal X-ray diffraction.Complex 1 crystallizes in the triclinic crystal system,space group P_1 with a = 10.939(3),b = 12.430(4),c = 13.815(4) A,α=78.436(3),β= 70.261(3),γ= 80.268(3)°,V= 1721.8(9) A~3,D_c = 1.508 g/cm~3,M_r= 1564.06,Z = 1,F(000) = 799,μ= 0.802 mm~(-1),the final R = 0.0432 and wR = 0.1015 for 13250 observed reflections with I 2σ(I).Complex 2 is of monoclinic system,space group P2\lc with a =15.4985(14),b = 15.8424(14),c = 10.9528(10) A,β= 107.1600(10)°,V= 2569.6(4) A~3,D_c = 1.468g/cm~3,M_r = 568.02,Z = 4,F(000) = 1164,μ= 0.906 mm~(-1),the final R = 0.0371 and wR = 0.0842 for 18183 observed reflections with I 2σ(I).Complex 1 features linear Co(Ⅱ)-trinuclear units,which are assembled into a final 3D supramolecular structure through π…π stacking interactions and F-H weak interactions.Complex 2 consists of 1D polymeric Cu(Ⅱ)-chains that are further cohered together by extensive H-bonds.     

A New One-dimensional Dicyanamide Bridged Zinc(Ⅱ) Complex Containing Nitronyl Nitroxide Radicals: Synthesis,Crystal Structure and Magnetic Properties

A new one-dimensional dicyanamide bridged zinc(Ⅱ) complex containing nitronyl nitroxide radicals [Zn(NO3)(NIT-1'-MeBzim)(dca)]n·(H2O)n (NIT-1'-MeBzIm = 2-{2'-[(1'-me-thyl)benzimidazolyl]}-4,4,5,5-tetramethylimidazoine-1-oxyl-3-oxide, dca = dicyanamide anion) has been prepared and structurally characterized by single-crystal X-ray diffraction. The complex crystallizes in trielinic, space group P1, with a = 7,428(3), b = 9.839(3), c = 16.708(6) A, а = 93.270(4), β= 101.642(4),γ= 100.632(4)°, C17.5H21N8O5.5Zn, Mr = 496.79, V= 1169.7(7) A3, Dc = 1.411 g/cm3,μ(MoKa) = 1.096 mm-1, Z = 2, F(000) = 512, R = 0.0583 and wR = 0.1663 for 4295 observed reflections with I > 2σ(I). X-ray analysis reveals that the zinc(Ⅱ) ion is six-coordinated with a distorted oetahedral geometry. These units develop as 1D species where dieyanamide ligands bridge zine(Ⅱ) ions. In addition, molecules are linked by π-π piling interactions to form 1-D double-chains. Magnetic investigation indicates that the weak intramoleeular interactions are antiferromagnetic with J = -0.27 cm-1, where the spin Hamitonian is defined as H = -2 ∑ijJijSiS within the complex.     

Hydrothermal Synthesis, Crystal Structure and Magnetic Property of a Novel Pentanuclear Copper(Ⅱ) Complex: [Cu5(SIP)2(HSIP)2(H2O)18](H2O)5

The pentanuclear complex, [Cu5(SIP)2(HSIP)2(H2O)18](H2O)5 (H3SIP=5-sulfoi-sophthalic acid), has been synthesized by the hydrothermal reaction of CuCl2 with NaH2SIP at 160 ℃, and characterized by single-crystal X-ray diffraction and IR spectrum. The crystal of the complex crystallizes in a trielinic system, space group P1, 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) A3, Z = 1, C32H60O51S4Cu5, Mr= 1706.74, Dc= 1.825 g/cm3,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 Cu2+ ions are connected by two symmetry-related tridentate SIP3- ligands and charge-balanced by two monodentate HSIP2- 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 Cu2+ ions.     

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

A new complex [Zn(NIT-1'-MeBzIm)Cl2(H2O)] (NIT-1'-MeBzIm = 2-{2'-[(1'-methyl)benzimidazolyl]}-4,4,5,5-tetramethylimidazoline-l-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) A3, Dc = 1.528 g/cm3, 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.     

