Which of the following is a slow step in SN1 reactions?
Correct answer: B. Formation of carbocation
- A. Ionization
- B. Formation of carbocation
- C. Formation of Double bond
- D. Formation of alkyl halide from carbocation
Explanation
The formation of a carbocation is the slow, or rate-determining, step. The subsequent step, formation of a bond between the nucleophile and the carbocation, occurs very rapidly. Because the slow step of the reaction involves only the substrate, the reaction is unimolecular.
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About Alkyl Halides
Alkyl halides are named and related to their carbon-halogen structure, polarity and reactivity. The key reactions are nucleophilic substitution by SN1 and SN2 mechanisms and elimination by E1 and E2 mechanisms, including how substrate structure, nucleophile, base, solvent and temperature influence substitution versus elimination.
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