Synthesis and characterization of iron(II) complexes containing furoylhydrazone ligands

Complexes having the chemical compositions Fe(HL)(2)Cl-2 [HL = 2-acetylthio phene-2-furoylhydrazone (Hatfh), 2-acefylfuran-2-furoylhydrazone (Haffh), 2 -acetylpyridine-2-furoylhydrazone (Hapfh)]; Fe(Hhafh)Cl(H2O) [H(2)hafh = (o ) under bar-hydroxy-acetophenone-2-furoylhydrazone); [Fe(H(2)dapfn)Cl]Cl [H (2)dapfh = 2,6-diacetylpyridine bis(2-furoylhydrazone)]; FeL2(H2O)(n) [HL = Hatfn, Haffh, n = 2; L = Hapfh, n = 0]; Fe(hafn)(H2O)(3) and Fe(dapfh)(H2O ) have been prepared and characterized. The electrical conductivity indicat es a non-ionic nature of the complexes except [Fe(H(2)dapfh:)Cl]Cl which is a 1:1 electrolyte in solution. Magnetic susceptibility, IR and electronic spectra of the complexes were employed to establish the stereochemistry and mode of bonding of the hydrazones. Mossbauer spectra indicate that iron is in the +2 oxidation state in these complexes.