Publications (27)9.02 Total impact

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    Wei-Wei Li · Tie-Ming Yu · Lu-Ping Lv · Xian-Chao Hu
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    ABSTRACT: The title compound, C(9)H(10)N(2)O(3)center dot 2H(2)O, crystallizes with two organic molecules and four water molecules in the asymmetric unit. Both organic molecules adopt a trans conformation with respect to the C=N bond and are close to planar [dihedral angles between the side chain and the aromatic ring = 9.34 (8) and 4.96 (8)degrees]. In the crystal, the components are linked into three-dimensional network by N-H center dot center dot center dot O and O-H center dot center dot center dot O hydrogen bonds.
    Preview · Article · Oct 2011 · Acta Crystallographica Section E Structure Reports Online
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    Lu-Ping Lv · Tie-Ming Yu · Wen-Bo Yu · Wei-Wei Li · Xian-Chao Hu
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    ABSTRACT: In the title mol-ecule, C(7)H(8)N(2)O(2), the acetohydrazide group is planar within 0.014 (2) Å and forms a dihedral angle of 5.35 (8)° with the furan ring. The mol-ecule adopts a trans configuration with respect to the C=N bond. In the crystal, molecules are linked into a chain along the a axis by N-H⋯O hydrogen bonds.
    Preview · Article · Sep 2009 · Acta Crystallographica Section E Structure Reports Online
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    ABSTRACT: The title compound, C10H12N2O3, crystallizes with two independent molecules in the asymmetric unit which differ in the orientation of the methoxy group. Each independent molecule adopts a trans configuration with respect to the C=N bond. In the crystal structure, molecules are linked into chains running along [001] by N-H center dot center dot center dot O and N-H center dot center dot center dot N hydrogen bonds. In addition, an intermolecular C-H center dot center dot center dot pi interaction is observed.
    Preview · Article · Sep 2009 · Acta Crystallographica Section E Structure Reports Online
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    ABSTRACT: In the title compound, C9H10N2O3, the Schiff base molecule is approximately planar, the dihedral angle between the benzene ring and the acetohydrazide group (r.m.s. deviation = 0.034 angstrom) being 8.81 (7)degrees. An intramolecular O-H center dot center dot center dot O hydrogen bond is observed. In the crystal, molecules are linked into a three-dimensional network by O-H center dot center dot center dot O, N-H center dot center dot center dot O and C-H center dot center dot center dot O hydrogen bonds.
    Preview · Article · Sep 2009 · Acta Crystallographica Section E Structure Reports Online
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    Wei-Wei Li · Tie-Ming Yu · Wen-Bo Yu · Lu-Ping Lv · Xian-Chao Hu
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    ABSTRACT: The title compound, C(11)H(15)N(3)O, crystallizes with two independent mol-ecules per asymmetric unit which differ slightly in their side-chain orientations: the C=N-N-C torsion angle is -176.2 (3)° in one of the mol-ecules and -179.83 (3)° in the other. Each independent mol-ecule adopts a trans configuration with respect to the C=N bond. The two independent mol-ecules are related by a pseudo-inversion center and they exist as a N-H⋯O hydrogen-bonded dimer. The dimers are linked into zigzag chains along [100] by C-H⋯O hydrogen bonds.
    Preview · Article · Sep 2009 · Acta Crystallographica Section E Structure Reports Online
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    Lu-Ping Lv · Tie-Ming Yu · Wen-Bo Yu · Wei-Wei Li · Xian-Chao Hu
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    ABSTRACT: In the title compound, C9H10N2O3 center dot H2O, the Schiff base molecule is approximately planar, the dihedral angle between the benzene and acetohydrazide planes being 5.40 (7)degrees. An intramolecular O-H center dot center dot center dot O hydrogen bond is observed. In the crystal, molecules are linked into a two-dimensional network parallel to (100) by O-H center dot center dot center dot O, N-H center dot center dot center dot O, O-H center dot center dot center dot N and C-H center dot center dot center dot O hydrogen bonds, and by pi-pi interactions between symmetry-related benzene rings [centroid-centroid distance = 3.543 (2) angstrom].
