Question

halogenation of chlorobenzene​

Answer 1

Explanation:

Halogenation is an example of electrophillic aromatic substitution. In electrophilic aromatic substitutions, a benzene is attacked by an electrophile which results in substition of hydrogens. However, halogens are not electrophillic enough to break the aromaticity of benzenes, which require a catalyst to activate.

Answer 2

Answer:

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Explanation:

The reaction between benzene and chlorine in the presence of either aluminium chloride or iron gives chlorobenzene. The reaction between benzene and bromine in the presence of either aluminium bromide or iron gives bromobenzene. Iron is usually used because it is cheaper and more readily available.