Organic 6 (Benzene only)

What is the formula of benzene

C₆H₆

What type of compound is benzene

Aromatic compound

What structure do aromatic compounds contain

A ring structure

How many sigma bonds does each carbon atom form

3

What forms the skeleton of benzene

A planar hexagonal ring

What does each carbon atom have after sigma bonding

One unused electron

Where is the unused electron found

In a p orbital

What direction is each p orbital

At right angles to the planar molecule

How do the p orbitals form pi bonds

They fuse sideways

Where is the pi electron charge found

Above and below the sigma bonded skeleton

What are the pi electrons in benzene called

Delocalised electrons

What does delocalised mean

Electrons are free to move around the entire ring

What causes all carbon carbon bonds in benzene to be similar

Delocalisation

Why is benzene unexpectedly stable

Due to delocalised electrons

Are benzene carbon carbon bonds single or double

Neither

What are benzene carbon carbon bonds

Intermediate between single and double

What reaction type does benzene typically undergo

Substitution

What shape is benzene

Planar

Why is benzene non polar

Centres of positive and negative charge coincide

Why is benzene no longer used as an organic solvent

It is highly carcinogenic

What is used as a substitute for benzene

Methylbenzene

What is another name for methylbenzene

Toluene

What type of compounds can contain benzene rings

Pharmaceutical compounds