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Substitution vs. Elimination

SN2
SN1
E2
E1
Competition between SN2, SN1, E2, and E1
Chemistry LibreTexts - Classification of Reagents as Electrophiles and Nucleophiles. Acids and Bases

Good place to start.

Chemistry LibreTexts - Mechanisms of Nucleophilic Substitution Reactions

Chemistry LibreTexts - Structural and Solvent Effects in SN Reactions

Chemistry LibreTexts - Elimination Reactions

Topic Resources

Interdisciplinary MCAT Course Videos
Conceptual Vocabulary
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figures for classroom presentation