Synthesis of New Alkanediamine Schiff Bases Containing an Ester Function. Preparation and Characterization of NiII Complex with 1,3-Trimethylenediamine Schiff Base

Abstract Schiff bases obtained by reaction between β-ketoester ethyl-α-ketocyclopentylcarboxylate (C8H12O3) and various aliphatic diamines NH2(CH2)nNH2, where n = 2, 3, 4, were prepared and studied. Also prepared was the complex of NiII and the Schiff base of 1,3-trimethylenediamine (L), with the formula NiLCl2-6H2O. The Schiff bases were characterized by elemental analysis, IR spectroscopy and 1H and 13C-NMR. The NiII compound was characterized by elemental analysis, IR, UV and visible spectroscopy, magnetic susceptibility and thermal analysis. A tetrahedral environment set N2Cl2 of donor atoms is proposed for NiII