Benzene & its compounds

?
  • Created by: Helen0_0
  • Created on: 06-12-18 06:42
What does an activating group mean, and how does it activates the benzene ring?
Activating groups donate electrons to the benzene ring and activates it by increasing its electron density. Electrophiles are hence more attracted to it, and form bonds with the benzene ring at 2,4,6 carbon position.
1 of 5
What does a deactivating group mean, and how does it deactivates the benzene ring?
A deactivating group removes electron density from the benzene ring, making electrophilic substitution reactions slower. Electrophiles form bonds with the benzene ring at 3, 5 carbon position.
2 of 5
List in order the stability of hydroxide ion, ethoxide ion, and phenoxide ion. Explain why.
OH- < C2H5O- <phenoxide The phenoxide ion, C6H5O–(aq), has its negative charge spread over the whole ion as one of the lone pairs on the oxygen atom overlaps with the delocalised π bonding system in the benzene ring.
3 of 5
What is the condition for the electrophilic substitution with Halogens for benzenes?
RTP. Catalyst - AlCl3
4 of 5
Why does Benzene resists addition reactions?
Addition reactions would involve breaking the delocalization of the electrons in the ring, making benzene loses its stability.
5 of 5

Other cards in this set

Card 2

Front

What does a deactivating group mean, and how does it deactivates the benzene ring?

Back

A deactivating group removes electron density from the benzene ring, making electrophilic substitution reactions slower. Electrophiles form bonds with the benzene ring at 3, 5 carbon position.

Card 3

Front

List in order the stability of hydroxide ion, ethoxide ion, and phenoxide ion. Explain why.

Back

Preview of the front of card 3

Card 4

Front

What is the condition for the electrophilic substitution with Halogens for benzenes?

Back

Preview of the front of card 4

Card 5

Front

Why does Benzene resists addition reactions?

Back

Preview of the front of card 5

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Arenes resources »