title: {4-[(Carbamimidoylhydrazono)methyl-kappa2N1,N4]-5-hydroxymethyl-2-methylpyridinium-3-olate-kappaO}(methanol-kappaO)copper(II) dinitrate.
abstract: The title compound, [Cu(C(9)H(13)N(5)O(2))(CH(4)O)](NO(3))(2), consists of square-planar cationic complex units where the Cu(II) centre is coordinated by an N,N',O-tridentate pyridoxal-aminoguanidine Schiff base adduct and a methanol molecule. The tridentate ligand is a zwitterion exhibiting an almost planar conformation. The dihedral angles between the mean planes of the pyridoxal ring and the six- and five-membered chelate rings are all less than 2.0 degrees. The charge on the complex cation is neutralized by two nitrate counter-ions. Extensive N-H...O and C-H...O hydrogen bonding connects these ionic species and leads to the formation of layers. The pyridoxal hydroxy groups are the only fragments that deviate significantly from the flat layer structure; these groups are involved in O-H...O hydrogen bonding, connecting the layers into a three-dimensional crystal structure.
authors.affiliation: Department of Chemistry, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia.
authors.forename: Vukadin M
authors.initials: VM
authors.lastname: Leovac
authors.forename: Ljiljana S
authors.initials: LS
authors.lastname: Vojinović-Jesić
authors.forename: Valerija I
authors.initials: VI
authors.lastname: Cesljević
authors.forename: Sladjana B
authors.initials: SB
authors.lastname: Novaković
authors.forename: Goran A
authors.initials: GA
authors.lastname: Bogdanović
mesh_terms: D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000737:chemistry*; D012545:Schiff Bases / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D012545:Schiff Bases; D003300:Copper