Synthesis and Characterization of Nickel(II) and Copper(II) Complexes of the Schiff Bases Derived from 4-/6-Methyl-Δ3-tetrahydrobenzaldehyde and Glycine

Abstract

Nickel(II) and copper(II) complexes with the Schiff bases derived from 4-methyl-Δ³-tetrahydrobenzaldehyde or 6-methyl- Δ³-tetrahydrobenzaldehyde and glycine were synthesized. These compounds have been characterized by elemental analysis, conductivity measurements and infrared spectroscopy. The Schiff base ligands and their complexes have been further characterized by ¹H NMR. The results suggest that the Schiff base acts as a bidentate ligand which bonds to the metal ions through the imino nitrogen and carboxylate oxygen. The potassium salts of the Schiff bases are 1:1 electrolytes, but all the complexes are non-electrolytes.