dibenzoyl peroxide

1: (EtO)3P, Et3N 2: (PhCO)2O2 View Scheme

ozone in tetrachloromethane; hexane

KOH in water byproducts: KCl, H2O; continous purging with N2; K2PtCl4 was added to the soln. of phosphite and KOH at 70°C until red colour persisted for more than 1 min; several min at 70-80°C until turns colourless; crystn. on cooling, washing with ethanol/water, vac. drying;