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(E)-N'-(4-Nitro-benzyl-idene)-4-(8-quinol-yloxy)butano-hydrazide.

ABSTRACT: In the title compound, C(20)H(18)N(4)O(4), conformation along the bond sequence linking the benzene and quinoline rings, which have a mean inter-planar dihedral angle of 2.7 (5)°, is trans-(+)gauche-trans-trans-(-)gauche-trans-trans. In the crystal structure, a pair of inter-molecular N-H⋯O hydrogen bonds links the mol-ecules into centrosymmetric cyclic R(2) (2)(8) dimers, which are aggregated via π-π inter-actions into parallel sheets [quinoline-benzene ring centroid separation = 3.6173 (16)-3.6511 (16) Å]. The sheets are further connected through weak C-H⋯O inter-actions, giving a supra-molecular two-dimensional network.

SUBMITTER: Xiahou GL

PROVIDER: S-EPMC3007085 | biostudies-literature | 2010 Jun

REPOSITORIES: biostudies-literature

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(E)-N'-(4-Nitro-benzyl-idene)-4-(8-quinol-yloxy)butano-hydrazide.

Xiahou Guo-Lun GL Ding Ye-Chun YC Fan Xiao-Na XN

Acta crystallographica. Section E, Structure reports online 20100605 Pt 7

In the title compound, C(20)H(18)N(4)O(4), conformation along the bond sequence linking the benzene and quinoline rings, which have a mean inter-planar dihedral angle of 2.7 (5)°, is trans-(+)gauche-trans-trans-(-)gauche-trans-trans. In the crystal structure, a pair of inter-molecular N-H⋯O hydrogen bonds links the mol-ecules into centrosymmetric cyclic R(2) (2)(8) dimers, which are aggregated via π-π inter-actions into parallel sheets [quinoline-benzene ring centroid separation = 3.6173 (16)-3. ...[more]

PMID: 21587772

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(E)-N'-(3-Nitro-benzyl-idene)-4-(8-quinol-yloxy)butano-hydrazide.

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(E)-N'-(2,5-Dimethoxy-benzyl-idene)-2-(8-quinol-yloxy)acetohydrazide methanol solvate.

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Project description:The crystal of the title Schiff base compound, C(20)H(18)ClN(3)O(3)·H(2)O, was twinned by a twofold rotation about (100). The asymmetric unit contains two crystallographically independent mol-ecules with similar conformations, and two water mol-ecules. The C=N-N angles of 115.7 (6) and 116.2 (6)° are significantly smaller than the ideal value of 120° expected for sp(2)-hybridized N atoms and the dihedral angles between the benzene ring and quinoline ring system in the two mol-ecules are 52.5 (7) and 53.9 (7)°. The mol-ecules aggregate via C-Cl⋯π and π-π inter-actions [centroid-centroid distances = 3.696 (5)-3.892 (5) Å] and weak C-H⋯O inter-actions as parallel sheets, which are further linked by water mol-ecules through N-H⋯O and O-H⋯O hydrogen bonds into a supra-molecular two-dimensional network.

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