alexa Abstract | Synthesis, spectral characterization and thermal analysis of some alloxan, carmine, naphthol yellow S and hematoxylin complexes

Journal of Chemical and Pharmaceutical Research
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Abstract

Syntheses of alloxan, carmine, naphthol yellow S and hematoxylin complexes have been reported. Elemental analysis of the prepared metal complexes, structural investigation of the complexes to know their geometries and mode of bonding based on: Infrared, electronic spectra and magnetic susceptibility, ESR study of copper complexes were studied. Some theoretical studies were carried out to obtain the charges, bond length, bond angles, and dihedral angles of the studied ligands, where the chemical potential, electronegativity, hardness and softness are determined, using hyperchem program. All the iron, cobalt and nickel complexes are with octahedral geometry, except Co-alloxan complex is with Td geometry. However, the copper and cadmium alloxan complexes are with square planner geometry. The thermal properties of the studied complexes were examined. Molecular modeling of the ligands was performed using PC computer to give extra spot lights on the bonding properties of these compounds.

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Author(s): Mamdouh S Masoud Rabah H A Mohamed Alaa E Alib and Najat O M ELZiani

Keywords

Alloxan, Carmine, Naphthol Yellow S, Hematoxylin, complexes, spectral investigation, thermal analysis., alloxan

 
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