Which of the following ions is considered the best leaving group in nucleophilic substitution reacti — Reaction Mechanism Chemistry Question
Question
Which of the following ions is considered the best leaving group in nucleophilic substitution reactions under neutral conditions?
Answer: C
💡 Solution & Explanation
The best leaving groups are the weakest bases (conjugate bases of strong acids). Since $HI$ is the strongest acid, $I^-$ is the weakest base and an excellent leaving group.
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