Showing papers on "Coordination polymer published in 1996"
TL;DR: The spin state of Fe(C5H5N)2Ni(CN)4 changes from paramagnetic to diamagnetic when the temperature is lowered as discussed by the authors, while the spin state for Fe(NH3)2N(CN4)4·2C6H6 does not.
Abstract: The iron(II) spin state of Fe(C5H5N)2Ni(CN)4 changes from paramagnetic to diamagnetic when the temperature is lowered, while that of Fe(NH3)2Ni(CN)4·2C6H6 does not.
225 citations
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129 citations
TL;DR: In this article, the crystal and molecular structure of a lanthanum mellitate, La2C12H22O23, has been determined by X-ray structural analysis using a combination of direct and heavy atom methods.
Abstract: The crystal and molecular structure of a lanthanum(III) mellitate, La2C12H22O23, has been determined by X-ray structural analysis using a combination of direct and heavy atom methods. The complex crystallizes in the monoclinic space group P21/n with unit-cell dimensions of a = 6.723(4), b = 11.368(5), c = 29.813(4) A and β = 95.851(3)°. Block-diagonal least-squares refinement using automated diffractometer-collected data resulted in R = 2.5 and Rw = 3.4. The crystal structure consists of layers perpendicular to the a axis. Each layer is formed by an extended network of lanthanum ions coordinated with mellitate anions and water molecules, and linked through a complex three-dimensional hydrogen-bonding network. Among the six carboxylate groups of the mellitate anion, five form coordination bonds to six lanthanum atoms. The two independent lanthanum ions are both nine-coordinate and the configuration around lanthanum is a tricapped trigonal prism with the La-O bond distances ranging from 2.457 A to ...
38 citations
TL;DR: In this article, an aqueous solution of K3Fe(CN)6 reacts with an acetonitrile solution of Ph3SnCl to form the red-layered polymeric compound (Ph3Sn)3 Fe(CN),6·H2O·2CH3CN.
Abstract: An aqueous solution of K3Fe(CN)6 reacts with an acetonitrile solution of Ph3SnCl to form the red layered polymeric compound (Ph3Sn)3Fe(CN)6·H2O·2CH3CN. The structure of the compound contains one semilinear chain and one zigzag chain. The zigzag sheets formed by those two chains are connected by hydrogen bonds. Channels formed by the chains are filled with phenyl rings on tin atoms and the acetonitrile solvent molecules.
34 citations
TL;DR: In this paper, the structure analysis has been achieved under a cooled-N2 flow both for the black coordination polymer (tetraphenylethanediyl)dicesium bis(diglyme) ([(Ph2CCPh2)2-(Cs+-OCH2CH2OCH3)2]∞), which exhibits the expected cyanine distortion with the molecular halves -C(C6H5)2 twisted by 76° around the central CC single bond of 1.51 A length.
32 citations
TL;DR: In this article, the reaction of CdBr2 with (H2biim = 2,2′-biimidazole) in an aqueous solution affords the linear coordination polymer [CdBr 2 n]n.
27 citations
TL;DR: The two-dimensional coordination polymer K3Co(CN)6·2Rh2(O2CMe)4, with a square lattice forms on reaction of an aqueous solution of k3Co[CN]6 with a thf solution of rh2[CMe]4.
26 citations
TL;DR: In this article, the 2-D double-layer-type coordination polymer was crystallized in the orthorhombic space group P212121, where the two different Cu(II) centers in the lattice are distinguished only be the direction of the Jahn-Teller distortion.
Abstract: [Co{HB(C2H2N3)3}2] reacts with an excess of CuCl2 in hot water with formation of ∞2[Cu2Cl2{μ3-HB(C2H2N3)3}2 · 2 H2O] (7) or ∞3{[Cu2{μ4-HB(C2H2N3)3} (μ-OH)2]Cl · 6 H2O} (8), depending on the reaction time. 8 can also be obtained from [Cu{HB(C2H2N3)3}2] and CuCl2 in aqueous ammonia. The 2-D double-layer-type coordination polymer 7 crystallizes in the orthorhombic space group P212121. The two different Cu(II) centers in the lattice are distinguished only be the direction of the Jahn-Teller distortion. The following corresponding distances for the CuClN5 coordination sphere were found Cu1/Cu2–Cl = 2.572(2)/2.328(2), Cu1/Cu2–N = 2.585(5)/2.077(4); 2.000(4)/1.979(5); 2.100(5)/2.734(5); 2.005(4)/1.994(4); 2.024(5)/2.369(5). In the 3-D coordination polymer 8 one of the two different Cu centers is chelated by the three endodentate nitrogen donors, while the other Cu center is coordinated by three exodentate nitrogen atoms. The coordination sphere is completed in both cases by two hydroxo bridges to symmetry-related Cu centers. The metal-ligand connectivity creates infinite channels with helical walls which contain the solvated chloride anions.
26 citations
TL;DR: The synthesis, structural characterization, and electrochemical properties of a Ni(II) complex derived from the template reaction of N,N'-bis(2-mercaptoethyl)-1,5-diazacyclooctane nickel(II), Ni-1, with ICH( 2)CO(2)Na are described.
