Abstract Three tetra-amine compounds 2-((2-(2-aminobenzylamino) ethylamino) methyl) benzenamine (L1), 2-((3-(2-aminobenzylamino) propylamino) methyl) benzenamine (L2), and 2-((4-(2-aminobenzylamino) butylamino) methyl) benzenamine (L3) were synthesized and then their reaction with 2-hydroxybenzaldehyde, 2-nitrobenzaldehyde, and 2-hydroxy-3- methoxybenzaldehyde were investigated. Treatment of L1, L2, and L3 with the former ...