Synthesis 2g - Benzene

Question 1

Benzene?

Answer 1

Simplest member of the class of aromatic hydrocarbons.

Question 2

The stability of the benzene ring is due to?

Answer 2

The delocalisation of electrons in the conjugated system.

Question 3

The presence of delocalised electrons explains why?

Answer 3

The benzene ring doesn’t take part in addition reactions.

Question 4

A benzene ring in which 1 hydrogen atoms has been substituted by another group is known as…

Answer 4

The phenyl group.
The formula is: -C6H5.

Question 5

Benzene electrophilic substitution reactions- how does it undergo halogenation?

Answer 5

By reaction of a halogen using AlCl3 for chlorination or AlBr3 for bromination.

Question 6

Benzene electrophilic substitution reactions- how does it undergo alkylation?

Answer 6

By reaction of a haloalkanes using AlCl3

Question 7

Benzene electrophilic substitution reactions- how does it undergo nitration?

Answer 7

Using concentrated H2SO4 and concentrated nitric acid.

Question 8

Benzene electrophilic substitution reactions- how does it undergo sulfonation?

Answer 8

Using concentrated sulfuric acid.