Комплексообразование ионов Mn(II), Cu(II), Ni(II), Со(II) и Zn(II) с основаниями Манниха

The acid-base properties of derivatives of Mannich bases and their complexation with Mn(II), Cu(II), Ni(II), Со(II) and Zn(II) ions in 50 % ethanol-water media, сomposition of complexes and their stability constants were determined using the method of рН-metric titration and the obtained experimental data characterizing equilibria of complexation with Mannich bases as ligands in water-ethanol solutions. Complexes of the M(II) : L = 1 : 2 composition were found to be formed in the experimental conditions.