metal-organic compounds
Open access
The CuII atom in the title compound, [Cu(C16H10ClN2O)2], is located on an inversion center and is tetracoordinated by two N and two O atoms from two bidentate 1-[(E)-(2-chlorophenyl)diazenyl]naphthalen-2-olate ligands, forming a square-planar complex. In the crystal, molecules are linked via weak C—HO and C—HCl hydrogen bonds, forming chains propagating along [010]. There are also π–π interactions present involving adjacent naphthalene rings [centroid–centroid distance = 3.661 (13) Å].
organic compounds
Open access
The title zwitterion,, C16H11ClN2O, is approximately planar, the dihedral angle between the benzene ring and naphthalene ring system is 1.55 (13)°; an intramolecular N—HO hydrogen bond stabilizes the planar conformation. In the crystal, π–π stacking between the benzene ring and the naphthalene ring system of adjacent molecules links the molecules into supramolecular chains running along the b axis, the centroid–centroid distance being 3.765 (2) Å.