    Preview · Article · Aug 2009 · Acta Crystallographica Section E Structure Reports Online
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    Lu-Ping Lv · Tie-Ming Yu · Wen-Bo Yu · Wei-Wei Li · Xian-Chao Hu
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    ABSTRACT: In the title compound, C(9)H(10)N(2)O(2)·H(2)O, the mol-ecular skeleton of the acetohydrazide mol-ecule is nearly planar [within 0.014 (1) Å]. The mol-ecule adopts a trans configuration with respect to the C=N bond, while the side chain is slightly twisted away from the attached ring, forming a dihedral angle of 9.975 (8)°. The crystal packing exhibits a three-dimensional network composed from alternating acetohydrazide mol-ecules and uncoordinated water mol-ecules, which inter-act via N-H⋯O, O-H⋯O and O-H⋯N hydrogen bonds. A C-H⋯π inter-action is also present.
    Preview · Article · Aug 2009 · Acta Crystallographica Section E Structure Reports Online
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    Lu-Ping Lv · Wei-Wei Li · Wen-Bo Yu · Tie-Ming Yu · Xian-Chao Hu
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    ABSTRACT: The molecule of the title compound, C10H12N2O4, adopts a trans configuration with respect to the C=N bond. The dihedral angle between the benzene ring and the methyl hydrazinecarboxylate plane is 3.01 (6)degrees. An intramolecular O-H center dot center dot center dot N hydrogen bond is observed. In the crystal, molecules are linked into a two-dimensional network parallel to (10 (1) over bar) by O-H center dot center dot center dot O, N-H center dot center dot center dot O and C-H center dot center dot center dot O hydrogen bonds.
    Preview · Article · Aug 2009 · Acta Crystallographica Section E Structure Reports Online
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    Lu-Ping Lv · Tie-Ming Yu · Wen-Bo Yu · Wei-Wei Li · Xian-Chao Hu
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    ABSTRACT: In the title mol-ecule, C(11)H(14)N(2)O(3), the acetohydrazide group is planar 0.084 (1) Å and forms a dihedral angle of 19.7 (1)° with the benzene ring. One of the meth-oxy groups is coplanar with the attached benzene ring within 0.052 (3) Å, whereas the other is slightly twisted [C-O-C-C = 6.3 (3)°]. The mol-ecule adopts a trans configuration with respect to the C=N bond. In the crystal, the mol-ecules are linked into chains along the a axis by N-H⋯O hydrogen bonds and the chains are cross-linked into a three-dimensional network by C-H⋯O hydrogen bonds.
    Preview · Article · Aug 2009 · Acta Crystallographica Section E Structure Reports Online
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    Lu-Ping Lv · Tie-Ming Yu · Wen-Bo Yu · Wei-Wei Li · Xian-Chao Hu
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    ABSTRACT: In the title mol-ecule, C(10)H(12)N(2)O(2), the acetohydrazide group is planar within 0.012 (1) Å and forms a dihedral angle of 5.25 (8)° with the benzene ring. The meth-oxy group is coplanar with the attached benzene ring [C-O-C-C = 0.1 (2)°]. The mol-ecule adopts a trans configuration with respect to the C=N double bond. In the crystal, mol-ecules are linked into centrosymmetric dimers by N-H⋯O hydrogen bonds and these dimers are linked into a ribbon-like structure along [110] by C-H⋯O hydrogen bonds. In addition, an inter-molecular C-H⋯π inter-action is observed.
    Preview · Article · Jul 2009 · Acta Crystallographica Section E Structure Reports Online
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    ABSTRACT: The asymmetric unit of the title compound, C(11)H(14)N(2)O(3), contains two independent mol-ecules with close conformations; the C=N-N-C torsion angle is 176.4 (1)° in both mol-ecules. In the crystal, inter-molecular N-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into chains running along the [01] direction.
    Preview · Article · Jul 2009 · Acta Crystallographica Section E Structure Reports Online
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    ABSTRACT: The title compound, C(10)H(12)N(2)O(4), adopts a trans configuration with respect to the C=N double bond. The non-H atoms of the mol-ecule are essentially coplanar, with a maximum deviation of 0.015 (2) Å. An intra-molecular O-H⋯N inter-action is observed. In the crystal structure, the mol-ecules are linked into a two-dimensional network parallel to the ac plane by N-H⋯O hydrogen bonds involving the meth-oxy O atom and by two C-H⋯O hydrogen bonds involving the carbonyl O atom. In addition, an intermolecular C-H⋯π inter-action is observed.
    Preview · Article · Jul 2009 · Acta Crystallographica Section E Structure Reports Online
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    Lu-Ping Lv · Wei-Wei Li · Tie-Ming Yu · Wen-Bo Yu · Xian-Chao Hu
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    ABSTRACT: In the title compound, C(8)H(10)N(2)O(3), the hydrazinecarboxyl-ate group is twisted from the furan ring by 6.98 (17)°. In the crystal, the mol-ecules are linked into one-dimensional chains running along the c axis by N-H⋯O hydrogen bonds.
