7. Substitution Reactions
Substitution Comparison
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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