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  • 1
    Electronic Resource
    Electronic Resource
    The 1:1 complex of 4-nitrophenol and 4-methylpyridine (2000)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. e69-e70 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: 4-Nitrophenol and 4-methylpyridine form a 1:1 hydrogen-bonded dimer, C6H5NO3.C6H7N, with the molecules linked by an O—H...N hydrogen bond [O...N 2.668 (2) Å]. The dihedral angle between the phenyl and pyridine ring is 57.8 (4)°. The dimers pack in a herring-bone structure in the crystal lattice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270100001074
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  • 2
    Electronic Resource
    Electronic Resource
    2,6-Dinitrotoluene (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. o827-o828 
    Details
    ISSN: 1600-5368
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Crystals of 2,6-dinitrotoluene, C7H6N2O4, were obtained from a methanol solution of the mixture of 2,6- and 2,4-dinitrotoluene. The P212121 space group shows the compound is chiral, but the absolute configuration was not determined reliably. The nitro group planes are inclined to the benzene plane with dihedral angles of 53.1 (1) and 38.1 (1)°, respectively. The repulsion between methyl and nitro groups results in a rather small C—C—C angle of 112.6 (2)° within the benzene ring.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S1600536801013022
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  • 3
    Electronic Resource
    Electronic Resource
    Redetermination of racemic tartaric acid monohydrate (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. o428-o429 
    Details
    ISSN: 1600-5368
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The structure of the title compound, 2,3-dihydroxysuccinic acid monohydrate, C4H6O6·H2O, (I), was first determined (to R = 0.22) and reported by Parry [Acta Cryst. (1951), 4, 131–138]. We present here a redetermination with significantly improved accuracy. In the centrosymmetric crystals (space group P\overline 1, Z = 2), the enantiomeric molecules with both D- and L-configurations co-exist. An extensive intermolecular hydrogen-bond system involves hydrogen bonds formed by carboxyl and hydroxyl groups of the tartaric acid molecule, as well as the crystalline water molecule.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S1600536801006158
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  • 4
    Electronic Resource
    Electronic Resource
    Dichloro(2,2′-diamino-4,4′-bi-1,3-thiazole-N3,N3′)copper(II) (2001)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. 354-355 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title complex, [CuCl2(C6H6N4S2)], has a flattened tetrahedral coordination. The CuII atom is located on a twofold rotation axis and is coordinated by two N atoms from a chelating 2,2′-diamino-4,4′-bi-1,3-thiazole ligand and by two Cl atoms. Intramolecular hydrogen bonding exists between the amino groups of the 2,2′-diamino-4,4′-bi-1,3-thiazole ligand and the Cl atoms. The intermolecular separation of 3.425 (1) Å between parallel bithiazole rings suggests there is a π–π interaction between them.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270100020163
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  • 5
    Electronic Resource
    Electronic Resource
    Crystal structure of 2,6-dimethylpyridinium hydrogen phthalate (2000)
    Springer
    Journal of chemical crystallography 30 (2000), S. 119-122 
    Details
    ISSN: 1572-8854
    Keywords: phthalic acid ; 2, 6-dimethylpyridine ; crystal structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A new crystal of 2,6-dimethylpyridinium hydrogen phthalate (DPMHP) has been prepared and characterized by x-ray crystallography. DPMHP crystallizes in the monoclinic space group C2/c with a = 26.105(3), b = 8.2250(10), c = 13.8750(10) Å, β = 116.02(1)°, V = 2677.2(5) Å3, and Z = 8. The 2,6-dimethylpyridinium (DPM) is held with the hydrogen phthalate ion (HPI) by intermolecular hydrogen bond of N-H-O. A noncentered hydrogen atom is involved in the short intramolecular hydrogen of O-O [2.398(2) Å] between the neighboring carboxylic groups. The phenyl ring of the HPI appears to be deformed in comparison with the original. The entity of HPI in itself and DMPMHP as a whole are arranged in a rumple pattern. The geometrical arrangement in the crystal structure is characterized by the formation of laminar ribbons of DPMHP.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009521729823
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