Abstract: Rate constants for thermal decomposition of the p-N02, m-N02, m-methyl, p-methyl, and unsubstituted (pheny1azo) triphenylmethane (1) in octane and several aromatic solvents have been determined and correlated with medium viscosity. Decomposition rate constants for pN02 and unsubstituted 1 in n-alkane solvents previously reported have been reanalyzed. These data indicate that p scission of intermediate diazenyl radicals is an ...