Answer: Alkyl fluorides from alkyl chlorides using AgF.
- A Alkyl fluorides from alkyl chlorides using AgF
- B Alkyl iodides from alkyl chlorides using NaI
- C Alkyl bromides from alkyl chlorides using NaBr
- D Alkyl chlorides from alkenes using HCl
Correct answer: A. Alkyl fluorides from alkyl chlorides using AgF
Explanation: Swarts reaction: RCl + AgF → RF + AgCl. Silver fluoride is used because the insoluble AgCl drives the reaction forward and F is too electronegative to generate HF easily.
SN2 proceeds in a single step with backside attack and inversion of configuration, while SN1 forms a planar carbocation intermediate first, leading to racemisation.
Concept context
Study carbon-halogen compounds: how they are made, how they react via SN1/SN2 and elimination, their stereochemistry, and their environmental impact.