Mechanism PBr. RCHoCOH RCHoC-Br= OH +OH Br-br RCH=C—Br RCH一C-Br Br RCHoCOoH RCH—C-Br Br RCHCOH RCHoC-Br BrOrganic Chemistry Organic Chemistry Xiamen Xiamen University University Mechanism Mechanism RC H 2 C O 2 H PBr 3 RC HCO 2 H Br RCH 2 C O Br RCH C OH Br Br B r RCH C OH Br Br + H + RCH C O Br Br RC H 2 C O 2 H RCH 2 C O + Br