Cho các chất sau: CH2=CH–CH2–CH2–CH=CH2; CH2=CH–CH=CH–CH2–CH2
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Cho các chất sau: CH2=CH–CH2–CH2–CH=CH2; CH2=CH–CH=CH–CH2–CH2; CH3–C(CH3)=CH–CH3; CH2=CH–CH2–CH=CH2; CH3–CH2–CH=CH–CH2–CH2; CH3–C(CH3)=CH–CH3–CH3; CH3–CH3–C(CH3)=C(C2H5)–CH(CH3)2; CH3-CH=CH-CH3.
