title: Benzene-1,4-diboronic acid-4,4'-bipyridine-water (1/2/2).
abstract: In the presence of water, benzene-1,4-diboronic acid (1,4-bdba) and 4,4'-bipyridine (4,4'-bpy) form a cocrystal of composition (1,4-bdba)(4,4'-bpy)(2)(H(2)O)(2), in which the molecular components are organized in two, so far unknown, cyclophane-type hydrogen-bonding patterns. The asymmetric unit of the title compound, C(6)H(8)B(2)O(4).2C(10)H(8)N(2).2H(2)O, contains two 4,4'-bpy, two water molecules and two halves of 1,4-bdba molecules arranged around crystallographic inversion centers. The occurrence of O-H...O and O-H...N hydrogen bonds involving the water molecules and all O atoms of boronic acid gives rise to a two-dimensional hydrogen-bonded layer structure that develops parallel to the (01-4) plane. This supramolecular organization is reinforced by pi-pi interactions between symmetry-related 4,4'-bpy molecules.
authors.affiliation: Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, CP 62209, Cuernavaca, Mexico.
authors.forename: Araceli
authors.initials: A
authors.lastname: Vega
authors.forename: Maria
authors.initials: M
authors.lastname: Zarate
authors.forename: Hugo
authors.initials: H
authors.lastname: Tlahuext
authors.forename: Herbert
authors.initials: H
authors.lastname: Höpfl