title: Crystal structure of 3-(2,2-di-bromo-acet-yl)-4-hy-droxy-2H-chromen-2-one.
abstract: The title compound, C11H6Br2O4, is a new coumarin derivative obtained from the reaction of 3-acetyl-4-hy-droxy-2H-chromen-2-one with bromine in acetic acid. The hy-droxyl group in involved in an intra-molecular O-H⋯O hydrogen bond. In the crystal, π-π inter-actions between the rings of the bicycle [inter-centroid distances = 3.498 (2) and 3.539 (2) Å] pack mol-ecules into stacks along the b axis, and weak inter-molecular C-H⋯O hydrogen bonds further link these stacks into layers parallel to the ab plane.
authors: Unité de Chimie des Matériaux et de l'Environnement UR11ES25, ISSBAT, Université de Tunis-El Manar, 9, Avenue Dr. Zoheir SAFI, 1006 Tunis, Tunisia.
authors: Ameni
authors: A
authors: Brahmia
authors: Unité de Chimie des Matériaux et de l'Environnement UR11ES25, ISSBAT, Université de Tunis-El Manar, 9, Avenue Dr. Zoheir SAFI, 1006 Tunis, Tunisia.
authors: Afef
authors: A
authors: Ghouili
authors: Unité de Chimie des Matériaux et de l'Environnement UR11ES25, ISSBAT, Université de Tunis-El Manar, 9, Avenue Dr. Zoheir SAFI, 1006 Tunis, Tunisia.
authors: Rached
authors: R
authors: Ben Hassen
keywords: coumarin derivatives; crystal structure; dibromation; hydrogen bonding; π–π inter­actions