Anti-Markovnikov addition of HBr (peroxide effect, Kharasch) (HBr + alkene + peroxide (ROOR) → radical chain; Br adds to less substituted C.)
jee-mainjee-advancedneet-ug
HBr + alkene + peroxide (ROOR) → radical chain; Br adds to less substituted C.
What each symbol means
| Symbol | What it stands for |
|---|---|
| Br· | Adds to less hindered alkene carbon; H· completes chain |
| ROOR | Dialkyl peroxide initiator (generates RO· which abstracts H from HBr) |
When to use this
Peroxides / radical initiators; does NOT apply to HCl or HI the same way in standard JEE framing (H–Cl bond too strong for propagation).