Polarographic Study of Stability Constants of Lead (Ii) Complexes With B-Picoline and Some Amino Acids (Lysine And Metheonine)

Amit Verma, P. K. S. Chauhan and R. K. Paliwal*

Department of Chemistry, Narain College, Shikohabad- 205 135 (India)

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ABSTRACT:

The mixed ligand complexes of b-picoline (b-pico), Lysine (lys1-) and metheonine (meth1-) with Pb(II) have been studied polorographically at constant ionic strength, μ=1.5 M (NaNO3) and pH 6.0 at 25.4±0.1 °C. The reduction of the complexes at d.m.e. is reversible and diffusion-controlled. Two mixed complexes, [Pb(lys) (b-pico)]+ and [Pb(meth)(b-pico)]+ are formed and their stability constants at 25.4 °C are ; log b11 = 5.899 and log b11 = 6.148 respectively.

KEYWORDS:

Polarography; Mixed complexes; Stability constants