同上,,
1.打开一个双键:2.打开两个双键...
可以得到4种加成产物
CH2BrCBrCH=CH2 CH2BrC=CH-CH2Br CH2=CCHBrCH2Br CH2BrCBrCHBrCH2Br
~ | | | |
~ CH3 CH3 CH3 CH3