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Aldes Lesbani
Department of Chemistry, Faculty of Mathematic and Natural Sciences, Sriwijaya University, Jl. Raya Palembang-Prabumulih Km.32, Ogan Ilir 30662, Sumatera Selatan||Indonesia Laboratory of Graduate School Program, Sriwijaya University, Jl. Padang Selas
Chemical Engineering, Chemistry & Bioengineering Chemistry

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Brönsted Acid of Keggin Type Polyoxometalate Catalyzed Pinacol Rearrangement Aldes Lesbani; Risfidian Mohadi
Bulletin of Chemical Reaction Engineering & Catalysis 2014: BCREC Volume 9 Issue 2 Year 2014 (August 2014)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.9.2.6074.136-141

Abstract

Keggin type polyoxometalates K4[a-SiW12O40] was synthesized and transformed to H4[a-SiW12O40]. Both catalysts have been used for pinacol rearrangement in toluene at 373 oK. The results showed that reaction of pinacol rearrangement did not proceed using K4[a-SiW12O40] as catalyst. The extent reac-tion time until 20 h also did not produce pinacolone as main product. By using H4[a-SiW12O40] as cata-lyst at 1 h reaction time gave conversion 100% with formation of pinacolone 72%. The reaction produce 27% of 2,3-dimethyl-1,3-butadiene as byproduct and 99% carbon balance for the reaction. This phe-nomenon indicated the Brönsted acid is a key role for catalytic reaction of pinacol rearrangement to pinacolone. © 2014 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0)
Co-Authors Risfidian Mohadi