title: Bis{bis-(azido-κN)bis-[bis-(pyridin-2-yl-κN)amine]cobalt(III)} sulfate dihydrate.
abstract: The search for new mol-ecular materials with inter-esting magnetic properties, using the pseudohalide azide ion and di-2-pyridyl-amine (dpa, C10H9N3) as a chelating ligand, led to the synthesis and structure determination of the title compound, [Co(N3)2(dpa)2]2SO4·2H2O. The crystal structure comprises discrete [Co(dpa)2(N3)2](+) cations, sulfate anions, as well as H2O solvent mol-ecules. The Co(III) cations display a slightly distorted octa-hedral coordination sphere defined by two N atoms from azide anions and four N atoms from the pyridyl rings of two dpa ligands. In the crystal, extensive C-H⋯O, N-H⋯O, and O-H⋯O inter-actions result in supra-molecular sheets that lie parallel to the ab plane. The sheets are further linked through O-H⋯N inter-actions between the water mol-ecules of one sheet and azide anions of another sheet, forming a supra-molecular framework.
authors.affiliation: Laboratoire de Chimie, Ingénierie Moléculaire et Nanostructures (LCIMN), Université Ferhat Abbas Sétif 1, Sétif 19000, Algeria.
authors.forename: Fatima
authors.initials: F
authors.lastname: Setifi
authors.affiliation: Department of Chemistry, Mathematics and Physics, Clarion University, 840 Wood Street, Clarion, PA 16214, USA.
authors.forename: Jacqueline M
authors.initials: JM
authors.lastname: Knaust
authors.affiliation: Laboratoire de Chimie, Ingénierie Moléculaire et Nanostructures (LCIMN), Université Ferhat Abbas Sétif 1, Sétif 19000, Algeria.
authors.forename: Zouaoui
authors.initials: Z
authors.lastname: Setifi
authors.affiliation: Laboratoire de Chimie Appliquée et Environnement, LCAE-URAC18, COSTE, Faculté des Sciences, Université Mohamed Premier, BP524, 60000, Oujda, Morocco, and, Faculté Pluridisciplinaire Nador BP 300, Selouane, 62702, Nador, Morocco.
authors.forename: Rachid
authors.initials: R
authors.lastname: Touzani
keywords: CoIII complex; azide; coordination compound; crystal structure; di-2-pyridyl­amine (dpa); hydrogen bonding; supra­molecular structure