, Aromatic Compounds
ELECTROPHILIC ADDITION
Introducing Benzene
Benzene is C6H6 and is:
colourless liquid
highly flammable
found in crude oil and cigarette smoke
carcinogenic
When one of the Hs in Benzene is replaced, it is called an aromatic compound
Kekuleʼs structure: Current Benzene Model:
current model is a sideways overlap of p-orbital to form a pi-system. The
extensive sideways overlap of p orbitals results in electrons being delocalised and
able to be freely spread over entire ring causing a pi system (two ring-shaped
clouds of electron density one above and another below the plane)
Why Kekuleʼs Structure was Disproved
1 CC bond lengths
ELECTROPHILIC ADDITION
Introducing Benzene
Benzene is C6H6 and is:
colourless liquid
highly flammable
found in crude oil and cigarette smoke
carcinogenic
When one of the Hs in Benzene is replaced, it is called an aromatic compound
Kekuleʼs structure: Current Benzene Model:
current model is a sideways overlap of p-orbital to form a pi-system. The
extensive sideways overlap of p orbitals results in electrons being delocalised and
able to be freely spread over entire ring causing a pi system (two ring-shaped
clouds of electron density one above and another below the plane)
Why Kekuleʼs Structure was Disproved
1 CC bond lengths
