Free radical aromatic substitution - hydrocarbon, Chemistry

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Free radical aromatic substitution - Hydrocarbon

The aromatic substitution reactions that follow free radical mechanisms are extremely few and have limited synthetic value. Although some typical illustartions of these reactions are: 

1482_Free radical aromatic substitution.png

The method of chlorination of benzene at high temperature is identical to that of the free radical aliphatic substitution

Cl2 → Cl + Cl (Chain initiation)

C6H6 + Cl → C6H5+HCl (H- abstraction)

C6H5 + Cl2 → C6H5Cl + Cl (Chain propagation)


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