The title compound, 2C(16)H(13)N(3)O(4)·C(18)H(14)N(4)·2CH(4)O, was crystallized from the reaction between 3,4,5-trihydroxy-benzoyl-hydrazine and indole-2-carbaldehyde in a mixture of ethanol and methanol. The compound is a stoichiometric 2:1 cocrystal of the methanol-solvated reaction product, 3,4,5-trihydr-oxy-N'-(1H-indol-2-ylmethyl-idene)benzohydrazide and 1H-indole-2-carbaldehyde azine that arose unexpectedly during the synthesis. The former mol-ecules are linked by O-H⋯O hydrogen bonds and also by π-π stacking inter-actions between benzoyl-hydrazide rings into a two-dimensional network. The methanol solvent mol-ecules are hydrogen bonded to this network. The centrosymmetric azine mol-ecules are not engaged in hydrogen bonding.
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[Show abstract][Hide abstract] ABSTRACT: The title compound, C(14)H(11)N(3)O(4), was prepared by the reaction of 3-nitro-benzohydrazide with 3-hy-droxy-benzalde-hyde. The mol-ecule adopts an E configuration about the C=N bond. The dihedral angle between the two benzene rings is 32.3 (2)°. In the crystal, the mol-ecules are linked through inter-molecular N-H⋯O, O-H⋯N, and O-H⋯O hydrogen bonds, forming chains in the a-axis direction.
[Show abstract][Hide abstract] ABSTRACT: In the title compound, C(14)H(9)Cl(2)N(3)O(4)·CH(4)O, the dihedral angle between the two benzene rings in the hydrazone mol-ecule is 6.3 (3)°. An intra-molecular N-H⋯O hydrogen bond stabilizes the mol-ecular conformation. In the crystal, centrosymmetrically related mol-ecules are linked through inter-molecular O-H⋯O and N-H⋯O hydrogen bonds.
[Show abstract][Hide abstract] ABSTRACT: The title mol-ecule, C(14)H(11)N(3)O(4), is approximately planar, with an inter-planar angle between the two benzene rings of 5.8 (2)°. In the crystal, four mol-ecules are linked by an R(4) (4)(12) motif with pairs of strong O-H⋯O and N-H⋯O hydrogen bonds. The motif is situated about the crystallographic centres of symmetry and it is composed of two pairs of parallel mol-ecules. This quadruplet of mol-ecules is further extended by symmetry-equivalent hydrogen bonds to form layers parallel to the (10) plane. In addition to the hydrogen bonds, there is also a weak π-π inter-action between the benzene rings.