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Studies of Mn (II) and Ni (II) complexes with Schiff base derived from 2-amino benzoic acid and salicylaldehyde Aliyu, H. N. & Ado, I. Abstract The complexes of Mn (II) and Ni (II) with Schiff base derived from salicylaldehyde and 2-amino benzoic acid have been prepared and characterized by gravimetry, potentiometry, molar conductance and infrared analyses. The solubility test on the Schiff base and its nickel(II) complex revealed their solubility in most organic solvents except ether, acetonitrile and tetrachloromethane. However, manganese(II) complex is insoluble in most organic solvents but soluble in dimethylsulphoxide (DMSO). The molar conductance of the complexes measured are low, indicating their non-electrolytic nature. The potentiometric and spectrophotometric studies of the complex compounds revealed 1:1 metal to ligand ratio. Keywords Schiff base; Azomethine; Salicylaldehyde; Potentiometry; Spectrophotometry; 2-Amino benzoic acid.

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