Syntheses and Crystal Structures of Two One-dimensional Cobalt(Ⅱ) Compounds with the Flexible Dipyridyl Ligan

Two one-dimensional cobalt(Ⅱ) compounds {[Co(Hbpma)(H2O)4 ] 2 ·3SO 4 ·4.5H2O} n1 and {[Co(Hbpma)(NCS) 3 (H2O)]·2.85H2O}n2 (bpma = N,N -bis(3-pyridylmethyl)amine) have been synthesized and structurally characterized by single-crystal X-ray diffraction. Complex 1 crystallizes in triclinic, space group P1 with a = 15.8780(5), b = 16.2187(5), c = 16.4858(5) , α = 91.0420(10), β = 94.5190(10), γ = 101.4360(10)°, V = 4145.7(2) 3 , C 24 H 53 Co 2 N 6 O 24.50 S 3 , M r = 1031.76, Z = 4, D c = 1.653 g/cm 3 , μ(MoKα) = 1.046 mm -1 , F(000) = 2148, S = 1.017, the final R = 0.0269 and wR = 0.0644 for 13032 observed reflections (I > 2σ(I)). For complex 2, it belongs to triclinic, space group P1 with a = 9.3761(11), b = 10.5814(13), c = 11.2972(14) , α = 85.472(2), β = 88.058(2), γ = 76.203(2)°, V = 1085.0(2) 3 , C 15 H 21.70 CoN 6 O 3.85 S 3 , M r = 502.79, Z = 2, D c = 1.539 g/cm 3 , μ(MoKα) = 1.112 mm -1 , F(000) = 519, S = 1.070, the final R = 0.0358 and wR = 0.0899 for 3466 observed reflections (I > 2σ(I)). Two complexes 1 and 2 are both found to be one-dimensional coordination polymers bridged by the protonated bpma ligands, which are assembled into three-dimensional supramolecular structures through the hydrogen bonding interactions and π-π packing interactions.     

Syntheses and Crystal Structures of Two New Zinc(Ⅱ)Nitroxide Radical Complexes Bridged by Isophthalate

Two novel complexes [Zn(NIT3-py)(ip)]n 1 and [Zn(im3-py)(ip)]n 2 (NIT3-py =2-(3"-pyridyl)-4,4,5,5,-tetramethylimidazoline-1-oxyl-3-oxide, im3-py = 2-(3'-pyridyl)-4,4,5,5-te-tramethylimidazoline-1-oxyl, ip = isophthalate) have been synthesized and structurally determinedby X-ray diffraction.Crystal data for 1: C32H36N6O8Zn, Mr= 698.04, monoclinic, space group C with a = 23.600(3), b = 10.2073(12), c = 13.4027(16)(A), β= 92.586(2)°, V = 3225.3(7) (A)3, Dc=1.438 g/cm3, F(000) = 1456,μ(MoKα) = 0.822 mm-1, Z = 4, the final R = 0.0390 and wR = 0.1032 for 6037 independent reflections with Rint=0.0214.Crystal data for 2: C32H36N6O6Zn, Mr = 666.04,monoclinic, space group C2/c with a = 24.434(4), b = 13.543(2), c = 10.2379(16)(A), β= 109.024(2)°,V= 3202.8(9)(A)3, Dc= 1.381 g/cm3, F(000) = 1392,μ(MoKα) = 0.820 mm-1, Z= 4,the final R = 0.0304 and wR = 0.0658 for 2833 independent reflections with Rint = 0.0307.X-ray analysis reveals that both Zn(Ⅱ) ions are four-coordinated by two pyridyl-N atoms from nitroxide radicals and two carboxylate oxygen atoms to form distorted tetrahedral geometries.Each iso-phthalate dianion binds two Zn(Ⅱ) ions in a monodentate mode, leading to a 1-D chain structure.     

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-1-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 P21/n with a = 10.6798(9), b = 11.2705(9), c = 12.9559(10) , β = 107.3770(10)o, V = 1488.3(2) 3, C13H15ClN3O4, Mr = 312.73, Z = 4, Dc = 1.396 g/cm3, μ(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 55.75o. The compound results in a 1-D zig-zag chain structure by intermolecular H-bond interaction. Compound 2 crystallizes in triclinic, space group P1 with a = 10.3699(10), b = 10.6286(11), c = 15.1683(15), α = 77.5330(10), β = 773080(10), γ = 87.3420(10)o, V = 1592.5(3) 3, C23H17ClF12N3O8Cu, Mr = 790.39, Z = 2, Dc = 1.648 g/cm3, 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.     

