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Vol. 30 No. 12 (2018): Vol 30 Issue 12

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Ru(III) Catalyzed Oxidation of Ciprofloxacin by Iron(III): A Kinetic and Mechanistic Approach

https://doi.org/10.14233/ajchem.2018.21539
P.K. Asha
Department of Chemistry, New Horizon College of Engineering, Bangalore-560 103, India
Vidyavati S. Shastry
Department of Chemistry, SEA College of Engineering and Technology, Bangalore-560 049, India
V.S. Anusuya Devi
Department of Chemistry, New Horizon College of Engineering, Bangalore-560 103, India

Corresponding Author(s) : P.K. Asha

ashapkind@gmail.com

Asian Journal of Chemistry, Vol. 30 No. 12 (2018): Vol 30 Issue 12

Abstract

Oxidation of fluoroquinolone class antibiotic i.e., ciprofloxacin using hexacyanoferrate(III) in the presence of ruthenium catalyst has been investigated spectrophotometrically in an aqueous alkaline medium at room temperature. The main reaction product was identified by LC-MS was 4-cyclopropyl-7-fluoro-2-hydroxy-6-(piperazin-1-yl)naphthalen-1(4H)-one. Stoichiometric ratio obtained was 1:2, that is for each mole of ciprofloxacin two moles of hexacyanoferrate(III) are required for their complete oxidation. The reaction exhibited unit order with respect to hexacyanoferrate(III) and Ru (catalyst) and it was found to be less than unit order for [OH−] and ciprofloxacin. Considering the possible reactive species of reactant and a most probable kinetic mechanism have been envisaged. Mechanism was proposed for the reaction using the activation parameters and thermodynamic quantities calculated with respect to the slow step mechanism.

Keywords

Ciprofloxacin Kinetics Hexacyanoferrate(III) Ruthenium
Asha, P., Shastry, V. S., & Anusuya Devi, V. (2018). Ru(III) Catalyzed Oxidation of Ciprofloxacin by Iron(III): A Kinetic and Mechanistic Approach. Asian Journal of Chemistry, 30(12), 2665–2670. https://doi.org/10.14233/ajchem.2018.21539
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