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Optimizing the kinetics of persulfate-mediated oxidative coupling of phenols to 4-aminoantipyrine

✍ Scribed by Ochan Otim

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
123 KB
Volume
33
Category
Article
ISSN
0538-8066

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✦ Synopsis

Abstract

The kinetics of the persulfate oxidation of phenol, p‐ethylphenol, and 1‐naphthol in the presence of 4‐aminoantipyrine under basic condition was studied. Parallel oxidation of 4‐aminoantipyrine was observed to influence the rate law in a very complicatedway. The rate law was simplified by limiting the concentration of the phenol, and optimizing the excess persulfate and the 4‐aminoantipyrine. Under such condition, the rate law is independent of the concentration of 4‐aminoantipyrine. The order of reaction was found to be one with respect to the concentrations of a phenol or persulfate. The second order rate constant was highest for 1‐naphthol followed by phenol and p‐ethylphenol in that order. © 2001 John Wiley & Sons, Inc. Int J chem Kinet 33: 600–604, 2001

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✍ Beate Kramer; Roland Fröhlich; Siegfried R. Waldvogel 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 175 KB

## Abstract The scope and performance of oxidative coupling reaction using MoCl~5~ can be significantly improved by employing Lewis‐acidic additives such as TiCl~4~, SnCl~4~, or SiCl~4~. Since the by‐product, HCl, plays a particular function as an inhibitor for MoCl~5~ by forming chloro complexes,