title: Packing effects in 4,4'-bis(4-hydroxybutyl)-2,2'-bipyridine and 4,4'-bis(4-bromobutyl)-2,2'-bipyridine.
abstract: Structure analyses of 4,4'-bis(4-hydroxybutyl)-2,2'-bipyridine, C18H24N2O2, (I), and 4,4'-bis(4-bromobutyl)-2,2'-bipyridine, C18H22Br2N2, (II), reveal intermolecular hydrogen bonding in both compounds. For (I), O-H...N intermolecular hydrogen bonding leads to the formation of an infinite two-dimensional polymer, and pi stacking interactions are also observed. For (II), C-H...N intermolecular hydrogen bonding leads to the formation of a zigzag polymer. The two compounds crystallize in different crystal systems, but both molecules possess Ci symmetry, with one half molecule in the asymmetric unit.
authors.affiliation: Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland. vijaymahadevan.iyer@unifr.ch
authors.forename: Vijay Mahadevan
authors.initials: VM
authors.lastname: Iyer
authors.forename: Helen
authors.initials: H
authors.lastname: Stoeckli-Evans
authors.forename: Anthony
authors.initials: A
authors.lastname: D'Aléo
authors.forename: Luisa
authors.initials: L
authors.lastname: De Cola
authors.forename: Peter
authors.initials: P
authors.lastname: Belser