Abstract
The hydrolysis of the p-nitrophenyl acetate catalyzed by different hydroxamate ions (RCONHO−; R = C6H5, 2-OHC6H4, CH3) was investigated at 27°C in aqueous media containing polyethylene glycol(MW = 4000 and 8000) at various pH values. Hydroxamate ions are effective alpha effect nucleophile for acylation reactions. Addition of PEG accelerates the rate of hydrolysis. The rate-polymer profile has been explained by applying different models. A mechanism for the catalyzed reaction is proposed. The BHA-PEG combination is more effective.
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