Synthesis and Characterization of a Homochrial Manganese（Ⅱ）Complex Constructed from （1R,2R）-（-）-Diaminocyclohexane-N,N biscarboxyl-salicylidene）

A homochrial manganese(Ⅱ) complex derived from chiral salen ligand (1R,2R)-(-)diaminocyclohexane-N,N-biscarboxyl-salicylidene) (1) has been synthesized through solvothermal procedure and characterized by IR,elemental analysis,TGA,circular dichroism (CD),powder and single-crystal X-ray crystallography.It crystallizes in monoclinic,space group C2 with a=32.987(7),b=7.4662(15),c=17.931(4),β=97.82(3)°,V=4375.0(15) 3,Z=8,D c=1.544 g/cm 3,F(000)=2096,M r=508.36,μ=0.658 mm-1,the final GOOF=0.975,R=0.0676 and wR=0.2068 for 6357 observed reflections with I > 2σ(Ⅰ).The coordination polymer 1 possesses a 1D infinite zigzag chain architecture constructed by the dicarboxyl-functionalized metallosalen ligand (MnSalen),and the polymeric chains are further assembled into a 2D supramolecular network structure via strong intermolecular hydrogen bonding interactions between the adjacent zigzag chains.     

Syntheses and Crystal Structures of Two Cadmium(Ⅱ) Compounds Linked by N,N-Bis(3-pyridylmethyl)amine

Two cadmium(Ⅱ) compounds linked by a flexible dipyridyl ligand {[Cd2(Hbpma) Cl5(H2O)]·2H2O}n 1 and [Cd(Hbpma)Cl(H2O)2]2·2SO4·3H2O 2 (bpma = N,N-bis(3-pyridylmethyl)amine) have been synthesized and structurally characterized by single-crystal X-ray diffraction. Complex 1 crystallizes in triclinic, space group P with a = 9.5612(6), b = 11.3401(7), c = 11.5069(12), α = 112.8540(10), β = 106.5330(10), γ = 101.6680(10)°, V = 1030.77(14)3, C12H20Cd2Cl5N3O3, Mr = 656.36, Z = 2, Dc = 2.115 g/cm3, μ(MoKα) = 2.727 mm-1, F(000) = 636, S = 1.059, the final R = 0.0319 and wR = 0.0822 for 3443 observed reflections (I > 2σ(I)). For complex 2, it belongs to triclinic, space group P with a = 10.9487(4), b = 11.4197(4), c = 15.4288(5), α = 94.7470(10), β = 104.1000(10), γ = 104.42°, V = 1790.76(11)3, C24H42Cd2Cl2N6O15S2, Mr = 1014.46, Z = 2, Dc = 1.881 g/cm3, μ(MoKα) = 1.529 mm-1, F(000) = 1020, S = 1.050, the final R = 0.0178 and wR = 0.0451 for 6026 observed reflections (I > 2σ(I)). Complex 1 is found to have tetranuclear Cd(Ⅱ) clusters which are bridged by the protonated bpma ligands leading to one-dimensional coordination polymers, whereas complex 2 consists of binuclear Cd(Ⅱ) structures linked by the protonated bpma ligands. Both complexes are assembled into three-dimensional supramolecular structures through hydrogen bonding interactions.     

Syntheses,Structures, and Photoluminescent Properties of Two 2D Coordination Polymers Based on 1,3-Di(2,4-dicarboxyphenyl) Benzene and 1,3-Di(4-pyridyl)propane

Two new 2D coordination polymers, [Zn(HL)(Hbpp)]n(1) and [Cd(HL)(Hbpp)(H2O)]n(2)(H4L = 1,3-di(2,4-dicarboxyphenyl) benzene, bpp = 1,3-di(4-pyridyl)propane), have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction analysis, elemental analysis, TGA and IR spectroscopy. Complex 1 crystallizes in monoclinic, space group P21/n, with a = 13.1031(6), b = 14.7315(7), c = 15.0041(7) A, β = 91.202(1)°, V = 2895.6(2) A3, Dc = 1.532g/cm3, Mr = 667.97, F(000) = 1376.0, μ = 0.909 mm–1, Z = 4, the final R = 0.0481 and wR = 0.1304 for 7027 observed reflections with I 2σ(I). Complex 2 also belongs to the monoclinic space group P21/n, with a = 13.6326(4), b = 14.6432(4), c = 14.9395(5) A, β = 93.132(1)o, V = 2977.84(16) A3,Dc = 1.613 g/cm3, Mr = 1445.98, F(000) = 733.0, μ = 0.794 mm–1, Z = 2, the final R = 0.0283 and w R = 0.0784 for 7230 observed reflections with I 2σ(I). Both complexes 1 and 2 form 2D net structures, which are further linked to form 3D supramolecular net structures via intermolecular hydrogen bonds and aromatic π-π stacking interactions.     

