Catalytic Hydromethoxylation of Acetylene over Pre-Activated K2PdCl4

The catalytic addition of methanol to the triple bond of acetylene occurred on the surface of mechanically pre-activated K 2 PdCl 4 and formed dimethylacetal and the vinyl chloride by-product. The addition of alcohol occurs regioselectively in accordance with the Markovnikov rule. The stereoselectiv...

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Bibliographic Details
Published in:Kinetics and catalysis 2020-11, Vol.61 (6), p.879-885
Main Authors: Krasnyakova, T. V., Nikitenko, D. V., Khazipov, O. V., Mitchenko, S. A.
Format: Article
Language:English
Subjects:
Catalysis
Chemistry
Chemistry and Materials Science
Physical Chemistry
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Summary:The catalytic addition of methanol to the triple bond of acetylene occurred on the surface of mechanically pre-activated K 2 PdCl 4 and formed dimethylacetal and the vinyl chloride by-product. The addition of alcohol occurs regioselectively in accordance with the Markovnikov rule. The stereoselectivity of acetylene hydrochlorination corresponds to the trans -addition of H and Cl to the C≡C triple bond of acetylene. The effective activation energies of reaction routes were determined. A possible mechanism of formation of H 3 C–CH(OCH 3 ) 2 and H 2 C=CHCl was proposed.
ISSN:0023-1584
1608-3210
DOI:10.1134/S0023158420060038