title: C-halogen...pi dimer and C-H...pi interactions in 1-(2-bromo-4,5-dimethoxybenzyl)-2-butyl-4-chloro-1H-imidazole-5-carbaldehyde and 2-butyl-4-chloro-1-(6-methyl-1,3-benzodioxol-5-ylmethyl)-1H-imidazole-5-carbaldehyde.
abstract: The structures of the title compounds, C17H20BrClN2O3, (I), and C17H19ClN2O3, (II), are stabilized by intramolecular C-H...O and C-H...pi interactions. The stability of the molecular packing in (I) and (II) arises from a diverse set of weak intermolecular C-H...O, C-H...pi and C-halogen...pi interactions. In the crystal structure of (I), molecules aggregate in dimeric subunits via C-Br...pi interactions. The dimers are interlinked by C-H...O hydrogen bonds. The halogens cluster together and form a channel along the b axis. In (II), the packing is mainly governed by intermolecular C-H...O and C-H...pi interactions.
authors.affiliation: Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysore 570 006, India.
authors.forename: B
authors.initials: B
authors.lastname: Nagaraj
authors.forename: T
authors.initials: T
authors.lastname: Narasimhamurthy
authors.forename: H S
authors.initials: HS
authors.lastname: Yathirajan
authors.forename: P
authors.initials: P
authors.lastname: Nagaraja
authors.forename: R S
authors.initials: RS
authors.lastname: Narasegowda
authors.forename: Ravindranath S
authors.initials: RS
authors.lastname: Rathore