Studies on mercury (ii), nickel (ii) and lead (ii) biologically important binary complexes with α-aminobutyric acid in solution

• Brij Bhushan Tewari ^[1]
  1. [1] University of Guyana

     University of Guyana

     Guyana

     
• Localización: Revista de la Sociedad Química del Perú, ISSN-e 2309-8740, ISSN 1810-634X, Vol. 77, Nº. 2, 2011, págs. 144-151
• Idioma: inglés
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• Resumen

  • Complexation reactions of α-aminobutyric acid with mercury (II), nickel (II) and lead (II) have been studied in solution phase using a paper ionophoretic technique. This method is based on movement of a spot of metal ion in an electric field at various pHs of background electrolyte. A plot of pH versus mobility was used to obtain information for binary complexes and to calculate its stability constants. The stability constants of the ML+ and ML binary complexes of metal(II) α-aminobutyric acid have been found to be (8.59 ± 0.01; 6.93 ± 0.05), (6.83 ± 0.03; 5.38 ± 0.07) and (4.42 ± 0.02; 2.72 ± 0.03) (logarithm stability constant values) for the mercury (II), nickel (II) and lead (II) complexes, respectively at ionic strength 0.1 M (HClO4) and a temperature of 35° C.