当■ As was the case with hydrocarbon substituents derived from alkanes and alkenes, alkynyl groups are also possible CH3CH2 CH2CH2 CH3 CH2CH=CH Butyl -Butenyl CH3CH2C≡C 1-ButynyIOrganic Chemistry Organic Chemistry Xiamen Xiamen University University „ As was the case with hydrocarbon substituents derived from alkanes and alkenes, alkynyl groups are also possible: CH 3CH 2CH 2CH 2 CH 3CH 2CH CH CH 3CH 2C C Bu t y l 1- B u t eny l 1- B u t yny l