A. CH3CH=C(CH3)2 B. Cl2C=CHCH3 CH3CHOHCH2CH3 D. CH3CH=CBrCH3
A. —COOH B. —CH2OH C. —OH D. —CHO
A. (CH3)2C=C(CH3)2 B. CH3CH=CHCH3 C. (CH3)2C=C=CH2 D. (CH3)2C=CHCH3
A. π-π共轭效应 B. σ-π超共轭效应 C. σ-p超共轭效应 D. p-π共轭效应
A. 2,3-二甲基-2-丁烯 B. 2-甲基-2-戊烯 C. 反-2-丁烯 D. 顺-2-丁烯
A. 对 B. 错