- E-ISSN: 2223-506X
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oa Direct oxidation of esters and their path established by stoichiometry, product analysis and the Taft-Pavelich four-parameter relationship
- Source: QScience Connect, Volume 2013, Issue 1, يونيو ٢٠١٣, 36
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- ٢١ أغسطس ٢٠١٣
- ١٦ سبتمبر ٢٠١٣
- ٠١ نوفمبر ٢٠١٣
ملخص
A characteristic property of esters is that, they undergo both oxidation and hydrolysis under similar conditions. Furthermore, the product of each process is an aldehyde (the product of hydrolysis is alcohol, which in turn undergoes oxidation to give an aldehyde). It is, therefore, difficult to find out which process is operative. The kinetics of the reaction offers an opportunity to resolve this uncertainty. This method is illustrated in this article with two examples: oxidation of esters by Tl3+ and oxidation of esters by Co3+. The method described in this paper familiarizes students with the basic techniques involved in following the reaction, such as quenching the reaction, ensuring that the aliquots of reaction mixture are equal, taking the reaction mixture at all time intervals in an identical manner, taking infinite readings and the use of a thermostat. It also provides familiarity with the use of integrated rate equation, plotting graphs, the evaluation of slopes on graphs and the calculation of rate constants.
