Aromatic Toolbox

 

Bromination

Name: Bromination of benzene

Type: Electrophilic substitution

Temperature: room temp (298K = 25°C)

Pressure: 1 atm (atmospheric pressure)

Homologous series

-          of reactant: Arene

-          of product: Bromoarene

By-products:

HBr (aq) = hydrobromic acid

or HBr (g) = hydrogen bromide gas

benzene

liquid bromine

iron(III) bromide catalyst or

iron metal catalyst

bromobenzene

 

Chlorination

Name: Chlorination of benzene

Type: Electrophilic substitution

Temperature: room temp (298K = 25°C)

Pressure: 1 atm

Homologous series

-          of reactant: Arene

-          of product: Chloroarene

By-products:

HCl (aq) = hydrochloric acid

or HCl (g) = hydrogen chloride gas

benzene

gaseous chlorine

aluminium chloride catalyst

chlorobenzene

 

Nitration

Name: Diazotisation

Type: Electrophilic substitution

Temperature: less than 55°C

Pressure: 1 atm

Homologous series

-          of reactant: Arene

-          of product: Nitroarene

benzene

nitrating mixture:

1. concentrated sulphuric acid

2. concentrated nitric acid

nitrobenzene

 

Diazotisation

Name: Nitration of benzene

Type: Electrophilic substitution

Temperature: less than 55°C

Pressure: 1 atm

Homologous series

-          of reactant: Arene

-          of product: Nitroarene

phenylamine

Nitrous acid (HNO2)

1. Sodium nitrite

2. Nitric or hydrochloric acid

nitrobenzene