Mossbauer absorption spectra were obtained for ferric complexes of ure
a and thiourea derivatives with dibasic acids. The complexes were prep
ared in the two ratios 1:1 and 2:1 metal to ligand. The Mossbauer para
meters were analysed inconsistent with the structural data obtained fr
om I.R. spectra. It was found that changing the metal - ligand ratio h
as nearly no effect on both the isomer shift and quadrupole splitting
values.