Synthesis, characterization, spectroscopic and crystallographic investigation of Cobalt(III) schiff base complex with two perpendicular diamine coumarin ligands

New transition metal complex of Cobalt(III) of the ligand (E)-3-(1-(2-aminoethylimino)ethyl)-4-hydroxy-2H-chromen-2-one, derived from condensation of ethylene diamine with 3-acetyl-4-hydroxy-chromene-2-one have been synthesized by reaction of cobalt(III) salt and the ligand, in amounts equal to meta...

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Bibliographic Details
Published in:Open journal of inorganic chemistry 2012-04, Vol.2 (2), p.33-39
Main Authors: Ketata, Imen, Mechi, Lassad, Ayed, Taicir Ben, Dusek, Michal, Petricek, Vaclav, Hassen, RachedBen
Format: Article
Language:English
Subjects:
Anions
Cations
Diamines
Diffraction
Ethylene
Ligands
Schiff bases
Solvents
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Summary:New transition metal complex of Cobalt(III) of the ligand (E)-3-(1-(2-aminoethylimino)ethyl)-4-hydroxy-2H-chromen-2-one, derived from condensation of ethylene diamine with 3-acetyl-4-hydroxy-chromene-2-one have been synthesized by reaction of cobalt(III) salt and the ligand, in amounts equal to metal-ligand molar ratio of 1:2. Both the Schiff base and the complex of Co(III) were characterized by IR, UV-Vis, 1H NMR- and 13C NMR-spectroscopy techniques. Single crystal X-ray diffraction investigation, at low temperature T = 120 K, shows that the cobalt complex is triclinic P-1, a = 10.426(5) Aa, b = 11.3234(2) Aa, c = 15.729(5) Aa, alpha ( degree ) = 70.102(4), beta ( degree ) = 86.049(4), gamma ( degree ) = 82.497(4), Z = 2, and its structure consists of isolated [Co(III)(C13H13N2O3)2]+ complex cations with distorted octahedral geometry, ClO-4 counter anions, acetone solvent and water molecules. The crystal cohesion is stabilized by hydrogen bonds between ligands and water molecules, and ionic interactions between complex cations and counter anions.
ISSN:2161-7406
2161-7414
DOI:10.4236/ojic.2012.22006