5.5 Aromatic Hydrocarbons 5.5.1 Aromatic Structures LO: I understand what is meant by an aromatic hydrocarbon

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

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

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

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

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.

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

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.