Crystal structure and Hirshfeld surface analysis of 1-[( E )-2-(3-nitro-phen-yl)diazen-1-yl]naphthalen-2-ol

• Published in: Acta crystallographica. Section E, Crystallographic communications Vol. 79; no. Pt 3; pp. 142 - 145
• Main Authors: Benaouida, Mohamed Amine, Benosmane, Ali, Boutebdja, Mehdi, Merazig, Hocine
• Format: Journal Article
• Language: English
• Published: England International Union of Crystallography 01-03-2023
• Subjects: azo dyes; crystal structure; hirshfeld surface; intermolecular interactions; Research Communications; x-ray diffraction; X-ray diffraction; crystal structure; inter­molecular inter­actions; azo dyes; Hirshfeld surface
• ISSN: 2056-9890; 2056-9890
• DOI: 10.1107/S2056989023001068

The title compound, C
H
N
O
, belongs to the family of azo dyes. In the light of a single-crystal X-ray study, it is evident that of the tautomeric forms (azo-hydrazone), the hydrazone form is the predominant form in the solid state, namely, (1
)-1-[2-(3-nitro-phen-yl)hydrazin-1-yl-idene]-1,2-di-hydro-naphthalen-2-one. The naphthol and benzene fragments attached to the -N=N- moiety adopt the
conformation. Furthermore, the mol-ecules are nearly coplanar, subtending a dihedral angle of 2.63 (5)°. An intra-molecular N-H⋯O hydrogen bond occurs. There are only two types of inter-molecular inter-actions in the crystal structure: strong hydrogen-bonding C-H⋯O inter-actions and π-π stacking inter-actions. The importance of C-H⋯O inter-actions in the mol-ecular packing is reflected by the relatively high contributions (28.5%) made by O⋯H/H⋯O contacts to the Hirshfeld surface.