Synthesis and Spectral Properties of Cobalt(II) and Nickel(II) Complexes Derived from Bidentate Schiff Bases

Abstract

The Schiff bases L₁ = [N,N'-bis(2-hydroxybenzylidene)-1,2-benzenediamine] and L₂ = [N,N'-bis(2-hydroxy-5-nitrobenzylidene)-1,2-benzenediamine] have been synthesized for its characteristic parameter. The syntheses of Co(II) and Ni(II) complexes of these Schiff bases have been done by precipitation technique. The coloured metal complexes were crystallized from the methanolic solution. These complexes exhibit 1 : 1 as metal to ligand stoichiometry, which is evident from its elemental analysis. Various spectroscopic techniques were used to characterize these complexes and the spectra are used to evaluate the spectral parameters. The probable structure of metal complexes was suggested based on these spectral findings. The metal complexes are further investigated for their applied analytical and biological applications.