EN
Chromium(III) complexes with DL-methionine and L-cysteine have beon investigated by pH-metric and spectrophotometric methods. In both investigated systems, three
complexes of the composition H : L = 1 : 1; 1 : 2; 1 :
3, have been found, stability constants for the resultant complexes have been determined by the method of
Bjerrum. Crystalline complexes with the investigated
ligands of the type: [Cr(Met)₃]. 2H₂O and Na[Cr(Cys)₂].
2H₂O were also obtained. The made combination of Cr(III)
with the investigated aminoacid and structures of the
complexes reported have been proposed on the basis of
their spectra. A method for precipitation pure complexes
from solutions has been devised using the ion-exchange
procese on the resin Sephadex A-25.