Lesbani, Aldes and Mohadi, Risfidian (2014) Brönsted Acid of Keggin Type Polyoxometalate Catalyzed Pinacol Rearrangement. Bulletin Chemical Reaction Engineering and Catalysis.
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Abstract
Keggin type polyoxometalates K4a-SiW12O40 was synthesized and transformed to H4a-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 K4a-SiW12O40 as catalyst. The extent reac- tion time until 20 h also did not produce pinacolone as main product. By using H4a-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 Br{\"o}nsted acid is a key role for catalytic reaction of pinacol rearrangement to pinacolone.
| Item Type: | Article |
|---|---|
| Subjects: | Q Science > QD Chemistry > QD1-999 Chemistry |
| Divisions: | 08-Faculty of Mathematics and Natural Science > 47201-Chemistry (S1) |
| Depositing User: | Mr Aldes Lesbani |
| Date Deposited: | 13 Dec 2019 01:47 |
| Last Modified: | 13 Dec 2019 01:47 |
| URI: | http://repository.unsri.ac.id/id/eprint/21562 |
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