title: Crystal structure of 4-bromo-phenyl-2-oxo-2H-chromene-3-carboxyl-ate.
abstract: In the title compound, C16H9BrO4, the coumarin ring system is approximately planar, with an r.m.s deviation of the ten fitted non-H atoms of 0.031 Å, and forms a dihedral angle of 25.85 (10)° with the bromo-benzene ring. The carbonyl atoms are syn. In the crystal, mol-ecules are connected along [001] via C-H⋯O inter-actions, forming C(6) chains. Neighbouring C(6) chains are connected via several π-π inter-actions [range of centroid-centroid distances = 3.7254 (15)-3.7716 (16) Å], leading to sheets propagating in the bc plane.
authors.affiliation: Department of Physics, Yuvaraja's College (Constituent College), University of Mysore, Mysore, Karnataka 570 005, India.
authors.forename: H C
authors.initials: HC
authors.lastname: Devarajegowda
authors.affiliation: Department of Studies and Research in Chemistry, U.C.S., Tumkur University, Tumkur, Karnataka 572 103, India.
authors.forename: P A
authors.initials: PA
authors.lastname: Suchetan
authors.affiliation: Raman Research Institute, C. V. Raman Avenue, Sadashivanagar, Bangalore, Karnataka 560080, India.
authors.forename: H T
authors.initials: HT
authors.lastname: Srinivasa
authors.affiliation: Department of Studies and Research in Chemistry, Tumkur University, Tumkur, Karnataka 572 103, India.
authors.forename: S
authors.initials: S
authors.lastname: Sreenivasa
authors.affiliation: Department of Physics, Yuvaraja's College (Constituent College), University of Mysore, Mysore, Karnataka 570 005, India.
authors.forename: B S
authors.initials: BS
authors.lastname: Palakshamurthy
keywords: 2-oxo-2H-chromene; crystal structure; hydrogen bonding; π–π inter­actions