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  • 1
    Electronic Resource
    Electronic Resource
    Gallic acid monohydrate (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. o764-o766 
    Details
    ISSN: 1600-5368
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: In the crystal structure of the title compound, 3,4,5-trihydroxybenzoic acid monohydrate, C7H6O5·H2O, the gallic acid molecule is essentially planar and has two intramolecular hydrogen bonds between hydroxyl groups. The H atoms of the three hydroxyl groups are oriented in the same direction around the ring, and form intra- and intermolecular hydrogen bonds. The crystal structure is stabilized by all available intermolecular hydrogen bonds, including also those involving the water molecule.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S1600536801012041
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  • 2
    Electronic Resource
    Electronic Resource
    2,3-Dihydroxybenzoic acid (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. o1224-o1226 
    Details
    ISSN: 1600-5368
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title compound, C7H6O4, crystallizes with two independent molecules in the asymmetric unit and forms a two-dimensional structure in the solid state. This is facilitated by a network of hydrogen-bonding interactions. There are two intramolecular hydrogen bonds, one between adjacent hydroxyl groups and the other between between the hydroxyl group and the carbonyl O atom. The crystal structure is stabilized both by carboxylic acid dimer formation and by interactions between the carboxyl and hydroxyl groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S1600536801018682
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  • 3
    Electronic Resource
    Electronic Resource
    Bisaquabis(8-hydroxyquinolinato-N,O)copper(II) (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. m251-m252 
    Details
    ISSN: 1600-5368
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title compound, [Cu(C9H6NO)2(H2O)2], has a distorted octahedral geometry. The two N,O-bidentate ligand molecules lie in a trans geometry, in which the six-coordinate CuII ion lies on an inversion center.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S1600536801008297
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  • 4
    Electronic Resource
    Electronic Resource
    Di-μ-chloro-bis[(2-pyridinecarboxylato-N,O)(2-pyridinecarboxylic acid-N,O)cadmium(II)] ethanol solvate (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. m371-m372 
    Details
    ISSN: 1600-5368
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: In the title compound, [Cd2Cl2(C6H4NO2)2(C6H5NO2)2]·C2H5OH, each Cd atom has a distorted octahedral coordination geometry defined by two N atoms of the pyridine rings, two O atoms of the carboxylate groups and two Cl atoms. Two bridging Cl atoms and an ethanol solvent molecule lie on mirror planes. Symmetrical hydrogen bonds link the carboxylate/carboxylic acid ligands of adjacent molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S1600536801011904
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  • 5
    Electronic Resource
    Electronic Resource
    trans-Diaquabis(quinoline-2-carboxylato-N,O)nickel(II)–water–ethanol (1/2/2) (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. m267-m269 
    Details
    ISSN: 1600-5368
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title compound, [Ni(C10H6NO2)2(H2O)2]·2H2O·2C2H5OH, contains a six-coordinate NiII ion displaying distorted octahedral coordination geometry defined by the two quinoline N atoms, two O atoms of the carboxylate groups and two O atoms of the water molecules. All of the corresponding pairs of ligand atoms lie in trans positions with respect to each other, the Ni atom lying on an inversion center. Molecules are linked together by an intermolecular hydrogen-bonding network involving the uncoordinated water and ethanol molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S1600536801009138
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  • 6
    Electronic Resource
    Electronic Resource
    3,4-Dihydroxyphenylacetic acid (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. o715-o716 
    Details
    ISSN: 1600-5368
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: In the title compound, C8H8O4, the acetic acid side chain adopts a roughly perpendicular orientation with respect to the phenyl ring. Hydrogen bonding between carboxyl groups results in the formation of a centrosymmetric dimer. An intramolecular hydrogen bond is formed in the catechol part of the molecule. Molecules are linked together through hydrogen bonds between hydroxyl and carboxylic acid O atoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S1600536801011151
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  • 7
    Electronic Resource
    Electronic Resource
    L-Kynureninium sulfate dihydrate (2000)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. e416-e417 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: In the structure of the title compound, 2-(3-ammonio-3-carboxypropanoyl)-1-anilinium sulfate dihydrate, C10H14N2O32+·SO42−·2H2O, the two amino groups are protonated. The molecule has a trans planar zigzag carbon-skeletal conformation elongated nearly in the benzene ring plane. The two amino and the carboxyl groups are located on the same side of the molecule. The crystal structure is stabilized by intermolecular hydrogen bonds involving the water molecules and the sulfate ion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270100011100
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  • 8
    Electronic Resource
    Electronic Resource
    Bis(μ-pyridine-2,6-carboxylato-O,N,O′:O)bis[triaquamanganese(II)]–pyridine-2,6-dicarboxylic acid (1/2) (2000)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. 1416-1417 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: In the structure of the title compound, [Mn2(C7H3NO4)2(H2O)6]·2C7H5NO4, a centrosymmetric dinuclear complex, hexaaaquabis(pyridine-2,6-dicarboxylato)dimanganese(II) and free pyridine-2,6-dicarboxylic acid are present in a 1:2 ratio. In the complex, each Mn2+ ion is coordinated by three O atoms and one N atom from the pyridine-2,6-dicarboxylate ligands and by three water O atoms, resulting in a distorted pentagonal bipyramidal coordination. Within the centrosymmetric dinuclear complex, two Mn2+ ions are bridged by two carboxylate O atoms. The crystal structure is stabilized by hydrogen bonds involving all the H atoms of the water ligands.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270100012786
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  • 9
    Electronic Resource
    Electronic Resource
    catena-Poly[[diaqualithium(I)]-μ-[9H-purine-2,6(1H,3H)-dionato-O2:N7]] (2000)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. 1418-1419 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: In the title compound, [Li(C5H3N4O2)(H2O)2]n, the coordinate geometry about the Li+ ion is distorted tetrahedral and the Li+ ion is bonded to N and O atoms of adjacent ligand molecules forming an infinite polymeric chain with Li—O and Li—N bond lengths of 1.901 (5) and 2.043 (6) Å, respectively. Tetrahedral coordination at the Li+ ion is completed by two cis water molecules [Li—O 1.985 (6) and 1.946 (6) Å]. The crystal structure is stabilized both by the polymeric structure and by a hydrogen-bond network involving N—H...O, O—H...O and O—H...N hydrogen bonds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270100011999
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  • 10
    Electronic Resource
    Electronic Resource
    Copper(II) and zinc(II) complexes of pyridine-2,6-dicarboxylic acid (2000)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. 305-307 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title compounds, bis(pyridine-2,6-dicarboxylato-N,O,O′)copper(II) monohydrate, [Cu(C7H4NO4)2]·H2O, andbis(pyridine-2,6-dicarboxylato-N,O,O′)zinc(II) trihydrate, [Zn(C7H4NO4)2]·3H2O, have distorted octahedral geometries about the metal centres. Both metal ions are bonded to four O atoms and two pyridyl-N atoms from the two terdentate ligand molecules, which are nearly perpendicular to each other. The copper(II) complex has twofold crystallographic symmetry and contains two different ligand molecules, one of which is neutral and another doubly ionized. In contrast, the zinc(II) complex contains two identical singly ionized ligand molecules. Both crystal structures are stabilized by O—H...O intermolecular hydrogen bonds between the complex and the water molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270199015565
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