Collect. Czech. Chem. Commun.
1992, 57, 1811-1820
https://doi.org/10.1135/cccc19921811
Study of the Coordinated System Cd(II)-Valine-Valinate Ion
Jesús César Rodríguez Placeres, Ana María Alloza Moreno, Remedios Sosa Diaz and Graciliano Manuel Ruiz Cabrera
Department of Physical Chemistry, University of La Laguna, Tenerife, Canary Islands, Spain
Abstract
The polarographic method has been applied to the study of the coordinated systems Cd(II)-neutral valine and Cd(II)-valinate ion in aqueous medium and I = 1.0 mol l-1 (NaClO4). The stability constants of the complexes were determined as: [Cd(HV)]2+ (β10 = 7 ± 0.5), [Cd(HV)2]2+ (β20 = 24 ± 4), [Cd(HV)3]2+ [β30 = (1.5 ± 0.32) . 102], [Cd(V-)]+ [β01 = (4.1 ± 0.3) . 103], [Cd(V-)2] [β02 = (1.3 ± 0.2) . 107], [Cd(V-)3]- [β03 = (1.5 ± 0.3) . 109], [Cd(HV)(V-)]+ [β11 = (4.3 ± 0.8) . 104], [Cd(HV)(V-)2] [β12 = (1.7 ± 0.3) . 107] and [Cd(HV)2(V-)]+ [β21 = (1.2 ± 0.3) . 105].
