PAKISTAN SOCIETY OF PHARMACOGNOSY & NATURAL THERAPY
PAKISTAN SOCIETY OF PHYTOPHARMACOLOGY & THERAPEUTICS
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KINETICS AND MECHANISM OF REDUCTION OF Fe(III)
SALICYLATE COMPLEX BY ASCORBIC ACID


Dilshad Waqar* and Bushra Bibi
Department of Chemistry, University of Karachi, Karachi-75270, Pakistan


ABSTRACT: The violet color complex FeSal+ was prepared by reaction of Salicylic acid and Ferric Chloride in acidic medium up to pH 3.5 in formate buffer at ionic strength 0.1 M. Reduction kinetics of FeSal+ complex at pseudo first order condition have been studied spectrophotometrically by a reductant i.e. Ascorbic acid. Reduction behaviour shows that reduction is much fast and pH dependent. A
mechanism to account for observation is also proposed. The mechanism conforms to the following rate law.