title: 1-Allyl-1H-1,3-benzimidazol-2(3H)-one.
abstract: The fused five- and six-membered rings in the title compound, C(10)H(10)N(2)O, are approximately coplanar, with an r.m.s. deviation of 0.008 Å. The mean plane of the allyl group is roughly perpendicular to the mean plane of the 1,3-benzimidazol-2(3H)-one system, making a dihedral angle of 86.1 (2)°. In the crystal, each mol-ecule is linked to its symmetry equivalent partner by a pair of N-H⋯O and C-H⋯O hydrogen bonds.
authors.affiliation: Laboratoire de Chimie Organique Appliquée, Université Sidi Mohamed Ben Abdallah, Faculté des Sciences et Techniques, Route d'immouzzer, BP 2202 Fès,  Morocco.
authors.forename: Dounia
authors.initials: D
authors.lastname: Belaziz
authors.forename: Youssef
authors.initials: Y
authors.lastname: Kandri Rodi
authors.forename: Fouad
authors.initials: F
authors.lastname: Ouazzani Chahdi
authors.forename: El Mokhtar
authors.initials: el M
authors.lastname: Essassi
authors.forename: Mohamed
authors.initials: M
authors.lastname: Saadi
authors.forename: Lahcen
authors.initials: L
authors.lastname: El Ammari