Learn alkene epoxidation with mCPBA: a concerted peracid mechanism that is stereospecific (cis → cis epoxide, trans → trans). Includes the interactive scrubber + practice.
Overall transformation: Alkene → epoxide
Reagents: mCPBA (or other peracid)
Mechanism: Concerted oxygen transfer (no carbocation)
Stereochemistry: Stereospecific; oxygen delivered from one face (syn relative addition)