SYNTHESIS AND SPECTROSCOPIC STUDIES OF MANGANESE(II),COBALT(II), NICKEL(II), COPPER(II), ZINC(II) AND CADMIUM(II)COMPLEXES WITH SCHIFF BASE DERIVED FROM 1,2-DIPHENYL-3-METHYL-4-AMINO-5-OXO-PYRAZOLE WITH BENZALDEHYDE

Abstract

The synthesis and characterization of new complexes of Mn(II), Co(II), Ni(II),
Cu(II) ,Zn(II) and Cd(II) ions with bidentate Schiff base 1,2-diphenyl-3-methyl-4-
benzaladene-5-oxo-pyrazole ligand which was prepared via the condensation
reaction of both benzaldehyde with 1,2-diphenyl-3-methyl-4-amino-5-oxo-pyrazole
in acidic medium. The complexes were synthesized by treating an ethanolic solution
of the ligand with appropriate amount of metal salts [1:2] [M:L] ratio. The
complexes were characterized by metal and elemental analysis, FTIR, electronic
spectra, molar conductivity, magnetic susceptibility and mole ratio. According to the
obtained data the probable coordination geometries of manganese, cobalt, nickel,
copper, zinc and cadmium ions in these complexes with nitrogen and oxygen as
donor atoms are octahedral. All complexes were found to be non-electrolyte systems
in absolute ethanol, and the complexes were formulated as [ML2Cl2]n H2O.