Synthesis and diagnosis of a number of new super oxo compounds derived from Schiff base complexes for dual cobalt

El Mokhtar, Saad; Mahmoud, Tamador; Rashid, Lana

doi:10.33899/edusj.2013.163077

	Synthesis and diagnosis of a number of new super oxo compounds derived from Schiff base complexes for dual cobalt
Journal of Education and Science
Article 28, Volume 26, Issue 5, 2013, Pages 33-45 PDF (638.51 K)
Document Type: Research Paper
DOI: 10.33899/edusj.2013.163077
Authors
Saad El Mokhtar^* ; Tamador Mahmoud^* ; Lana Rashid^*
University of Mosul / College of Science / Department of Chemistry
Abstract
ABSTRACT: The work included the preparation of cobalt complexes having general formula [ CoL] , where L is divalent tetradentate Schiff base ligand derived from benzyl and anthranilic acid or o-aminophenol with 1:2 molar ratio . These complexes reacted with H₂O₂ in the absence and in the presence of B (B= py , -pic , Pph₃) at room temperature to obtain [ CoLO₂ ] and [CoLBO₂ ] complexes. All the prepared complexes were characterized by metal content analysis , molar conductance , spectral studies including I.R and electronic spectra as well as magnetic measurements. These studies revealed that all the complexes are non-electrolytes. The Schiff base ligands act as dibasic tetradentate ( NNOO-donor) , CoL complexes are square planar containing one unpaired electron. The electronic spectra reveals the oxidation of Co(II) to Co(III) in [CoLO₂] and [CoLBO₂] complexes. These complexes show μ_eff values related to one unpaired electron , that belongs to O₂ mioety , which is supported by (υ_o-o) band in I.R spectra that related to O₂ mioety. Hence superoxo compounds are realy recognized.
Keywords
synthesis; super oxo compounds; Schiff base complexes; dual cobalt

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