(a)形成低聚物 烯烃二聚： CH3 CH3 CH3 CH3 CH3 CH3 50%H2S04 CH2=C CH3-C=CH2 CH3-C-CH2-C=CH2 +CH3-C-CH=C-CH3 1000 CH3 CH3 CH3 80% 20% 机理： CH3 CH3 CH3 CH3 CH2=C CHa-C* CHz-C(CHz( HgC-CH2-0-cH3世、 CH3 3 CH3 CH3 CH3 CH3 CH3 CH3-C-CH2-C=CH2+CH3-C-CH=C-CH3 CH3 CH3 (a) 形成低聚物 烯烃二聚： CH3 -C=CH2 CH3 + 50% H2 SO4 100 C 。 CH3 -C-CH2 -C=CH2 CH3 CH3 CH3 + CH3 -C-CH=C-CH3 CH3 CH3 CH3 CH2 =C CH3 CH3 80% 20% 机理： CH3 -C-CH2 -C=CH2 CH3 CH3 CH3 + CH3 -C-CH=C-CH3 CH3 CH3 CH3 CH2 =C CH3 CH3 CH3 -C + CH3 CH3 H + CH2 =C(CH3 )2 CH3 -C-CH2 -C-CH3 CH3 CH3 CH3 + -H +