    Preview · Article · Jul 2009 · Acta Crystallographica Section E Structure Reports Online
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    Lu-Ping Lv · Tie-Ming Yu · Wen-Bo Yu · Wei-Wei Li · Xian-Chao Hu
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    ABSTRACT: The title compound, C(10)H(12)N(2)O(4), adopts a trans configuration with respect to the C=N bond. The hydrazinecarboxylate group is twisted from the benzene ring by 6.62 (5)degrees and an intramolecular O-H center dot center dot center dot O hydrogen bond occurs. In the crystal structure, molecules are linked into a two-dimensional network parallel to (100) by O-H center dot center dot center dot O, N-H center dot center dot center dot O and C-H center dot center dot center dot O hydrogen bonds. In addition, weak C-H center dot center dot center dot pi interactions are observed.
    Preview · Article · Jun 2009 · Acta Crystallographica Section E Structure Reports Online
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    ABSTRACT: The title compound, C(10)H(12)N(2)O(3), crystallizes with two independent mol-ecules in the asymmetric unit. The side chains in the two independent mol-ecules have slightly different orientations, with the C=N-N-C torsion angle being 169.19 (14)° in one of the mol-ecules and -179.86 (14)° in the other. Each independent mol-ecule adopts a trans configuration with respect to the C=N bond. In the crystal structure, mol-ecules are linked into chains running along [001] by N-H⋯O, N-H⋯N and C-H⋯O hydrogen bonds. In addition, an inter-molecular C-H⋯π inter-action is observed.
    Preview · Article · May 2009 · Acta Crystallographica Section E Structure Reports Online
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    ABSTRACT: The molecule of the title compound, C(13)H(18)N(2)O(5), adopts a trans configuration with respect to the C=N bond. The dihedral angle between the benzene ring and the hydrazinecarboxylic acid plane is 49.75 (5)degrees and an intramolecular C-H center dot center dot center dot O interaction occurs. In the crystal structure, the molecules are linked into a chain along [010] by N-H center dot center dot center dot O hydrogen bonds, and a C-H center dot center dot center dot pi contact further stabilizes the structure.
    Preview · Article · Nov 2008 · Acta Crystallographica Section E Structure Reports Online
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    ABSTRACT: In the title compound, C(12)H(16)N(2)O(4)·H(2)O, the mol-ecular skeleton of the hydrazinecarboxyl-ate is nearly planar [within 0.053 (3) Å]. In the crystal, chains propagating along the c axis arise, composed of alternating hydrazinecarboxyl-ate mol-ecules and crystalline water, which inter-act via N-H⋯O and O-H⋯O hydrogen bonds.
    Preview · Article · Nov 2008 · Acta Crystallographica Section E Structure Reports Online
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    Jian-Wu Xie · Lu-Ping Lv · Wen-Bo Yu · Wei-Wei Li · Xian-Chao Hu
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    ABSTRACT: In the title compound, C2H7N2O2 +·Cl−·H2O, the non-H atoms of the cation are approximately coplanar. The organic cations, chloride ions and water mol­ecules are linked into a two-dimensional network parallel to the bc plane by N—H⋯O, N—H⋯Cl and O—H⋯Cl hydrogen bonds.
    Preview · Article · Nov 2008 · Acta Crystallographica Section E Structure Reports Online
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    ABSTRACT: The title compound, C(11)H(14)N(2)O(4), crystallizes with two independent but essentially identical mol-ecules in the asymmetric unit. Each mol-ecule adopts a trans configuration with respect to the C=N bond. Mol-ecules are linked into a one-dimensional network by inter- and intra-molecular N-H⋯O and C-H⋯O hydrogen bonds.
    Preview · Article · Nov 2008 · Acta Crystallographica Section E Structure Reports Online
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    Lu-Ping Lv · Jian-Wu Xie · Wen-Bo Yu · Wei-Wei Li · Xian-Chao Hu
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    ABSTRACT: The mol-ecule of the title compound, C(12)H(16)N(2)O(5), adopts a trans configuration with respect to the C=N double bond. The dihedral angle between the benzene and hydrazinecarboxylic acid methyl ester planes is 12.55 (7)°. The mol-ecules are linked into a chain along [001] by inter-molecular N-H⋯O hydrogen bonds, and the chains are cross-linked into a two-dimensional zigzag structure by C-H⋯O hydrogen bonds.
    Preview · Article · Nov 2008 · Acta Crystallographica Section E Structure Reports Online