Synthesis, spectroscopic and crystal structure studies of bidentate Schiff base ligands prepared from 2-(methylamino) and 2-(ethylamino)benzaldehyde

Nowadays, Schiff base ligands play an essential role in coordination chemistry and their metal complexes exhibit various applications including catalyticactivity in organic reactions,biological activities, solar energy conversion and supramolecular devices [1-3].In this work, the structures and spectroscopic properties of some new bidentate Schiff base ligands, derived from the reaction of2-(methylamino) or 2-(ethylamino)benzaldehydewithethylenediamine and 4-nitro-1,2-phenylenediaminewere investigated. The prepared bidentate Schiff bases were characterized by FTIR, NMR, UV-Vis spectroscopy, and their crystal structures were determined by single crystal X-ray diffraction analysis.