I CH2-CH2 t Nacl O 不反应 BrCh,ch, Br Nacl ③CH2=CH2+Br BrCH, Ch,cI 50 BrCH ch2oh H2O CH2-CH2 Br BrCH, ch,ohOrganic Chemistry Organic Chemistry Xiamen Xiamen University University CH 2 CH 2 + N a C l H 2 O 不反应 CH 2 CH 2 + B r 2 H 2 O NaCl CH 2 CH 2 + B r 2 H 2 O BrCH 2CH 2Br BrCH 2CH 2Cl BrCH 2CH 2OH BrCH 2CH 2OH