R+ Na→Na+HHRR乙烯基负离子HRR+ NH → NH2HRH一
C C R H R + Na Na + + C C R H R - 乙烯基负离子 - C C R H R + NH3 C C R H R H + - NH2
烯炔部分氢化H,Pd/BaSOC6HsCH-C—CH=CH-C=C-C6H5喹啉CoHsHHCCoHsC6HsCH=C-CH=CHCoHs90%
烯炔部分氢化 C6 H5 CH C CH CH C C C6 H5 C6 H5 喹啉 Pd/BaSO4 H2 90% C6 H5 CH C CH CH C C H H C6 H5 C6 H5
4.4.1.2ElectrophillicadditionHXHXRC三CHRC=CH2RCX2CH3XHgCl2HC=CHCIHC三CH+ HCl120-180℃CH2CHCHC=CHCH-CHCH2C三CH+BnBrBr
4.4.1.2 Electrophillic addition HX HX RC CH2 RCX2 CH3 X RC CH H2 C CHCl C o 120-180 HgCl 2o HC CH + HCl CH2 CHCH2 C CH Br Br CH2 CHCH2 C CH + Br2
+RC=CH + H→>RC=CHh烯基正离子（不稳定的体系）RC-CH + H→ RCH-CHh烷基正离子（比较稳定）与溴的加成反应速度差可达500~50000倍
烯基正离子 (不稳定的体系) 烷基正离子 (比较稳定) 与溴的加成反应速度差可达500~50000倍
BrCH3Br,Et,OBr-20℃CH3CH,C三CCH3Br Br2Br2CH3-C-C-CH325℃Br Br
CH3 C CCH3 25 C o -20 C o 2Br2 Br2 ,Et 2 O CH3 C C CH3 Br Br Br Br C C CH3 CH3 Br Br