The iodides (Me3Si) 3CSiMe2I,(Me3Si) 3CSiPh2I, and But3SiL react with m- chloroperoxybenzoic acid to give the hydroxides (Me3Si) 3CSiMe2OH,(Me3Si) 2C (SiPh2Me)(SiMe2OH), and But3SiOH, respectively in MeOH (Me3Si) 3CSiPh2I suggests the participation of silico-cationic intermediates.