Crystal structure of 13-phenyl-2,3,4,13-tetra-hydro-1H-indazolo1,2-bphthalazine-1,6,11-trione

• Published in: Acta crystallographica. Section E, Crystallographic communications Crystallographic communications, 2015-12, Vol.71 (Pt 12), p.o1036
• Main Authors: Lamera, Esma, Benzerka, Saida, Bouraiou, Abdelmalek, Bouacida, Sofiane, Merazig, Hocine, Chibani, Aissa, Le Borgne, Marc, Bouaziz, Zouhair
• Format: Article
• Language: English
• ISSN: 2056-9890; 2056-9890
• DOI: 10.1107/S2056989015023452

The title compound, C21H16N2O3, consists of an indazolone moiety, bearing a phenyl group, fused to a phthalazine ring system (r.m.s. deviation = 0.018 Å). The phenyl ring is almost normal to the mean plane of the five-membered ring of the indazolone moiety, making a dihedral angle of 89.64 (7)°. The six-membered ring of the indazolone moiety has an envelope conformation, with the central methyl-ene C atom as the flap. In the crystal, mol-ecules are linked via C-H⋯O hydrogen bonds, forming slabs parallel to the bc plane. The slabs are linked via C-H⋯π and π-π inter-actions [the shortest inter-centroid distance involving rings of pyrazolo-phthalazine moieties is 3.6430 (8) Å], forming a three-dimensional structure.The title compound, C21H16N2O3, consists of an indazolone moiety, bearing a phenyl group, fused to a phthalazine ring system (r.m.s. deviation = 0.018 Å). The phenyl ring is almost normal to the mean plane of the five-membered ring of the indazolone moiety, making a dihedral angle of 89.64 (7)°. The six-membered ring of the indazolone moiety has an envelope conformation, with the central methyl-ene C atom as the flap. In the crystal, mol-ecules are linked via C-H⋯O hydrogen bonds, forming slabs parallel to the bc plane. The slabs are linked via C-H⋯π and π-π inter-actions [the shortest inter-centroid distance involving rings of pyrazolo-phthalazine moieties is 3.6430 (8) Å], forming a three-dimensional structure.