Can Cl2 react with benzene without a catalyst?

[Jay0689]

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In destroyer #227, benzene with one amino and one bromine para to each other reacts with Cl2 and H20. The product has one Cl on each side of the NH2 group.

Maybe I'm forgeting my basic reactions, but I thought you needed a catalyst like AlCl3 or UV light to substitute a halogen into a benzene ring.

Can anybody remind me of what I'm missing? thanks!

 

[needzmoar]

In destroyer #227, benzene with one amino and one bromine para to each other reacts with Cl2 and H20. The product has one Cl on each side of the NH2 group.

Maybe I'm forgeting my basic reactions, but I thought you needed a catalyst like AlCl3 or UV light to substitute a halogen into a benzene ring.

Can anybody remind me of what I'm missing? thanks!

Generally, yes, you need the catalyst. However, amino groups are such powerful activators that a catalyst is not required.

 

[JohnnnyD]

👍

Generally, yes, you need the catalyst. However, amino groups are such powerful activators that a catalyst is not required.

 

[Jay0689]

Thanks for the help! I'll add that to my growing list of reactions I never knew about until doing destroyer.