The gel of radiation crosslinked poly(ethylene oxide) (PEO) was used as a highly active phase transfer catalyst in the model displacement reaction of 1-bromooctane with aqueous sodium and potassium cyanides in the absence of organic solvent. The reaction follows pseudo-first-order kinetics and the rate is linearly dependent on the amount of PEO gel. The reaction rate is not limited by intraparticle diffusion and mass transfer at stirring speeds above 200 rev min-1. Crosslinked PEO is easily produced in large quantities from commercially available polymer so it may be used successfully as a gel medium for phase transfer catalysis in various substitution reactions.
Посилання на статтю:
Crosslinked poly(ethylene oxide) as a phase transfer catalyst / T. Tsanov, R. Stamenova* and C. Tsvetanov // Polymer. – 1993. – Vol 34. – P. 616-620.