Laser Raman Investigation of Solid State Rearrangement of bis(O-lodobenzoyl) peroxide into 1-(2'-Iodobenzoyloxy)-1, 2-benziodoxolin-3-one

In solid state, the thermal rearrangement of bis(O-iodobenzoyl) peroxide which yields 1-(2'-iodobenzoyloxy)-1,2-benziodoxolin-3-one,is investigated by laser Raman spectroscopy. The intramolecular vibration spectra are used to characterize this chemical rearrangement. The phonon spectra obtained as a function of the rearrangement progress show that, in spite of the reported topotactic nature of the reaction, it proceeds by a heterogeneous mechanism. A temperature dependence study of the phonon spectra reveal no mode-softening for any optical phonons. Therefore, no evidence has been found for this reaction to be phonon-assisted.