title: Crystal structure of catena-poly[[[trans-bis(aceto-nitrile-κN)diaquacobalt(II)]-μ-pyrazine-κ(2) N:N'] dinitrate].
abstract: The central structural motif of the title coordination polymer, [Co(NO3)2(C4H4N2)(CH3CN)2(H2O)2] n , is a chain composed of Co(II) ions linked by bis-monodentate bridging pyrazine ligands through their N atoms. The Co(II) ion is located on an inversion center and is additionally coordinated by two O atoms of water mol-ecules and two N atoms of aceto-nitrile mol-ecules. The resultant N4O2 coordination sphere is distorted octa-hedral. The linear cationic chains extend parallel to the a axis and are aligned into layers parallel to the ac plane. Nitrate anions are situated in the space between the Co(II) chains and form O-H⋯O hydrogen bonds with the coordinating water mol-ecules, leading to a three-dimensional network structure. Weak C-H⋯O hydrogen bonds are also present between pyrazine or aceto-nitrile mol-ecules and the nitrate anions.
authors.affiliation: Department of Chemistry and Environmental Science, Grenfell Campus, Memorial University of Newfoundland, Corner Brook, NL, A2H 5G4, Canada.
authors.forename: Chen
authors.initials: C
authors.lastname: Liu
authors.affiliation: Department of Chemistry, University of Florida, Gainesville, FL, 32611-7200, USA.
authors.forename: Ashley C
authors.initials: AC
authors.lastname: Felts
authors.affiliation: Department of Chemistry, University of Florida, Gainesville, FL, 32611-7200, USA.
authors.forename: Annaliese E
authors.initials: AE
authors.lastname: Thuijs
authors.affiliation: Department of Chemistry and Environmental Science, Grenfell Campus, Memorial University of Newfoundland, Corner Brook, NL, A2H 5G4, Canada.
authors.forename: Aaron
authors.initials: A
authors.lastname: Useche
authors.affiliation: Department of Chemistry, University of Florida, Gainesville, FL, 32611-7200, USA.
authors.forename: Khalil A
authors.initials: KA
authors.lastname: Abboud
keywords: aceto­nitrile ligand; cobalt(II) complex; crystal structure; one dimensional coordination polymer; pyrazine ligand