Aromatic Hydrocarbons

Alkanes, Alkenes, Alkynes

Aliphatic hydrocarbon

Very diff and specific set of reactions that sets them apart as unique class of hydrocarbon molecules

Aromatic hydrocarbons

Aromatic hydrocarbon class also referred to as

Arene

6 membered ring of carbon atoms containing three alternate C double bonds

Benzene

Delocalization allows _____ to be spread out over six carbon rings

Pi electrons

Benzene rings are considered ____

Stable

Monosubstituted benzene derivatives are simply named _____ no locants needed

substituted benzenes

Two present substituents are given what prefixes

Ortho, meta, para

Ortho, meta, para are used to describe substituents that are separated by _____ carbons

2,3,4

Three or more substituents use locants to…

Designate their position

Ortho

Meta

Para

M- nitrotoluene

Composed of one or more benzene ring fused together

Polycyclic Aromatic Hydrocarbons

Benzene shares two or more C rings

Fused

2 fused carbon rings

Napthalene

3 fused C rings

Antracene

4 fused C rings

Pyrene

Unusual stability, lack of reactivity

Aromatic compounds

What reaction does Aromatic rings display

Ekectrophilic Aromatic Substitution

Replace of H atoms on ring w/ other groups; benzene derivatives by substitution

EAS

Double bonds break, electrons used @ positive portion of electrophile

Cationic intermediate, H restores