Preparation of Zinc (II) and cadmium (II) complexes of the tetradentate Schiff base ligand 2-((E)-(2-(2-(pyridine-2-yl)- ethylthio)ethylimino)methyl)-4-bromophenol (PytBrsalH)

Molecules. 2008 Apr 8;13(4):804-11. doi: 10.3390/molecules13040804.

Abstract

We describe the synthesis and characterization of two new zinc (II) and cadmium (II) complexes of the tetradentate dissymmetric Schiff base ligand 2-((E)-(2-(2-(pyridine-2-yl)ethylthio)ethylimino)methyl)-4-bromophenol (PytBrsalH), prepared from 1-(2-pyridyl)-3-thia-5-aminopentane (pyta) and 5-bromosalicylaldehyde. The complexes were synthesized by treating an ethanolic solution of the ligand with equimolar amounts of appropriate metal salts in 1 M methanolic solution of NaOH or alternatively, by a more direct route in which the two reactants are added to a solution of the ligand immediately after formation of the latter and prior to any isolation. The complexes were characterized by elemental analysis, FTIR, (1)H-NMR, electronic spectra and molar conductivity. According to obtained data, the probable coordination geometries of zinc and cadmium in these complexes with mixed N, S and O donor atoms are tetrahedral- and octahedral-like,respectively. Both complexes were found to be 1:1 electrolyte systems in acetonitrile.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cadmium / chemistry*
  • Ligands
  • Phenols / chemical synthesis*
  • Phenols / chemistry
  • Pyridines / chemical synthesis*
  • Pyridines / chemistry
  • Schiff Bases / chemical synthesis*
  • Schiff Bases / chemistry*
  • Spectrum Analysis
  • Zinc / chemistry*

Substances

  • 2-((E)-(2-(2-(pyridine-2-yl)- ethylthio)ethylimino)methyl)-4-bromophenol
  • Ligands
  • Phenols
  • Pyridines
  • Schiff Bases
  • Cadmium
  • Zinc