A SIMPLE, GREEN AND EXPEDITIOUS SYNTHESIS OF SALEN OF 2-HYDROXY 1- NAPTHALDEHYDE WITH ETHYLENE DIAMINE IN WATER AND ITS COMPLEXATION WITH VARIOUS TRANSITION METALS (CU, CO, FE AND NI) EXPLORING ULTRASOUND WAVES.

Abstract

A salen type ligand of 2-hydroxy 1- napthaldehyde with ethylene diamine was synthesized by sonochemical process. The synthetic process is simple yet efficient using environmentally benign water as a solvent. The synthesized salen ligand was characterized by physical constant, 1H NMR, FT-IR, HRMS, and UV-visible spectroscopy. The ligand was then coupled with various transition metals (Cu, Co, Ni, and Fe) under sonication and metal complexes were prepared. The metal complexes are obtained in excellent yield under sonication within short period of time. The metal complexes are identified by FT-IR, HRMS and UV-visible spectroscopic analysis.The developed protocol is simple, clean, high yielding, green, and with reduced reaction times by application of sonication. The products are purified by simple filtration followed by washing with water/alcohol and drying processes.