Synthesis and characterization of new some first transition metals complexes of schiff base N, N'-bis [2-Methylenethiophene]-1, 2- phenylenediimine

Abstract EN

The Schiff base N, N'-bis[2-methylenethiophene]-1, 2-phenylen-diimine (L) was prepared by the reaction of 1, 2-phenylendiamine with 2-thiophencarboxaldehyde in (1:2) molar ratio, the reaction of above ligand with CoCl2.6H2O, NiCl2.6H2O,CuCl2.2H2O and ZnCl2 respectively in (1:1), (2:1) and (2:2) ligand to metal molar ratio produce the complexes of the general formula [MLCl2], [ML2]Cl2, [M2L2Cl4], where M Co(II), Ni(II), Cu(II) and Zn(II).

These complexes were characterized by infrared and electronic spectra, magnetic moment measurement, conductivity measurement and metal content analysis.

The result of electronic and magnetic measurements indicate a tetrahedral geometries for the complexes of the formula [MLCl2], [M2L2Cl4] while the complexes of the formula [ML2]Cl2 show square planer geometry.