Quantitative Treatment of Bromide Ion Nucleophilicity in a Microemulsion

Article abstract of DOI:10.1021/j100222a033

The reaction of p-bromophenacylmethyl picryl ether with bromide ion was followed in a microemulsion of cetyltrimethylammonium bromide (CTABr), n-octane, and n-butyl or tert-amyl alcohol.The second-order rate constants in the microemulsion droplets were estimated from the concentration of Br- in the droplets determined electrochemically.These rate constants are insensitive to the composition of the microemulsion, are similar to those in CTABr micelles in water and in aqueous n-butyl, n-hexyl, and tert-amyl alcohol, and are slightly higher than those estimated for the reaction in water.They are smaller than rate constants in the water-alcohol mixtures of relatively low water content.