PHYSICOCHEMICAL STUDIES OF MANGANESE (II) AND COPPER (II) COMPLEXES AND THEIR ADDUCT

  • H. O. Omoregie Department of Chemistry, Faculty of Science, University of Ibadan, Nigeria
  • D. T. Ibukun Department of Chemistry, Faculty of Science, University of Ibadan, Nigeria
  • A. J. Omojola Department of Chemistry, Faculty of Science, University of Ibadan, Nigeria
Keywords: Salicylaldehyde, 4,4,4-trifluoro-1-(2-Naphthyl)-1, 3-butanedione, Magnetochemistry, antimicrobial activity

Abstract

 Bis(salicylaldehydato) manganese (II) and Bis(4,4,4-trifluoro-1-(2-Naphthyl)-1,3-butanedionato) copper(II),  their 2,2'-bipyridine, ethylenediamine, 1,10-phenanthroline and tetramethylethylenediamine adducts have been synthesized and characterized by metal analysis, FT-IR, UV–Visible, magnetic susceptibility and antimicrobial activity. The complexes and adducts were obtained as brown, yellow or light green colour. The metal analyses were in close agreement with the theoretical values expected. The infrared spectra of the manganese(II) complex revealed the coordination of salicylaldehyde through the carbonyl group and the hydroxyl group, while 2,2'-bipyridine, ethylenediamine, 1,10-phenanthroline and tetramethylethylenediamine coordinated to the metal through the nitrogen atoms. The magnetic moment data suggests low-spin octahedral geometry for [Mn(sal)2(H2O)2] (μeff = 2.14 B.M), high-spin octahedral geometries for [Mn(sal)2(en)].5H2O (μeff = 5.50 B.M), [Mn(sal)2(phen)] (μeff = 6.2 B.M),[Mn(sal)2bipy](μeff =5.95 B.M)  and [Mn(sal)2(tmen)](μeff =5.98 B.M.). The electronic measurements are indicative of a probable four-coordinate square planar geometry for [Cu(tfnb)2] while five-coordinate square pyramidal geometry are proposed for the copper(II) adducts. The complexes and adducts were screened against various bacteria and fungi. The copper complex and adducts were moderately active against fungal strain except [Cu(tfnb)2] and [Cu(tfnb)2en] in Aspergillus niger which showed pronounced activity and resistance respectively

Published
2021-04-07
How to Cite
Omoregie, H., Ibukun, D., & Omojola, A. (2021). PHYSICOCHEMICAL STUDIES OF MANGANESE (II) AND COPPER (II) COMPLEXES AND THEIR ADDUCT. LAUTECH Journal of Engineering and Technology, 15(2), 139-148. Retrieved from https://laujet.com/index.php/laujet/article/view/521