The C-3 substituted phenylazo derivatives of lawsone (2-hydroxy-l,4 p-naphthoquinone, III) were synthesized and characterized. The X-ray crystal structure was determined for the ligand 3-(3'-methyl phenylazo) lawsone. The copper complexes of these derivatives were found to possess 1:2 metal stoichiometry and square planar geometries with intermolecular stackings, resulting in antiferromagnetic ...

The title compound, C(18)H(15)NO, is a Schiff base prepared from an acid-catalyzed condensation reaction between 1-naphthaldehyde and 6-amino-m-cresol. Intra-molecular hydrogen bonding occurs via an O-H⋯N inter-action, generating an S(5) ring motif. Neighboring phenol groups participate in inter-molecular hydrogen bonding through an O-H⋯O inter-action, forming chains. The O atom of the phenol g...

In the title compound, C(15)H(11)NS, the dihedral angle between the thio-phene and 1-naphthyl rings is 31.42 (11)°. The mol-ecule adopts a trans configuration about the central C=N bond. In the crystal, the mol-ecules are connected via weak C-H⋯π inter-actions.

In the title compound, C(24)H(16)O(2), the naphthalene ring system makes dihedral angles of 78.5 (6) and 65.5 (7)° with the terminal and central benzene rings, respectively. The dihedral angle between the benzene rings is 74.5 (8)°. In the crystal, neighbouring molecules are interlinked through two C-H⋯π interactions, which construct a two-dimensional supramolecular framework extending infinite...

There are two independent zwitterion mol-ecules (A and B) in the asymmetric unit of the title compound, C17H11N3O, which belongs to the family of azo dyes. The dihedral angle between the benzene ring and the naphthalene ring system is 6.99 (6)° in mol-ecule A and 4.38 (6)° in mol-ecule B. The azo group adopts an E conformation with respect to the -N=N- bond and each of the independent mol-ecule...