7. Substitution Reactions
Substitution Comparison
10:13 minutes
Problem 6a
Textbook Question
Textbook QuestionFor each reaction, give the expected substitution product, and predict whether the mechanism will be predominantly first order (SN1) or second order (SN2). Hint: The strength of the nucleophile (or base) usually determines the order of the reaction. Strong nucleophiles encourage bimolecular, second-order reactions, and weak nucleophiles more commonly react by unimolecular, first-order mechanisms. Also, SN2 is unlikely with 3° halides, and SN1 is unlikely with 1° halides unless they are resonance-stabilized. d. cyclohexylbromide + methanol e. Cyclohexylbromide + sodium ethoxide
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