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Which of the following reagents may not ...

Which of the following reagents may not be used to convert alkyl chlorides and alkyl bromides into alkylfluorides?

A

`Hg_(2)F_(2)`

B

`SbF_(5)`

C

`AgF`

D

`CaF_(2)`

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AI Generated Solution

The correct Answer is:
To solve the question regarding which reagent may not be used to convert alkyl chlorides and alkyl bromides into alkyl fluorides, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Reaction**: The conversion of alkyl chlorides (R-Cl) and alkyl bromides (R-Br) into alkyl fluorides (R-F) can be performed using certain reagents. This reaction is known as the Schwarz reaction. 2. **Identifying the Reagents**: The reagents that are typically used for this conversion include: - Silver fluoride (AgF) - Antimony pentafluoride (SbF5) - Mercury(II) fluoride (Hg2F2) 3. **Analyzing Ionic vs. Covalent Character**: The effectiveness of these reagents in the Schwarz reaction is largely due to their covalent character. Covalent fluorides can easily react with alkyl halides, while ionic fluorides tend to have stronger bonds and are less reactive. 4. **Evaluating the Given Options**: Among the reagents mentioned, we need to determine which one has a significant ionic character that would hinder the reaction. - Calcium fluoride (CaF2) is an ionic compound and has a strong ionic bond, making it less suitable for the Schwarz reaction. 5. **Conclusion**: Therefore, the reagent that may not be used to convert alkyl chlorides and alkyl bromides into alkyl fluorides is **Calcium Fluoride (CaF2)**. ### Final Answer: **Calcium Fluoride (CaF2)** may not be used to convert alkyl chlorides and alkyl bromides into alkyl fluorides.
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