Question

Identify the specific reagent used in the Swarts reaction (e.g., \(AgF\) or \(SbF_3\)).

• A. \(AgCl\)
• B. \(SbF_3\)
• C. \(FeCl_3\)
• D. \(HCl\)

Hint:

The Swarts reaction converts alkyl chlorides or bromides into alkyl fluorides using metallic fluorides such as \(SbF_3\), \(AgF\), or \(Hg_2F_2\).

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
The Swarts reaction is a named organic reaction specifically used for the synthesis of alkyl fluorides.
Fluorination is difficult using direct \(F_2\) gas, so halogen exchange is used.
Step 2: Key Formula or Approach:
The Swarts reaction involves the replacement of chloride or bromide in an alkyl halide with fluoride using metallic fluorides.
Step 3: Detailed Explanation:
Common reagents for the Swarts reaction include metallic fluorides like \(AgF\), \(Hg_2F_2\), \(CoF_2\), and \(SbF_3\).
Reaction example:
\[ 3CH_3Cl + SbF_3 \rightarrow 3CH_3F + SbCl_3 \]
Looking at the options provided:
(A) \(AgCl\) is a chloride, not a fluoride.
(B) \(SbF_3\) (Antimony trifluoride) is a standard metallic fluoride used for this purpose.
(C) \(FeCl_3\) is used in halogenation of benzene, not Swarts reaction.
(D) \(HCl\) is a hydrohalic acid used for substitution.
Step 4: Final Answer:
The specific reagent used is \(SbF_3\).