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A coordination polymer of CdII with benzene-1,3-dicarboxylate and 1,4-bis[1-(2-pyridylmethyl)benzimidazol-2-yl]butane
Wei-Ping Zhang,Wen-Xiu Zhao,Gui-Hua Cui,Shun-Fu Dong
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809043360
Abstract: The title CdII coordination polymer, catena-poly[[{1,4-bis[1-(2-pyridylmethyl)benzimidazol-2-yl]butane}cadmium(II)]-μ-benzene-1,3-dicarboxylato], [Cd(C8H4O4)(C30H28N6)]n, was obtained by reaction of CdCO3, benzene-1,3-dicarboxylic acid (H2btc) and 1,4-bis[1-(2-pyridylmethyl)benzimidazol-2-yl]butane (L). The CdII cation is six-coordinated by an N2O4-donor set. L acts as a bidentate ligand and btc anions link CdII centers into a chain propagating parallel to [010].
Bis{1,4-bis[(3-butylimidazolium-1-yl)methyl]benzene}silver(I) bis(hexafluoridophosphate)
Rosenani A. Haque,Abbas Washeel,Siang Guan Teoh,Madhukar Hemamalini
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810036524
Abstract: The asymmetric unit of the title complex, [Ag2(C22H30N4)2](PF6)2, consists of one AgI ion, one 1,4-bis[(3-butylimidazolium-1-yl)methyl]benzene ligand and one discrete hexafluoridophosphate anion. The formula unit is generated by an inversion center. The unique AgI ion is coordinated by two C atoms of two heterocyclic carbene ligands in an essentially linear geometry. In the crystal structure, cations and anions are linked through weak C—H...F hydrogen bonds, forming a three-dimensional network.
1,4-Bis(imidazol-1-yl)benzene–terephthalic acid (1/1)
Shiyong Zhang,Yurong Tang,Zhihua Mao,Mingliang Li
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536808040324
Abstract: In the title compound, C12H10N4·C8H6O4, 1,4-bis(imidazol-1-yl)benzene and terephthalic acid molecules are joined via strong O—H...N hydrogen bonds to form infinite zigzag chains. Both molecules are located on crystallographic inversion centers. The O—H...N hydrogen-bonded chains are assembled into two-dimensional layers through weak C—H...O and strong π–π stacking interactions [centroid–centroid distance = 3.818 (2) ], leading to the formation of a three-dimensional supramolecular structure.
Metal Ion Enhanced Charge Transfer in a Terpyridine-bis-Pyrene System  [PDF]
Anthony D’Aléo,Elio Cecchetto,Luisa De Cola,René M. Williams
Sensors , 2009, DOI: 10.3390/s90503604
Abstract: The synthesis, electrochemical and photophysical properties of a branched molecule 3,5-bis(pyrene-1-yl)-4'-phenyl-2,2':6',2''-terpyridine are reported. Spectroscopy in different solvents reveals that an optical electron transfer from the pyrene donor to the terpyridyl electron acceptor can occur in polar media, as the system displays both charge transfer (CT) absorption and CT emission. Furthermore, the study of the zinc complex as well as the bis-protonated form shows an enhancement of the electron transfer character of the system, by an increase of the acceptor strength. This is accompanied by a large increase of the non-radiative processes. With sub-nanosecond transient absorption spectroscopy, the CT state, consisting of the pyrene radical cation and the terpyridine radical anion, has been detected. At room temperature, the study of the nanosecond transient absorption spectra reveals the formation of a low-lying triplet excited state that we attribute to the pyrene moiety through which the CT state decays. At 77K, the absence of the terpyridine triplet emission also suggests the population of a low-lying triplet state of the pyrene unit.
[2,6-Bis(5-chloropyrimidin-2-yl-κN)pyridine-κN](2,2′:6′,2′′-terpyridine-κ3N,N′,N′′)ruthenium(II) bis(hexafluoridophosphate) acetonitrile disolvate
Elaine A. Medlycott,Jianhua Wang,Garry S. Hanan
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536807068602
Abstract: In the title compound, [Ru(C13H7Cl2N5)(C15H11N3)](PF6)2·2CH3CN, the RuII atom is coordinated in a distorted octahedral geometry by a tridentate 2,2′:6′,2′′-terpyridine ligand and a tridentate 2,6-bis(5-chloropyrimidin-2-yl)pyridine ligand. Least-squares mean-plane distortions of only 1.72 (2) and 2.91 (2)° of the pyrimidyl rings with respect to the central pyridine are observed for the bis(pyrimidyl)pyridine-based tridentate ligand, while the distal pyridyl rings of terpyridine twist by 13.43 (7) and 4.68 (9)° away from the central pyridine ring.
