4, 4'-Divinylhvdrazobenzene (I) has been prepared. The rates of the acid-catalyzed rearrangement of I in 95Y0 ethanol at 0'and 25', and in 75% t-butyl alcohol at 25'were determined. The rearrangement was followed by both the Bindschedler's Green titration method and spectrophotometrically. In each case the rearrangement was first-order in acid, over the range of acid concentrations 0.001 to 0.05 M. The rate of rearrangement of I is ...