CH2 = CH2 + HBr 催化剂加热 = CH3—CH2Br. nCH2 = CH2 催化剂 [ CH2—CH2 ] n 苯 + Br2 催化剂 苯— Br + HBr 苯酚 +3Br2 催化剂====246三溴苯酚 ↓+3HBrhttp://www.vcmblog.com/UploadFiles/2007-1/122729005.doc都有 好找式子很正规