The electrophilic aromatic substitution process proceeds through a
A
Free radical
B
Sigma complex
C
Benzene
D
Carbene
Correct Option:
B
Explanation
Electrophilic aromatic substitution proceeds through a positively charged intermediate called the sigma complex, arenium ion, or Wheland intermediate. The electrophile temporarily forms a sigma bond with the aromatic ring, causing loss of aromaticity, removal of a proton then restores aromaticity.
