Aromatic substitution reactions, role charge-transfer complexes

In Solution. During the 1940s and 1950s, proposals were made by separate groups of workers that charge-transfer complexes had a role in electrophilic aromatic substitution (8-12). The idea was that in a reaction of an aromatic compound (ArH) with an electrophile (E), covalent bonding was preceded by transfer of charge from ArH to E ... 

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