SN2 reaction can be best carried out with__________________?
Correct answer: A. primary alkyl halide
- A. primary alkyl halide
- B. secondary alkyl halide
- C. tertiary alkyl halide
- D. all
Explanation
SN2 reactions require backside attack by the nucleophile, so steric hindrance must be small; primary alkyl halides provide the least hindered carbon. Tertiary halides are strongly hindered and generally undergo SN1 or elimination instead. Students may choose secondary halide because it can undergo SN2, but it is less favourable than a primary halide.
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About Nucleophilic Substitution
Nucleophilic substitution replaces a leaving group in an alkyl halide when an electron-rich nucleophile attacks the carbon atom. The topic compares SN1 and SN2 mechanisms, including reaction conditions, substrate structure, solvent effects, nucleophile strength, carbocation formation and stereochemical changes, and distinguishes substitution from elimination.
Practise Alkyl Halides
458 free Alkyl Halides MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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More Nucleophilic Substitution questions
For which mechanisms the first step involved is the same ?
Alkyl halides are considered to be very reactive compounds towards nucleophile because_________________?
Alkyl halides undergo a type of reaction_________________?
Which alkyl halide out of the following may follow both SN1 and SN2 mechanism ?
Which one is not a nucleophile ?
Which alkyl halide has the highest reactivity for a particular alkyl group ?