Functionalized Azobenzenes Chromogens with Aromatic Amino Primary Groups

The paper presents experimental data regarding some azobenzenes synthesized by coupling diazonium salt of 2,6-dichlor-4-nitro-, 2-cyan-4-nitroor 4-nitro-aniline with different coupling components as: N-βacetoxyethyl-N-β-cyanoethyl-, N-ethyl-N-β-hydroxyethyl-, N,N-di-β-hydroxyethyl-3-methyl-aniline and selective reduction of nitrodyes with obtaining the corresponding azodyes having primary amino groups grafted on the azostructure. Reaction products were purified and characterized by means of elemental analysis, UV-VIS, IR and 1H-NMRspectroscopy. Structure-property relationships in the azoderivatives are discussed with respect to the structure and nature of the substituents.