COMPLEX FORMATION OF SOME DIVALENT METAL IONS WITH OXYGEN DONOR LIGANDS

Abstract

Complexation reaction of a-aminobutyric acid with beryllium(II) and cobalt(II) have been studied in solution phase using paper electrophoretic technique. This method is based on the movement of a spot of metal ion in an electric field at various pH's of the background electrolyte. A plot of overall mobility of metal / complex ion versus pH was used to obtain information on the binary complexes and to calculate stability constants. The stability constant of the ML and ML2 complexes of beryllium(II) - a-aminobutyric and cobalt(II) - a-aminobutyric acid have been found to be (7.19 ± 0.05, 6.81 ± 0.13) and (4.47 ± 0.04, 2.81 ± 0.09) (logarithm stability constant values), respectively at 35°C and ionic strength 0.1 M

Complexation reaction of a-aminobutyric acid with beryllium(II) and cobalt(II) have been studied in solution phase using paper electrophoretic technique. This method is based on the movement of a spot of metal ion in an electric field at various pH's of the background electrolyte. A plot of overall mobility of metal / complex ion versus pH was used to obtain information on the binary complexes and to calculate stability constants. The stability constant of the ML and ML2 complexes of beryllium(II) - a-aminobutyric and cobalt(II) - a-aminobutyric acid have been found to be (7.19 ± 0.05, 6.81 ± 0.13) and (4.47 ± 0.04, 2.81 ± 0.09) (logarithm stability constant values), respectively at 35°C and ionic strength 0.1 M