Abstract

TEWARI, Brij Bhushan. Studies on Biologically Significant Copper (II) / Manganese (II) / Uranyl (II) - Isoleucine Binary Complexes. J. Mex. Chem. Soc [online]. 2008, vol.52, n.3, pp.219-223. ISSN 1870-249X.

The stability constants of Cu²⁺, Mn²⁺ and UO₂²⁺ complexes with isoleucine were determined by paper electrophoretic technique. Present method is based upon the migration of a spot of the metal ions on a paper strip at different pH's of background electrolyte. A graph of pH against mobility gives information about the binary complexes and permit to calculate their stability constants. The first and second stability constants of [Cu(II) - isoleucine], [Mn(II) - isoleucine] and [UO₂(II) - isoleucine] complexes were found to be (8.41 ± 0.07; 6.43 ± 0.03), (3.87 ± 0.11; 2.61 ± 0.06) and (7.91 ± 0.13; 5.73 ± 0.04) for Cu(II), Mn(II) and UO₂(II) complexes, respectively at ionic strength 0.1 Mol/L and a temperature of 35 ⁰C

Keywords : Paper ionophoresis; overall mobility; copper(II); manganese(II) and uranyl(II); stability constants; isoleucine.

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