期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2014
卷号：3
期号：10
页码：16903
DOI：10.15680/IJIRSET.2014.0310070
出版社：S&S Publications
摘要：Oxidation of thiamine hydrochloride (Vit. B1) by PDP mediated by micro amounts (10-6 mol dm-3 to 10-4) of Ru (III) in aqueous nitric acid medium has been studied at 25˚C. The reaction is second order in both PDP and Ru(III) concentrations. The order with respect to B1 concentration varies first order to zero order as the vitamin B1concentration increases, An increase in HNO3 concentration decrease the reation rate. The active species of Oxidantand catalyst are [PDP] and [Ru(H2O)6]3 A possible mechanism is proposed and reaction constants involved have beendetermined. Ruthenium (III) is an efficient catalyst in many redox reactions involving different complexities due to theformation of intermediate complexes, free radicals and multiple oxidation states of ruthenium PDP is a well Knownoxidant in acidic media PDP was act as predominant active species in the concentration range 0.30 – 2.0 moldm-3 ofNitric acid, but it role has not received much attention so far the oxidation of thiamine hydrochloride with alkalinepotassium ferricyanide, hypo iodide, chlorite and N-chloro benzene sulphonamide were studied. The literature surveyreveals that there were no report on the oxidation of thiamine hydrochloride by PDP the mechanism may be quitecomplicated due to the formation of different PDP and Ru (III) Complexes in the form of active complexes in nitricacid medium. Hence, we have investigated the Ru(III) mediated oxidation of vit B1 by PDP in order to understand thebehaviour of active species of oxidant and catalyst to propose a suitable mechanism.
