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|Title:||Phosphonium ionic liquids as highly thermal stable and efficient phase transfer catalysts for solid-liquid Halex reactions|
Phase transfer catalyst
|Citation:||Fan, A., Chuah, G.-K., Jaenicke, S. (2012-12-30). Phosphonium ionic liquids as highly thermal stable and efficient phase transfer catalysts for solid-liquid Halex reactions. Catalysis Today 198 (1) : 300-304. ScholarBank@NUS Repository. https://doi.org/10.1016/j.cattod.2012.02.063|
|Abstract:||Trihexyl (tetradecyl) phosphonium tetrafluoroborate was found to be an active catalyst for the introduction of fluoride by nucleophilic aromatic substitution. With a decomposition temperature above 300 °C, this ionic liquid is suitable for reactions at high temperatures. The addition of 1 mol% of the ionic liquid relative to KF increased the initial rate for the fluorination of 1,2-dichloro-4-nitrobenzene six-fold compared to the uncatalysed reaction. The highest reaction rate was observed at 20 mol% ionic liquid relative to KF. Ease of handling without the need for stringent drying conditions and reuseability make this ionic liquid a useful phase transfer catalyst. © 2012 Elsevier B.V.|
|Source Title:||Catalysis Today|
|Appears in Collections:||Staff Publications|
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