Abstract The rate of hydrolysis of several anilides is catalysed by cationic micelles ( cetyltrimethylammonium bromide), and inhibited by anionic micelles (sodium lauryl sulfate). The magnitude of catalysis is greatest for those anilides which contain the most hydrophobic R groups (R= C 7 H 15 and Ph) and is less for those containing less hydrophobic R groups (R= Me). The magnitude of catalysis is greater for compounds activated by nitro groups ...