
Terminal Alkyne

conjugated diene

10 e- aromatic system

an allylic chloride

a lactam

imine
Benzene with an E.A.S. deactivating and O/P directing substituent


alpha,beta-unsaturated ketone

unconjugated diene

hemiaminal

a vinylic chloride

Allene
an antiaromatic compound


acylium ion

quinone

hydrate

carboxylate

Beta-hydroxy ketone

diazonium ion

Beta-keto acid

carbonate

an isocyanate

an enediol

a pyranose