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Chhibrāmau, India

Singh J.V.,Nehru College | Awasthi A.,Nehru College | Dipti,Meerut College | Tomar A.,Meerut College | And 2 more authors.
Oriental Journal of Chemistry | Year: 2012

The kinetics of epoxidation of crotonic acid with hydrogen peroxide catalysed by sodium orthovanadate have been investigated at 40°C. The rate of epoxidation reaction is first order with respect to the [substrate] and [catalyst] and zero order in hydrogen peroxide concentration. The strength of the medium shows insignificant effect on the reaction rate. Temperature dependence parameters have been computed. On the basis of kinetics and experimental results, a suitable mechanism is proposed. Source


Singh J.V.,Nehru College | Awasthi A.,Nehru College | Dipti,Meerut College | Tomar A.,Meerut College | Singh D.,Chandra Shekhar Azad University of Agriculture & Technology
Asian Journal of Chemistry | Year: 2011

Heterocyclic halochromates, a new class of mild Cr(VI) reagents have been introduced recently as oxidizing agents for the oxidation of organic substrates. These reagents have been found to be better in their reactivity and selectivity compared to the common Cr(VI) oxidants. Pyridinium and quinolinium halochromates adds to the select list of newer Cr(VI) reagents as the most significant oxidants for the effective and selective oxidation of organic substrates under mild conditions. This review highlights the recent work done on the redox reactions of pyridinium and quinolinium halochromates from kinetic and mechanistic point of view and covers literature upto June 2010. Source


Singh J.V.,Nehru College | Awasthi A.,Nehru College | Dipti,Meerut College | Tomar A.,Meerut College | Singh D.,Chandra Shekhar Azad University of Agriculture & Technology
Asian Journal of Chemistry | Year: 2013

This review summaries the kinetic and mechanistic aspects of the oxidation reaction of reducing sugars with various oxidants, with emphasis to the Cr(VI) oxidation of reducing sugars. An attempt has been made to cover the recent literature available on oxidation kinetics of reducing sugars upto June 2011. Source


Singh J.V.,Nehru College | Awasthi A.,Nehru College | Dipti,Meerut College | Tomar A.,Meerut College | Agrawal G.L.,Dr H.S. Gour Vishwavidyalaya
Oriental Journal of Chemistry | Year: 2012

The oxidation kinetics of D-Galactose with pyridinium chlorochromate (PCC), have been studied in presence of perchloric acid. The reaction under pseudo-first order condition, is first order with respect to both the oxidant and the substrate. The reaction is markedly catalysed by H- ions and the effect of [NaClO4] is negligible. A1:1 stoichiometry is observed. Activation parameters have been computed by measuring the rates at different temperatures. A probable mechanism of the reaction is suggested. Source

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