A mononuclear, mixed (salicylato) (nicotinamide) complex of Zn(II) with penta- and hexa-coordination sites: a novel framework structure

KÖSE D. A., AY A. N., Sahin O., Buyukgungor O.

JOURNAL OF THE IRANIAN CHEMICAL SOCIETY, vol.9, no.4, pp.591-597, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 9 Issue: 4
  • Publication Date: 2012
  • Doi Number: 10.1007/s13738-012-0072-9
  • Journal Name: JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.591-597
  • Keywords: Zn(II) complexes, Mixed-ligand complexes, Salicylic acid complexes, Nicotinamide complexes, Penta-coordinated Zn(II), Hexa-coordinated Zn(II), HYDROXYBENZOATE COMPLEXES, CRYSTAL-STRUCTURE, ZINC, CU(II), NI(II), LIGANDS, CO(II)
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

The title compound, diaqua(bissalicylato-kappa O)(bisnicotinamide-kappa N)zinc(II)][bis(triaqua (monosalicylato-kappa O)(mononicotinamide-kappa N)zinc(II)salicylate, includes three Zn(II) ions, four nicotinamide ligands, six salicylate ligands and eight coordinated aqua ligands in the asymmetric unit in complex structure. The geometry around one of the Zn(II) ions is a slightly distorted octahedron, of which the equatorial plane is formed by two carboxylate oxygens and two aqua oxygens, while the axial positions are occupied by two pyridyl nitrogen atoms. The other Zn(II) ions adopt fivefold coordinations with one carboxylate oxygen atom from salicylate ligand, one N atom from nicotinamide ligand and three oxygen atoms from aqua ligands. In addition, there are two salicylate anions in the unit cell that are not coordinated. They provide charge balance as counter-ions in the complex framework.