| | Electrophilic Aromatic Substitution |
 | | Groups that donate electron density (alkyls, those with a lone pair at the point of attachment, those with less electronegative atoms connected to the atom of attachment) stabilize the carbocation intermediate that is formed during ortho and para electrophilic aromatic substitution, so these positions are favored. |
 | | There is no extra stability associated with the carbocation intermediate that is formed during meta substitution, so this position is not favored. |
 | | There is no extra instability associated with the carbocation intermediate that is formed during meta substitution, so this position is favored. |
| www.uwlax.edu /faculty/czerwinski/eas2.htm (451 words) |