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In the title molecule, C18H17N5O2, the dihedral angle between the benzene plane and the benzimidazole plane is 19.8 (1)° and the angle between the benzene plane and the triazole plane is 16.7 (1)°. In the crystal, mol­ecules are connected by O—H...N hydrogen bonds, forming zigzag chains along the c-axis direction. The chains are connected by bifurcated N—H...(N,N) hydrogen bonds into layers parallel to (100). These layers are connected along the a-axis direction by weak C—H...O contacts, forming a three-dimensional network.

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In the mol­ecule of the title compound, C15H12ClNO3, the chloro­benzamide and benzoate units are almost co-planar, with a dihedral angle between the six-membered rings of 2.99 (10)°. An intra­molecular N—H...O hydrogen bond occurs. In the crystal, each mol­ecule is linked to a symmetry-equivalent counterpart across a twofold rotation axis by weak C—H...O and C—H...Cl hydrogen bonds, forming dimers. The packing is stabilized through weak π–π stacking along the b-axis direction, leading to π-stacked columns of inversion-related mol­ecules, with an inter­planar distance of 3.46 (2) Å and a centroid–centroid vector of 3.897 (2) Å.
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