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Vol. 29 No. 8 (2017): Vol 29 Issue 8

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Oxidation of Some Methoxy Anilines by Tetrabutylammoniumbromochromate in Aqueous Acetic Acid Medium: A Kinetics Study

https://doi.org/10.14233/ajchem.2017.20656
Shaik Jabir
Research and Development Centre, Bharathiar University, Coimbatore-641 046, India
Basim H. Asghar
Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, P.O. Box: 9569, Makkah, Saudi Arabia
S. Sheik Mansoor
Department of Chemistry, C. Abdul Hakeem College (Autonomous), Melvisharam-632 509, India

Corresponding Author(s) : S. Sheik Mansoor

smansoors2000@yahoo.co.in

Asian Journal of Chemistry, Vol. 29 No. 8 (2017): Vol 29 Issue 8

Abstract

The oxidation of aniline (A), 2,4-dimethoxy aniline (2,4-DMA), 2,6-dimethoxy aniline (2,6-DMA), 2,4,6-trimethoxy aniline (2,4,6-TMA) and 3,4,5-trimethoxy aniline (3,4,5-TMA) by tetrabutylammoniumbromochromate (TBABC) have been studied in 50 % acetic acid – 50 % water medium in the presence of perchloric acid. The oxidation leads to the formation of the corresponding azobenzenes. The reaction is first order with respect to [TBABC], [S] and [H+]. The reaction has been found to be catalyzed by H+ ions. The reactions were studied at four different temperatures and thermodynamic parameters were calculated. The rates decreased in the order: 2,4,6-TMA > 2,6-DMA > 2,4-DMA > 3,4,5-TMA > aniline.

Keywords

Tetrabutylammoniumbromochromate Methoxy aniline Thermodynamic parameters Kinetics
Jabir, S., Asghar, B. H., & Mansoor, S. S. (2017). Oxidation of Some Methoxy Anilines by Tetrabutylammoniumbromochromate in Aqueous Acetic Acid Medium: A Kinetics Study. Asian Journal of Chemistry, 29(8), 1806–1810. https://doi.org/10.14233/ajchem.2017.20656
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