The qualitative and kinetic behavior of a series of p-substituted N-bromoacylanilides when treated with trichloroacetic acid in chlorobenzene has been studied. The abnormal reaction which was previously demonstrated for the o-nitro derivative has been shown to occur with the p-isomer. The mechanisms of the normal and abnormal reactions are discussed. Some derivatives of 4-fluoro-3-bromoaniline are described.
