Crystal structure of 13-(2-methoxyphenyl)-3,4-dihydro-2H-indazolo[1,2-b]phthalazine-1,6,11(13H)-trione

• Main Authors: Abdelmalek Bouraiou, Sofiane Bouacida, Hocine Merazig, Aissa Chibani, Zouhair Bouaziz
• Format: Article
• Language: English
• Published: International Union of Crystallography 2015-08-01
• Series: Acta Crystallographica Section E: Crystallographic Communications
• Subjects: crystal structure; phthalazine; indazole; C—H...O hydrogen bonds; C—H...π interactions; π–π interactions
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S2056989015013894

In the title compound, C22H18N2O4, the three fused rings of the pyrazolophthalazine moiety are coplanar (r.m.s. deviation = 0.027 Å). The cyclohexene ring fused to the pyrazolidine ring, so forming the indazolophthalazine unit, has a half-chair conformation. The benzene ring is almost normal to the mean plane of the pyrazolophthalazine moiety, with a dihedral angle of 87.21 (6)° between their planes. In the crystal, molecules are linked by pairs of C—H...O hydrogen bonds forming inversion dimers. The dimers are linked via C—H...π interactions, forming slabs parallel to (100). Between the slabs there are weak π–π interactions [shortest inter-centroid distance = 3.6664 (9) Å], leading to the formation of a three-dimensional structure.