Question

C6H10的烯有几种同分异构体（考虑顺反异构）

Answer 1

Ω=(6*2+2-10)/2=2 ∴2个不饱和度,为烯烃,则可能含2个双键或一个双键+一个环

(1) 2个双键

CH2=CHCH=CHCH2CH3 (Z,E 2种),CH2=CHCH2CH=CHCH3 (Z,E 2种)

CH2=CHCH2CH2CH=CH2,CH2=CHCH=C(CH3)2

CH2=C(CH3)CH=CHCH3 (Z,E 2种),CH2=CHC(CH3)=CH2CH3 (Z,E 2种)

CH2=CHCH2C(CH3)=CH2,CH2=CHCH(CH3)CH=CH2

CH3CH=CHCH=CHCH3 (Z,E 2种)

2个双键 共计14种

(2) 1个双键1一个环

三元环

CH2=CHCH(CHCH2CH2),CH3CH=CH(CHCH2CH2) (Z,E 2种) (括号内为环)

CH2=C(CH3)(CHCH2CH2),CH2=CH(C(CH3)CH2CH2),CH2=CH(CHCH(CH3)CH2)

CH3CH2CH2(C=CHCH2),CH3CH2CH2(CHCH=CH) (括号内双键为环上双键)

CH3CH2(C=C(CH3)CH2),CH3CH2(C=CHCH(CH3))

(CH3)2CH(C=CHCH2),(CH3)2CH(CHCH=CH)

(C(CH3)=C(CH3)CH(CH3)),(C(CH3)=CHC(CH3)2)

CH3CH2CH=(CCH2CH2),(CH3)2C=(CCH2CH2),CH3CH=(CCH(CH3)CH2) (Z,E 2种)

3元环 共计18种

四元环

CH2=CH(CHCH2CH2CH2),CH3C=(CCH2CH2CH2)

CH3CH2(C=CHCH2CH2),CH3CH2(CHCH=CHCH2)

CH2=(CCH(CH3)CH2CH2),CH2=(CCH2CH(CH3)CH2)

(C(CH3)=C(CH3)CH2CH2),(C(CH3)=CHCH(CH3)CH2),(C(CH3)=CHCH2CH(CH3))

(CH(CH3)CH=CHCH(CH3)),(C(CH3)2CH=CHCH2)

4元环 共计11种

五元环

CH=(CCH2CH2CH2CH2),CH3(C=CHCH2CH2CH2)

CH3(CHCH=CHCH2CH2),CH3(CH2CHCH=CHCH2)

5元环 共计4种

六元环

(CH=CHCH2CH2CH2CH2)

6元环 共计1种

2个双键1个环 共计18+11+4+1=34 种

总计：14+34=48 种

综上所述,C6H10的烯的同分异构体共有48种 (未考虑空间异构)