Polynuclear Aromatic Hydrocarbons
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Define polynuclear aromatic hydrocarbons
Composed of two or more fused benzene rings
What is naphthalene ?
The simplest fused aromatic compound, consisting of two fused benzene rings
Naphthalene
What happens as the number of fused aromatic rings increases ?
The resonance energy per ring continues to decrease and the compounds become more reactive
Anthracene
Phenanthrene
What reaction does anthracene and phenanthrene undergo ?
Addition reaction, because they are less stabilized than benzene
These three compounds are found in tobacco smoke and are very hazardous
Give an example of fused heterocyclic compound
Purine
Purine
Fused heterocyclic compounds are common…
In nature
What is the application of fused heterocyclic compounds ?
Used as drugs to treat wide variety of illnesses