Abstract
Kinetic parameters and stability constant of complexes of Mn with doxycycline, chlortetracycline, oxytetracycline, tetracycline, monocycline, amoxicillin and chloramphenicol as primary ligands and cefoperazone as secondary ligand have been reported polarographically at pH = 7.30 ± 0.01, μ = 1.0 M NaClΟ 4 at 25 °C. Mn 2+ formed 1: 1: 1, 1: 1: 2 and 1: 2: 1 complexes. The stability constant (log β) varied from 1.85 to 9.25 showed that these drugs or in combination with cefoperazone or their metal complexes could be used for Mn toxicity. The values of kinetic parameters viz. transfer coefficient (a), degree of irreversibility (λ) and rate constant (k) confirmed that the electrode processes were quasireversible and the 'transition state' is a function of applied potential. A small variation in potential not only affects the rate but rate constant greatly.
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