Definition
The positively charged intermediate of an electrophilic aromatic substitution reaction.
Explanation
The delocalization of non aromatic carbocation, and since the electrophile is attached to the benzene ring via a sigma (Q) bond.
Sigma Complex
In one sentence
The positively charged intermediate of an electrophilic aromatic substitution reaction.
Terms used on this page
Every one of these links to a full definition with an example.