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- Title
Brönsted Acid of Keggin Type Polyoxometalate Catalyzed Pinacol Rearrangement.
- Authors
Lesbani, Aldes; Mohadi, Risfidian
- 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 °K. The results showed that reaction of pinacol rearrangement did not proceed using K4[a-SiW12O40] as catalyst. The extent reaction time until 20 h also did not produce pinacolone as main product. By using H4[a-SiW12O40] as catalyst 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 phenomenon indicated the Brönsted acid is a key role for catalytic reaction of pinacol rearrangement to pinacolone.
- Subjects
PINACOL rearrangement; POLYOXOMETALATES; OXIDATION of toluene; CATALYSIS; MORE O'Ferrall-Jencks diagrams
- Publication
Bulletin of Chemical Reaction Engineering & Catalysis, 2014, Vol 9, Issue 2, p136
- ISSN
1978-2993
- Publication type
Article
- DOI
10.9767/bcrec.9.2.6074.136-141