(1Z)-Phthalazin-1(2H)-One Isopropyl-idenehydrazone

Abstract

The crystal structure of the title compound, C11H12N4, is stabilized by an N - H⋯N and three C - H⋯N inter-molecular hydrogen bonds. The N - H⋯N hydrogen bonds generate centrosymmetric R 2 2(6) rings, while the three C - H⋯N hydrogen bonds forms edge-fused R 2 2(7)R 2 2(7)R 2 2(10) ring motifs. Except for four H atoms of the methyl groups, all atoms are in the same plane and the dihedral angles between the aromatic and heterocyclic rings and the substituent group plane are 1.87 (5) and 1.53 (5)°, respectively. © International Union of Crystallography 2007.