title: Crystal structure of 2-(1,3-dioxoindan-2-yl)iso-quinoline-1,3,4-trione.
abstract: In the title iso-quinoline-1,3,4-trione derivative, C18H9NO5, the five-membered ring of the indane fragment adopts an envelope conformation with the nitro-gen-substituted C atom being the flap. The planes of the indane benzene ring and the iso-quinoline-1,3,4-trione ring make a dihedral angle of 82.06 (6)°. In the crystal, mol-ecules are linked into chains extending along the bc plane via C-H⋯O hydrogen-bonding inter-actions, enclosing R 2 (2)(8) and R 2 (2)(10) loops. The chains are further connected by π-π stacking inter-ations, with centroid-to-centroid distances of 3.9050 (7) Å, forming layers parallel to the b axis.
authors.affiliation: Department of Chemistry, Faculty of Sciences & Arts Khulais, King Abdulaziz University, Jeddah, KSA.
authors.forename: Raza Murad
authors.initials: RM
authors.lastname: Ghalib
authors.affiliation: X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia ; Department of Chemistry, Alva's Institute of Engineering & Technology, Mijar, Moodbidri 574 225, Karnataka, India.
authors.forename: C S
authors.initials: CS
authors.lastname: Chidan Kumar
authors.affiliation: School of Industrial Technology, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
authors.forename: Rokiah
authors.initials: R
authors.lastname: Hashim
authors.affiliation: School of Industrial Technology, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
authors.forename: Othman
authors.initials: O
authors.lastname: Sulaiman
authors.affiliation: Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, PO Box 2457, Riaydh 11451, Saudi Arabia ; X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun
keywords: crystal structure; hydrogen bonding; iso­quinoline-1,3,4-trione derivative; pharmacological properties; synthesis