Some new Schiff base complexes and their reaction with hydrogen peroxide

Abstract EN

A number of new complexes were prepared by the reaction, in both neutral and basic media, of cobalt (II), nickel(II) salts with Schiff base ligands.

These ligands derived from the condensation of 2- furfuraldehyde with benzoyl hydrazine (FBH) and salicyloyl hydrazine (FSH2).

The isolated complexes which have the general formula [M(FBH)Cl232JM(FBH)X| X , fM(FB)X(H20)] 2, [M(FSH2)X2] and [M(FS)(H20)3] (where M=Co", Ni2+, Cu2f and X = Cl or N03) have been characterized by elemental analysis, conductivity measurement, infrared, electronic absorption spectra and magnetic moments.

The study indicates 1:1 metal to ligand ratio, non electrolytic nature, the presence of anionic bridges and an octahedral geometiy for all die complexes.

The stability constants and the reation with hydrogen peroxide for some of these complexes were followed spcclrophotometerically.

Hydrogen peroxide is reacted with the new complexes and found to proceed through a complex- radical formation (formation of superoxo species).

Cobalt (III) supcroxompound, fCo(FS)(H20)02] was isolated in the solid slate and identified by magnetic moment, infrared and electronic absorption spectra.