Coordination Compound of Fe(III) with N,N′-bis(salicylidene)-methylenediamine

The bis-Schiff base, N,N'-bis(salicylidene)-methylenediamine, (H2L1) known as Salmen, forms together Fe(III) allow acid pH a brown precipitate, which is stable at room temperature. Study of the IR spectroscopy and the chemical analysis has evidenced that the precipitation form is a complex and the combination ratio of M:L is 1:1. The precipitation form will be used as a method for the gravimetric determination of Fe(III) with Salmen. The precipitate was dried at room temperature at constant weight and weighed as C15H12O2Fe(OH).2H(2)O. The analytical application presents an average relative error of +/- 0.5%, and interferences with Cu(II), Zn(II), Cr(III), Mn(II), Ni(II), U(VI) and Co(II).