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what is means Sigma complex intermediate. Soon deproptonation occurs and nitro benzene is formed.


what is means Sigma complex intermediate. Soon deproptonation occurs and nitro benzene is formed.  



 


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Komal
askIITians Faculty 747 Points
7 years ago
Although the\pi electrons are in a stable aromatic system, they are still available for reaction with strong electrophiles.This generates a carbocation which is resonance stabilized (but not aromatic).This cation is called a sigma complex because the electrophile is joined to the benzene ring through a new sigma bond.

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