A series of triarylxnetliyl azides of the type pX-CsI11 (Ce€ I~) 2C~ i3, where X= 13, CI-I, O, CH,, C1, NO2 and N (CHJ2, has been prepared. On heating to 170-190" these substances evolve nitrogen to give mixtures of benzophenone anils. Analyses of the benzophenones from hydrolysis of the anils were used to determine migration aptitudes of the aryl groups. These migration aptitudes are relatively insensitive to the nature of the aryl group--p-anisyl ...