Aromatic compounds and their reactions

(4n + 2) electrons delocalised

6, 10, 14, 18, ....

technically *>CH parts (! but for ...)

Naphthalene (C₆H₆ -2H + 4*CH =C₁₀H₈)

Anthracene (C_6H₆ -2H + 4*CH =C₁₀H₈)

Phenanthrene (C_6H₆ -2H + 4*CH =C₁₀H₈)

with higly reactive partners

under specific circumtances

Aromatic substitution requires a so-called attack agent: a higly reactive, usually unstable and mostly

charged intermediate particle, which attacks and distorts the π–electron sextet. In order to maintain

aromacity, a hydrogen is released to give valence to the new-comer group or atom.

Catalyst is used to ’develope’ the attack agent.