Second-order rate constants (k2) of the reaction between phenacylbromide and equimolar mixture of nitrobenzoicacid(s)–triethylamine have been determined in dimethylformamide (DMF)/acetonitrile (ACN)/acetone and aqueous mixtures of these solvents by conductometric method at 30°C. The rates of nitrobenzoicacids are found to be in the order: 4-NO2 > 3-NO2 > 3,5-(NO2)2. Changes in the rate just by the