Please use this identifier to cite or link to this item: https://doi.org/10.1016/S1381-1169(99)00051-5
Title: Catalytic dechlorination of chlorobenzenes: Effect of solvent on efficiency and selectivity
Authors: Lassová, L.
Lee, H.K. 
Hor, T.S.A. 
Keywords: Chlorinated benzenes
Dechlorination
Hydrodehalogenation
Polychlorobenzenes
Selectivity
Solvent
Issue Date: 19-Aug-1999
Citation: Lassová, L., Lee, H.K., Hor, T.S.A. (1999-08-19). Catalytic dechlorination of chlorobenzenes: Effect of solvent on efficiency and selectivity. Journal of Molecular Catalysis A: Chemical 144 (3) : 397-403. ScholarBank@NUS Repository. https://doi.org/10.1016/S1381-1169(99)00051-5
Abstract: Polychlorinated 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.
Source Title: Journal of Molecular Catalysis A: Chemical
URI: http://scholarbank.nus.edu.sg/handle/10635/93237
ISSN: 13811169
DOI: 10.1016/S1381-1169(99)00051-5
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

26
checked on Sep 21, 2018

WEB OF SCIENCETM
Citations

25
checked on Sep 11, 2018

Page view(s)

31
checked on Jul 6, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.