(3)碳正离子的重排 甲基转移 (CH)CCHCH,-(CH)2C-CH(CH)2 (CH)CCH-CH,HCL(CH)CCHCICH,+(CH).CCI-CH(CH 17% 83% 负氢转移 (CH.CHCHCH,一→(CH)2C-CH,CH ↓ (CH3)2CHCH=CH2 2 HBr (CH3)2CHCHBrCH3+(CH3)2CBr-CH2CH3 次要产物 主要产物 U(3)碳正离子的重排 甲基转移 (CH3 )3CCH=CH2 (CH3 )3CCHClCH3 + (CH3 )2CCl-CH(CH3 )2 HCl 17% 83% (CH3 )3CCHCH3 + + (CH3 )2C-CH(CH3 )2 (CH3 )2CHCH=CH2 (CH3 )2CHCHBrCH3 + (CH3 )2CBr-CH2CH3 HBr 次要产物 主要产物 (CH3 )2CHCHCH3 + + (CH3 )2C-CH2CH3 负氢转移