Mechanistic aspects of Friedel-Crafts alkylation over FeY zeolite



Document title: Mechanistic aspects of Friedel-Crafts alkylation over FeY zeolite
Journal: Journal of the Brazilian Chemical Society
Database: PERIÓDICA
System number: 000311805
ISSN: 0103-5053
Authors: 1




Institutions: 1Universidade Federal do Rio de Janeiro, Instituto de Quimica, Rio de Janeiro. Brasil
Year:
Season: Ago
Volumen: 17
Number: 4
Pages: 758-762
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental, aplicado
English abstract The effect of aromatic/alkylchloride molar ratio, base addition, solvent and alkylating agent on the ethylbenzene alkylation over FeY zeolite was investigated. It was shown that alkylation occurs inside the pores and it is little affected by the reactants molar ratio. On the other hand, addition of bases or oxygenated compounds, capable of complexing with the active site, blocks the reaction. A mechanism involving single electron transfer between the active iron species and the alkylchloride was propose to account for the results
Portuguese abstract Foram estudados os efeitos da razão molar aromático/cloreto de alquila, adição de base, solvente e agente alquilante, na alquilação do etilbenzeno catalisada pela zeólita FeY. Ficou caracterizada a alquilação ocorrendo no interior dos poros da zeólita, uma vez que ela é pouco afetada pela razão molar dos reagentes. A adição de bases e solventes oxigenados, capazes de complexar com o sítio ativo, inibe a reação. Foi proposto um mecanismo envolvendo transferência de um elétron entre as espécies de ferro ativas e o cloreto de alquila, para explicar os resultados
Disciplines: Química
Keyword: Química orgánica,
Zeolita,
Alquilación de Friedel-Crafts,
Cloruro de terbutilo,
Química verde
Keyword: Chemistry,
Organic chemistry,
Zeolite,
Friedel-Crafts alkylation,
Tert-butylchloride,
Green chemistry
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