The paper deals with the study of the coordination compounds of Fe(III
) and Ln(III) with hydroxyphenylalanine (tyrosine). The compounds with
general formula FeLn(Tyr)6 .nH2O, Fe2Ln(Tyr)9 .nH2O and FeLn2(Tyr)9 .
nH2O (Ln(III) = La-Dy) were characterized by electronic and IR spectra
as well as by magnetic measurements.