Resumo

TEWARI, Brij B. COMPLEX FORMATION OF SOME DIVALENT METAL IONS WITH OXYGEN DONOR LIGANDS. Rev. Bol. Quim [online]. 2009, vol.26, n.1, pp.30-36. ISSN 0250-5460.

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

Palavras-chave : Paper electrophoretic technique; overall mobility; beryllium(II); complexes; cobalt(II) complexes; a-aminobutyric acid; stability constant.

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