25.2 Electrophilic substitution Flashcards
1
Q
what reaction does Benzene undertake?
A
electrophilic substitution
2
Q
what temperature does Electrophilic substitution occur at and why?
A
no more than 50 degrees
otherwise it will lead to further substitution
3
Q
why cant benzene undergo addition reactions?
A
Benzene has a delocalised pi system with p orbital electrons found above and below the plane
makes it very stable as there is a low electron density
therefore Benzene is unwilling to undergo an addition reaction
4
Q
why can alkenes undergo addition reactions?
A
they have a localised pi system with a higher electron density
means electrons are more susceptible to electrophilic attack
5
Q
what does benzene need to react with a halogen?
A
a halogen carrier catalyst
