Copper(II) complexes with tetradentate imine-phenols: synthesis, characterization and molecular structures

Abstract

Abstract Four copper(II) complexes of N,N′-bis(4-methoxysalicylidene)-1,2-diimino ethanemonohydrate (1), N,N′-bis(5-methoxysalicylidene)-1,2-diiminoethane (2), N,N′-bis(3-methoxysalicylidene)-2,2-dimethyl-1,3-diiminopropane (3) and N,N′-bis(4-methoxysalicylidene)-2,2-dimethyl-1,3-diiminopropane (4) have been prepared and characterized spectroscopically. The solid-state structures of the complexes were established by X-ray crystallography. Complexes 2, 3 and 4 contain Cu(II) in a tetrahedrally distorted square planar environment with two phenolate O atoms being deprotonated. Complex 1 is five-coordinate and displays color isomerism. Keywords: CopperImine-phenolsMolecular structures Acknowledgements We thank the Department of Science and Technology (DST), New Delhi, for financial assistance and are also indebted to the National Science Council (ROC) for support under grant NSC86-2113-M-007-017.