Which of the following alkyl halides would react the fastest with ^-OH in S_N2 reaction? CH₃CH₂Br,CH₃CH₂Cl,CH₃CH₂F,CH₃CH₂I A)CH₃CH₂Br B)CH₃CH₂Cl C)CH₃CH₂F D)CH₃CH₂I

Question

Quizplus · Accepted Answer

The reactivity of alkyl halides towards ^-OH in S_N2 reaction is based on the leaving group ability of the halogen. The better leaving group ability, the more reactive the alkyl halide will be. Among the given options, iodine(I) has the best leaving group ability, followed by bromine(Br), chlorine(Cl), and fluorine(F) has the poorest leaving group ability. Therefore, the alkyl halide with iodine will react fastest in this reaction. Hence, the correct answer is D) CH₃CH₂I.

Which of the Following Alkyl Halides Would React the Fastest