IRON(III) COMPLEXES OF 1,2-DI(IMINO-4′-ANTIPYRINYL)ETHANE

Abstract

Iron(III) complexes of the Schiff base 1,2-di(imino-4′-antipyrinyl)ethane (L) have been prepared and characterized by elemental analyses, electrical conductance in non-aqueous solvents, infrared and electronic spectra as well as magnetic susceptibility measurements. The complexes have the general formula [Fe(L)(ClO4)](ClO4)2 and [Fe(L)X2]X (X = NO3, SCN, Cl or Br). L acts as a neutral tetradentate ligand coordinating through both carbonyl oxygens and both azomethine nitrogens. In the perchlorate complex, one of the perchlorate ions is coordinated bidentately while in the nitrate and thiocyanate complexes two of the anions are coordinated monodentately to the metal ion. In the chloride and bromide complexes, two of the halide ions are coordinated. A high-spin octahedral geometry is assigned around Fe(III) in all of these complexes.