SYNTHESIS AND CHARACTERIZATION OF NEW COMPLEXES FOR (1E,1E)-N, N-(thiobis (4,1-phenylene)) bis(1-phenylmethanimine) SUBSTITUTED LIGANDS WITH Fe3+

Abstract

This work include synthesis of two types of aromatic Schiff bases derived by condensation of 4,4-diaminodiphenyl sulfide with4 cyanobenzaldehyde and 4 dimethyl amino benzaldehyde. I.R. and U.V-Visible spectroscopy were used to determine metal:ligand ratio and complex formation. The result showed the ligand has an ability to form colored complex with ferric ion at ratio (1:2) M: L, that have $\lambda $ max575nm of complex 1 and 450 nm complex2. The optimum complexity was conditions found at pH 6.9 toligand1and ligand2 with ferric ion at a temperature range (65-70 oC) were identified and the period time of complexity not affected the formation complexes were stable through 24 hours, where the electronic spectrum of the Schiff bases and their complexities were studied using the principle of continues variation method (Job's method), to propose the structural formula of the complex it was (1:2) (metal : Ligand). These ligands and complexes have been identified by using IR, U.V-Visible and melting point measurements.