What are Aromatic Compounds

Explore what makes aromatic compounds, like benzene, highly stable due to cyclic conjugation and planar structure, following Huckel's rule (4n+2) electrons for 2, 6, 10, or 14 electrons.

Explore three main categories of aromatic compounds: benzenoid, non-benzenoid, and other aromatic compounds. Show how benzene rings fused together form naphthalene, illustrating aromaticity through electron counts.

Explore electrophilic aromatic substitution on benzene, detailing how an electrophile replaces a ring hydrogen with selectivity, forms a resonance-stabilized carbocation intermediate, and yields a substituted aromatic product.

Explore electrophilic aromatic substitution on the benzene ring, covering halogenation with chlorine via AlCl3 and nitration via sulfuric acid–generated nitronium ion to nitrobenzene.

Learn how electron-donating groups direct aromatic substitution to the ortho and para positions, while electron-withdrawing groups direct to the meta positions, via resonance and electron density effects.

Electron releasing groups activate the benzene ring, speeding the electro follicle substitution reaction, while electron withdrawing groups deactivate it. Halogens are an exception, with resonance directing outcomes and product ratios.

This lecture explains ortho para directing groups and ring activators, showing how lone-pair donation and resonance raise electron density at the ortho and para positions, with halogens as exceptions.

Learn how meta directing groups deactivate the ring and steer electrophilic substitution to the meta position by withdrawing electrons and creating a positive charge at ortho and para sites.

explains how alkyl groups direct electrophilic aromatic substitution to ortho and para positions on benzene, via hyperconjugation-stabilized intermediates and resonance, contrasting with meta deactivation.

The alkyl group directs electrophilic substitution to the ortho and para positions of the benzene ring, with para as the major product due to more stable intermediates.