The effect of pressure on the rate of the benzidine rearrangement

Abstract

The rate of the acid-catalysed rearrangement of hydrazobenzene in aqueous ethanol (95 wt.% EtOH) has been measured at pressures up to 5, 000 atmospheres. The reaction is slightly slowed by high pressures and the proportion of benzidine is increased, but not to so high degree. The results indicate that the rearrangement goes through a cyclic transition state, in which at least two partial bonds are predominant.