Chemistry - Hydrocarbon Question with Solution | TestHub
Compounds which are more reactive than ethene towards electrophilic addition of
Options:(select one or more)
Answer:
Solution:
The question asks which compounds are more reactive than ethene towards electrophilic addition of HCl. Electrophilic addition reactions are favored by electron-donating groups.
A. (Butadiene): The presence of a conjugated double bond system makes it more reactive than ethene due to resonance stabilization of the intermediate carbocation.
B. : The nitro group () is an electron-withdrawing group, which DEACTIVATES the double bond towards electrophilic addition.
C. (Ethyne): Alkynes are generally LESS reactive than alkenes towards electrophilic addition due to the sp hybridization of the carbon atoms, which makes the electrons more tightly held and less available for electrophilic attack.
D. : The methoxy group () is an electron-donating group, which ACTIVATES the double bond towards electrophilic addition.
Therefore, A and D are more reactive than ethene.