2ROH,3ROH (SN1) Br H3C CH3 + (CH3C—OH+ Br Br+ OR Br Br Br CH3 SN →(CH)3C++HOPBr2 ↓Br (CH3)3CBr 2 oROH , 3oROH (SN1) (CH3 )3C OH + P Br Br Br SN2 SN1 (CH3 )3C+ + HOPBr2 (CH3 )3CBr Br - Br - + C O P H3C CH3 Br Br CH3 H +