A series of ter-butyl peresters having a general formula corresponding to I were synthesized. The thermally initiated rates of decomposition of these peresters were determined at several temperatures and the activation parameters for these thermolyses were calculated. The rates of decomposition were relatively insensitive to the substituents and followed the order I> C2H5> C6H5S> H> Br> Cl. The activation parameters and product studies were ...