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Article: Catalytic dechlorination of chlorobenzenes: Effect of solvent on efficiency and selectivity

TitleCatalytic dechlorination of chlorobenzenes: Effect of solvent on efficiency and selectivity
Authors
KeywordsSolvent
Dechlorination
Hydrodehalogenation
Polychlorobenzenes
Chlorinated benzenes
Selectivity
Issue Date1999
Citation
Journal of Molecular Catalysis A: Chemical, 1999, v. 144, n. 3, p. 397-403 How to Cite?
AbstractPolychlorinated benzenes were dechlorinated with NaBH4, using PdCl2(dppf) (dppf = 1,1'-bis(diphenylphosphino)ferrocene) as the catalyst. A variety of solvents, namely THF, CH3CN, DMSO, diglyme, DMF and DMA (dimethylacetamide) were examined. A supporting base, TMEDA (N,N,N,N- tetramethyl-1,2-ethylenediamine) was used in some cases. Catalytic activity was strongly solvent-dependent with DMA and DMF showing the best performance. Addition of TMEDA improved the yields in all cases, except for DMSO. In DMA, when TMEDA was used, the catalyst showed appreciable activity even after 2 weeks of reaction. Both solvent and the presence/absence of a base had a strong influence on the selectivity of the reaction. For example, the dechlorination of pentachlorobenzene led to 90% 1,2,3,4-tetrachlorobenzene in DMA/TMEDA, but to 80% 1,2,4,5-tetrachlorobenzene in DMSO/TMEDA.
Persistent Identifierhttp://hdl.handle.net/10722/219469
ISSN
2015 Impact Factor: 3.958
2015 SCImago Journal Rankings: 1.072

 

DC FieldValueLanguage
dc.contributor.authorLassová, Luisa-
dc.contributor.authorLee, Hian Kee-
dc.contributor.authorHor, T. S Andy-
dc.date.accessioned2015-09-23T02:57:10Z-
dc.date.available2015-09-23T02:57:10Z-
dc.date.issued1999-
dc.identifier.citationJournal of Molecular Catalysis A: Chemical, 1999, v. 144, n. 3, p. 397-403-
dc.identifier.issn1381-1169-
dc.identifier.urihttp://hdl.handle.net/10722/219469-
dc.description.abstractPolychlorinated benzenes were dechlorinated with NaBH4, using PdCl2(dppf) (dppf = 1,1'-bis(diphenylphosphino)ferrocene) as the catalyst. A variety of solvents, namely THF, CH3CN, DMSO, diglyme, DMF and DMA (dimethylacetamide) were examined. A supporting base, TMEDA (N,N,N,N- tetramethyl-1,2-ethylenediamine) was used in some cases. Catalytic activity was strongly solvent-dependent with DMA and DMF showing the best performance. Addition of TMEDA improved the yields in all cases, except for DMSO. In DMA, when TMEDA was used, the catalyst showed appreciable activity even after 2 weeks of reaction. Both solvent and the presence/absence of a base had a strong influence on the selectivity of the reaction. For example, the dechlorination of pentachlorobenzene led to 90% 1,2,3,4-tetrachlorobenzene in DMA/TMEDA, but to 80% 1,2,4,5-tetrachlorobenzene in DMSO/TMEDA.-
dc.languageeng-
dc.relation.ispartofJournal of Molecular Catalysis A: Chemical-
dc.subjectSolvent-
dc.subjectDechlorination-
dc.subjectHydrodehalogenation-
dc.subjectPolychlorobenzenes-
dc.subjectChlorinated benzenes-
dc.subjectSelectivity-
dc.titleCatalytic dechlorination of chlorobenzenes: Effect of solvent on efficiency and selectivity-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S1381-1169(99)00051-5-
dc.identifier.scopuseid_2-s2.0-0345517975-
dc.identifier.volume144-
dc.identifier.issue3-
dc.identifier.spage397-
dc.identifier.epage403-

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