SPECTROSCOPIC STUDIES ON SOME DICARBOXYLIC-ACID DIHYDRAZIDE-IRON COMPLEXES

Some 2:1 (Ligand/Metal L/M) iron complexes of malonic acid dihydrazide (MDH) and phthalic acid dihydrazide (PDH), have been prepared, viz., [ML(2) . 2H(2)O]X, where X = SO42-, M = Fe(II) and [ML(2) . 2H(2)O](2) X(3), where M = Fe(III). The complexes were investigated by magnetic s usceptibility measurements and IR, electronic and Mossbauer spectrosco py. The results obtained indicate that the iron atom is coordinated oc tahedrally. Moreover, Fe(III) is reduced to Fe(II) in the MDH complex and Fe(II) is oxidized to Fe(III) in the PDH complex.