| Autor: |
F. de Jong, A. van Zon, Y. Onwezen |
| Rok vydání: |
1982 |
| Předmět: |
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| Zdroj: |
Chemischer Informationsdienst. 13 |
| ISSN: |
0009-2975 |
| DOI: |
10.1002/chin.198207094 |
| Popis: |
Several immobilized benzo-18-crown-6 derivatives have been synthesized and a study has been made of their activities as triphase catalysts in the reaction between 1-bromooctane in toluene and aqueous potassium cyanide. In each case the reaction rate was proportional to the 1-bromooctane concentration and to the amount of catalyst and also depended on the potassium cyanide concentration. Under non-stirred conditions the activity per crown ether moiety was dependent on the degree of functionalization of the supporting polymer, being high for a highly substituted polystyrene/divinylbenzene resin and low for a sparingly substituted one. The beneficial effect of the high loading disappeared completely, however, under stirred conditions. The triphase catalyst can be used both with liquid-liquid-solid and with solid-solid-liquid systems and can be recovered without significant loss of activity. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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