Several factors contribute to the popularity of mCPBA as an oxidizing agent: 1. Selectivity: mCPBA is highly selective, often resulting in fewer by-products compared to other oxidizing agents. 2. Mild Conditions: Reactions involving mCPBA typically occur under mild conditions, preserving the integrity of sensitive functional groups. 3. Versatility: Its ability to oxidize a wide range of substrates makes mCPBA a versatile tool in synthetic chemistry.