1. 5.5 Aromatic Hydrocarbons
Aromatic Structures
LO: I understand what is meant by an aromatic hydrocarbon

2. The most common aromatic compound is .
benzene
C6H6
Molecular formula =
Old structure:
This structure shows that all the bonds are
Modern structure:
equal
The bonds in benzene are somewhere between single and double bonds.
LO: I understand what is meant by an aromatic hydrocarbon

3. Some benzene containing compounds:
1,2-dimethylbenzene
1,3-dimethylbenzene
1,4-dimethylbenzene
LO: I understand what is meant by an aromatic hydrocarbon

4. Sometimes the benzene ring is better considered to be a group - a group
phenyl
phenylethene
(styrene)
LO: I understand what is meant by an aromatic hydrocarbon

5. 5.5.2 Aromatic Properties
LO: I understand how the properties of aromatic compounds relate to their structure.

6. There are no bonds in benzene.
double
As a result, aromatic compounds don’t behave like .
alkenes
The benzene ring contains electrons which move around the ring.
delocalised
This makes the ring very stable and resistant to .
addition
Benzene doesn’t decolourise solution.
bromine
LO: I understand how the properties of aromatic compounds relate to their structure.

7. LO: I know some products made from aromatic compounds.
5.5.3 Aromatic Products
LO: I know some products made from aromatic compounds.

8. petrol
pain killers
detergents
crude
naphtha
explosives
oil
agrochemicals
dyestuffs
plastics
demand
There is a competing for the naphtha fraction of crude oil to make fuel and consumer products.
LO: I know some products made from aromatic compounds.