Comparative study of the cationic surfactants and their influence on the alkaline hydrolysis of acetylsalicylic acid |
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| Authors: | Birendra Kumar Kallol K Ghosh P Rodriquez Dafonte |
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| Institution: | 1. School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur 492 010, India;2. Departamento de Quimica Fisica, Universidad de Santiago de Compostela, 15782, Santiago de Compostela, Spain |
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| Abstract: | A kinetic study of the reaction of acetylsalicylic acid (aspirin) with sodium hydroxide has been studied in the presence of some conventional and novel cationic surfactants. The pseudo‐first‐order rate constant increases with the surfactant concentration initially and then decreases. In comparison to conventional cationic surfactants, i.e., cetyltrimethylammonium bromide and cetylpyridinium bromide, novel alkyldiethylethanolammonium bromide (R = C16) surfactant accelerated the alkaline hydrolysis significantly. The pseudophase ion‐exchange model has been applied to fit the experimental results. Activation parameters have also been evaluated. © 2010 Wiley Periodicals, Inc. Int J Chem Kinet 43: 1–8, 2011 |
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