A novel trinuclear cobalt(II) complex derived from an asymmetric Salamo-type N2O3 bisoxime chelate ligand: synthesis, structure and optical properties

Spectrochim Acta A Mol Biomol Spectrosc. 2014 Dec 10:133:340-7. doi: 10.1016/j.saa.2014.04.190. Epub 2014 May 16.

Abstract

A novel trinuclear Co(II) complex, {[CoL(PrOH)]2Co(H2O)}·PrOH, has been synthesized with 6-ethoxy-6'-hydroxy-2,2'-[ethylenedioxybis(nitrilomethylidyne)]diphenol (H3L), and characterized by elemental analyses, FT-IR, UV-Vis, molar conductance and X-ray crystallographic analysis. Two n-propanol molecules and one water molecule coordinate to three Co(II) ions and four μ-phenoxo oxygen atoms from two [CoL(CH3CH2CH2OH)] units also coordinating to Co(II) ion. All the penta-coordinated Co(II) ions of the Co(II) complex have a slightly distorted trigonal bipyramidal coordinated polyhedron. Meanwhile, the μ-phenoxo bridges play important roles in assembling Co(II) ions and L(3-) units, which is different from the normal trinuclear Co(II) complexes with the Salamo-type ligands reported early.

Keywords: Asymmetric Salamo-type ligand; Co(II) complex; Crystal structure; Optical property; Synthesis.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cobalt / chemistry*
  • Coordination Complexes / chemical synthesis
  • Coordination Complexes / chemistry*
  • Crystallography, X-Ray
  • Ligands
  • Models, Molecular
  • Nitrogen Oxides / chemical synthesis
  • Nitrogen Oxides / chemistry*
  • Oximes / chemical synthesis
  • Oximes / chemistry*

Substances

  • Coordination Complexes
  • Ligands
  • Nitrogen Oxides
  • Oximes
  • Cobalt