Complexes of iron (II) with cysteine-HCl and methyl-cysteine-HCl are of interest as models for iron (II) coordination in proteine - Infrared and Raman spectra of these complexes and their free ligands are reported. These results show that cysteine is bounded to iron through sulfur, nitrogen and oxygen in Fe(Cyst)(H2O)1,5(A) and through sulfur and nitrogen in Na2Fe(Cyst)2H2O (B), Fe(metCyst)2(H2O)1,5(C).