The title compound, [Cu2Cl4(C7H8N2O)2], crystallizes as discrete [CuLCl2]2 (L = 2-aminobenzamide) dimers with inversion symmetry. Each CuII ion is five-coordinated and is bound to two bridging chloride ligands, a terminal chloride ligand and a bidentate 2-aminobenzamide ligand. The crystal structure exhibits alternating layers parallel to (010) along the b-axis direction. In the crystal, the components are linked via N—H⋯Cl hydrogen bonds, forming a three-dimensional network. These interactions link the molecules within the layers and also link the layers together and reinforce the cohesion of the structure.
The title compound, C17H12N2O3, was synthesized by the reaction of 2-hydroxy-1-naphthaldehyde with 4-nitrobenzenamine. These condense to form the Schiff base, which crystallizes in the zwitterionic form. In the structure, the keto–amino tautomer has a fairly short intramolecular N—H⋯O hydrogen bond between the 2-naphthalenone and amino groups, with electron delocalization. The molecule is essentially planar, with a dihedral angle of 1.96 (3)° between the ring systems. In the crystal, the molecules are linked via intermolecular C—H⋯O hydrogen bonds, forming a layer parallel to (101).
In the title Schiff base salt, C16H13N2O+·ClO4
−, the pyridine ring and the naphthalene ring system are approximately co-planar [making a dihedral angle of 6.05 (12)°] and an intramolecular O—H⋯N hydrogen bond occurs between the hydroxyl and imino groups. In the crystal, the cations and anions are linked by N—H⋯O and weak C—H⋯O hydrogen bonds, forming the supramolecular layers parallel to (100). The crystal studied was an inversion twin refined with minor component = 0.43 (13).
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