Hydrothermal Synthesis,Crystal Structure and Properties of a Lanthanum(Ⅲ) Complex Based on a N,O-Donor Ligand

A novel metal-organic complex [La(o-NCP)3]n(o-HNCP = 2-(2-carboxyphenyl)imidazo(4,5- f)(1,10)-phenanthroline) has been hydrothermally synthesized and characterized by elemental analysis, infrared analysis and X-ray single-crystal diffraction. The complex crystallizes in triclinic, space group P1 with a = 9.898(2), b = 16.193(3), c = 16.909(3) , α = 67.68(3), β = 80.85(3), γ = 78.78(3)o, V = 2448.2(8) A3, Z = 2, Mr = 1156.9, Dc = 1.569 g/cm3, μ = 0.71073 A, F(000) = 1164, GOOF = 1.065, the final R = 0.051 and wR = 0.123 for 8539 observed reflections with I 2A(I). The complex exhibits a one-dimensional double chain structure. The adjacent chains are further connected by N–H...N hydrogen bonds which help to form a two-dimensional supramolecular architecture. Furthermore, the complex exhibits excellent thermal stability and luminescent property.     

Thiocyanate-controlled Copper(Ⅱ)-L-arginine Complex:Synthesis,Crystal Structure and Characterization

A novel thiocyanate-controlled copper(Ⅱ)-L-arginine complex with the formula of Cu(Arg)(SCN)_2(1,Arg:L-arginine) has been obtained from aqueous solution and structurally characterized by single-crystal X-ray diffraction method.Crystal data:orthorhombic,space group P2_12_12_1,a = 6.0156(5),b = 12.1905(11),c = 18.4203(16) ?,V = 1350.8(2) ?~3,Z = 4,μ = 1.933mm~(-1),F(000) = 724,S = 1.084,the final R = 0.0410,wR = 0.0754 for 1893 observed reflections with I 2σ(I),and R = 0.0559,wR = 0.0820 for all reflections.In addition,elemental analysis,IR,TG-DTG and magnetism characterization are presented.     

Synthesis, Crystal Structure and Ferromagnetic Properties of a New Dicyanamide Bridged Dicopper(Ⅱ) Complex with IM-1'-MeBzIm-κ2 N, O Mode

A new dinuclear copper(Ⅱ) complex with imino nitroxide radicals [Cu2(NO3)2(IM-1'-MeBzlm)2(dca)2] (IM-1'-MeBzlm = 2-{2'-[(1'-methyl)benzimidazolyl]}-4,4,5,5-tetramethylimi-dazoline-1-oxyl, dca = dicyanamide anion) has been prepared and structurally characterized by single-crystal X-ray diffraction. The complex crystallizes in triclinie, space group P1, with a =9.440(5), b = 10.124(6), c = 11.603(7)(A°), α= 102.904(7),β = 94.033(6), γ= 104.299(7)°,C34H40Cu2N16O8, Mr= 927.90, V= 1038.2(10) (A°)3, Z = 1, Dc=1.484 g/cm3,μ(MoKα) = 1.093 mm-1,F(000) = 478, R = 0.0609 and wR = 0.1512 for 2889 observed reflections with I > 2σ(I). X-ray analysis reveals that two Cu(Ⅱ) atoms are bridged by two dicyanamides to form a centrosymmetric Cu(Ⅱ)-Cu(Ⅱ) dinuclear entity. Every Cu(Ⅱ) ion is five-coordinated with a distorted square pyramidal coordination geometry and IM-1'-MeBzlm ligand coordinates to the metal ion with the κ2 N(1'-MeBzlm), O(IM) mode to avoid steric hindrance with the methyl group in the complex. Meanwhile, the molecules are linked by intermolecular hydrogen bonds, leading to a 1-D chain structure. Moreover, such chains are further linked by π-π stacking interactions to form a 2-D network structure. Magnetic measurement demonstrates that the intramolecular exchange couplings between Cu(Ⅱ) ion and the IM-1'-MeBzlm are ferromagnetic with J = 12.46 cm-1, where the spin Hamitonian is defined as H= -2JS1S2 within the complex.