Abstract: The synthesis, structural characterization, and electrochemical properties of a Ni(II) complex derived from the template reaction of N,N'-bis(2-mercaptoethyl)-1,5-diazacyclooctane nickel(II), Ni-1, with ICH(2)CO(2)Na are described. Blue N-(3-thiabutyl)-N'-(3-thiapentanoate)-1,5-diazacyclooctanenickel(II)iodide, [(tbtp-daco)Ni][I], [5]I, contains Ni(II) in an octahedral environment with N(2)S(2)O(2) donor atoms; one oxygen is from an adjacent [(tbtp-daco)Ni] ion and has the same distance to Ni(II) as the intramolecular oxygen, resulting in a coordination polymer. Complex [5]I.H(2)O, C(13)H(27)N(2)O(3)S(2)NiI, crystallizes in the orthorhombic space group Pbca with a = 10.898(3), b = 18.103(5), c = 19.020(5), and Z = 8. The extent to which the polymer is retained in solution is counterion dependent, which influences redox properties (accessibility of Ni(I) and Ni(III)).
22 citations
TL;DR: In this paper, Thiophene-fused DCNQI compounds yield conducting CuI complexes built up of a unique three-dimensional supramolecular coordination structure in which the zigzag ladder CuI polymers are bridged by the π-stacked acceptors as a bidentate ligand.
TL;DR: An example of proton conduction in a coordination polymer was examined in this paper, where the dependence of specific conductivity on hydrogen pressure was quite strong in the title compound with a few types of protodes.
Abstract: An example of proton conduction in a coordination polymer was examined. Dependence of the specific conductivity on hydrogen pressure was quite strong in the title compound with a few types of protodes. The mechanism of electric conduction of this coordination polymer is discussed in connection with related phenomena of the same compound.
TL;DR: In this paper, two novel coordination polymer compounds, [Cu(DMTPN)2]X(DMTMTPN)(thf) (DMTPNs = 2,5-dimethylterephthalonitrile, X = BF4 (l) and ClO4 (2)) are prepared and characterized by single crystal X-ray analysis; both are isostructural and have threefold interpenetrated diamondoid structure with π-π stacking column of alternate coordinated and uncoordinated DMTPN.
Abstract: Two novel coordination polymer compounds, [Cu(DMTPN)2]X(DMTPN)(thf) (DMTPN = 2,5-dimethylterephthalonitrile, X = BF4 (l) and ClO4 (2)) are prepared and characterized by single crystal X-ray analysis; both are isostructural and have three-fold interpenetrated diamondoid structure with π–π stacking column of alternate coordinated and uncoordinated DMTPN.
TL;DR: In this paper, the viscosity behavior of polymer melts containing complexes formed between the neutralized polyester poly(diethylene glycol-co-succinic acid) and Zn acetates is discussed.
Abstract: The viscosity behavior of polymer melts containing complexes formed between the neutralized polyester poly(diethylene glycol-co-succinic acid) and Zn acetates is discussed. The melt viscosity of these materials increases with the concentration of metal ions, and shows strong thixotropy and shear thinning. This behavior is attributed to the formation of coordination bonds between the electron donor groups within the polyester chain, and empty coordination sites of the various Zn acetate salts. The coordination complexes were obtained in situ in the polymer melt, which contains well-dispersed ZnO, by adding an equimolar amount of CH3COOH. It is proposed that the shear applied to the polymer melt destroys the polar network of the coordination polymer at a rate that is greater than the rate of reformation of the coordination bonds for the sample returning back to equilibrium, following a shear deformation.
TL;DR: In this article, a 2.5-Dihydroxy-p-benzoquinonatonickel(II) [dhqNi(II)] coordination polymer was carefully prepared from 2,5-dihydroxypenzoquinone (L) and anhydrous nickel (II) chloride.
Abstract: 2,5-Dihydroxy-p-benzoquinonatonickel(II) [dhqNi(II)] coordination polymer was carefully prepared from 2,5-dihydroxy-p-benzoquinone (L) and anhydrous nickel(II) chloride. The elemental and thermal analyses indicate two coordinated and one additive water molecules in the dhqNi(II) complex. A strong peak in IR spectrum at 3330 cm−1 and a shoulder at 1660 cm−1attributed to O–H stretching vibration were detected. The paramagnetic moment of the complex, μeff = 2.94 μB, was calculated from the observed susceptibility. Consequently, dhqNi(II) coordination polymer seemed to be D4h structure, where Ni was coordinated by two ligand water molecules and four oxygen atoms from two ligand (dhq2−) molecules.
TL;DR: In this paper, a title compound was synthesized and characterized in the orthorhombic space group Cmcm with a = 7.004(2) A, b = 12.748 A, c = 13.665 A, V = 1220.1(3) A3 and Z = 4.70 cm−1.
Abstract: A title compound has been synthesized and characterized. The complex crystallizes in the orthorhombic space group Cmcm with a = 7.004(2) A, b = 12.748(2) A, c = 13.665(2) A, V = 1220.1(3) A3 and Z = 4. The complex consists of two-dimensional square arrays of nickel(II) ions bridged by pzdc2 and pyz ligands. Each nickel ion has a slightly distorted octahedral coordination with N4O2 chromopher. The magnetic susceptibility data over a range of 2–300 K were fitted by using an Heisenberg antiferromagnet with a mean field approximation. The obtained J and zJ' values are −1.70 cm−1 and −0.70 cm−1, respectively.