How do existing groups on a benzene ring dictate where new ones attach?
In short: Adding substituents to a benzene ring is not random. This video explains how electron-donating and electron-withdrawing groups influence the positioning of subsequent additions during electrophilic aromatic substitution, helping you predict chemical outcomes.
When a benzene ring already possesses a substituent, the process of electrophilic aromatic substitution (EAS) becomes more complex. The existing group acts as a director, influencing where a new group will attach to the ring.
The video explores the specific roles of electron-donating and electron-withdrawing groups in these reactions. By understanding how these groups modify the electron density of the benzene ring, chemists can better anticipate the regioselectivity of further substitutions.
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Sources
- Summary by Intellect · source: More EAS - Electron Donating and Withdrawing Groups: Crash Course Organic Chemistry #38
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