Making chlorobenzene
Benzene reacts with chlorine in the presence of a catalyst, replacing one of the hydrogen atoms on the ring by a chlorine atom.
The reaction happens at room temperature. The catalyst is either aluminium chloride or iron.
Strictly speaking iron isn't a catalyst, because it gets permanently changed during the reaction. It reacts with some of the chlorine to form iron(III) chloride, FeCl3.
This compound acts as the catalyst and behaves exactly like aluminium chloride, AlCl3, in this reaction.
The reaction between benzene and chlorine in the presence of either aluminium chloride or iron gives chlorobenzene.
or, written more compactly:
Making chlorobenzeneBenzene reacts with chlorine in the presence of a catalyst, replacing one of the hydrogen atoms on the ring by a chlorine atom.The reaction happens at room temperature. The catalyst is either aluminium chloride or iron.Strictly speaking iron isn't a catalyst, because it gets permanently changed during the reaction. It reacts with some of the chlorine to form iron(III) chloride, FeCl3.This compound acts as the catalyst and behaves exactly like aluminium chloride, AlCl3, in this reaction.The reaction between benzene and chlorine in the presence of either aluminium chloride or iron gives chlorobenzene.or, written more compactly:
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