Reaction of nitrilimines with 1,4-bismaleimidobenzene
Hany M. M. Dalloul
Bulletin of the Chemical Society of Ethiopia , 2011,
Abstract: A series of 1,4-bis(3-aroyl-1-aryl-3a,4,6,6a-tetrahydro-1H,5H-pyrrolo[3,4-c]pyrazol-4,6-dion-5-yl)benzene was synthesized by the reaction of 1,4-bis-maleimidobenzene with appropriate nitrilimines. The microanalysis and spectral data of the synthesized compounds are in full agreement with their molecular structures.
catena-Poly[[bis(2-aminoethanesulfonato-κ2N,O)nickel(II)]-μ-1,4-bis(1H-imidazol-1-yl)benzene-κ2N3:N3′]  [cached]
Jin-Biao Liu
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811009238
Abstract: In the hydrothermally prepared title coordination polymer, [Ni(C2H6NO3S)2(C12H10N4)]n, the NiII ion and the 1,4-bis(1H-imidazol-1-yl)benzene ligand occupy special positions on inversion centers. The metal ion shows a slightly distorted octahedral coordination geometry, being linked to two N atoms of two 1,4-bis(imidazol-1-yl)benzene ligands and to two O and two N atoms of two chelating 2-aminoethanesulfonate ligands. The 1,4-bis(imidazol-1-yl)benzene ligands bridge symmetry-related NiII ions forming polymeric chains along the [110] direction.
Reaction of nitrilimines with 1,4-bismaleimidobenzene
Hany M. M. Dalloul
Bulletin of the Chemical Society of Ethiopia , 2011,
Abstract: A series of 1,4-bis(3-aroyl-1-aryl-3a,4,6,6a-tetrahydro-1H,5H-pyrrolo[3,4-c]pyrazol-4,6-dion-5-yl)benzene was synthesized by the reaction of 1,4-bis-maleimidobenzene with appropriate nitrilimines. The microanalysis and spectral data of the synthesized compounds are in full agreement with their molecular structures. KEY WORDS: Fusedpyrazoles, 1,4-Bismaleimidobenzene, Nitrilimines, Cycloaddition Bull. Chem. Soc. Ethiop. 2011, 25(3), 465-468.
1,4-Bis(4,5-dihydro-1H-imidazol-2-yl)benzene–terephthalic acid–water (1/1/4)
Shao-Ming Shang,Su-Yun Li,Chun-Xia Ren,Xin Wang
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809040616
Abstract: The asymmetric unit of the title compound, C12H14N4·C8H6O4·4H2O, consists of one half of the 1,4-bis(4,5-dihydro-1H-imidazol-2-yl)benzene (bib) molecule, one half of the terephthalic acid (TA) molecule and two water molecules. Both the bib and the TA molecules reside on crystallographic inversion centers, which coincide with the centroids of the respective benzene rings. The bib and the TA, together with the water molecules, are linked through intermolecular O—H...O, O—H...N and N—H...O hydrogen bonds, forming a three-dimensional network of stacked layers. Weak intermolecular C—H...O contacts support the stability of the crystal structure.
catena-Poly[[aqua[1,4-bis(1H-imidazol-4-yl)benzene]cadmium]-μ3-5-methylisophthalato]  [cached]
Sen-Lin Yang,De-Hai Wang,Shui-Sheng Chen
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811030509
Abstract: In the title coordination polymer, [Cd(C9H6O4)(C12H10N4)(H2O)]n, the CdII atom has a NO6 donor set and is coordinated by five carboxylate O atoms from three different 5-methyl-1,3-phenylenediacetate (pda2 ) anions, one O atom from a water molecule and one N atom from a 1,4-bis(1H-imidazol-4-yl)benzene (L) ligand, displaying a highly distorted pentagonal–bipyramidal geometry. Each pda2 anion acts as a μ3-bridge, linking CdII atoms to form one-dimensional slabs extending parallel to [010]. In the crystal, adjacent molecules are linked through N—H...N and N—H...O hydrogen bonds into a three-dimensional network.
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