Question

When tert butyl bromide is heated with silver fluoride the major product obtained is

• A. 1-Fluoro-2-methylpropane
• B. 2-Fluoro-2-methylpropane
• C. 1-Flurobutane
• D. 2-Flurobutane

Hint:

Swarts Reaction is the best method for synthesizing alkyl fluorides from other halides.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
The reaction of an alkyl halide with a metal fluoride (like $\text{AgF}$, $\text{Hg}_2\text{F}_2$) to form an alkyl fluoride is known as the Swarts reaction.
Step 2: Key Formula or Approach:
Swarts Reaction: $\text{R}-\text{X} + \text{AgF} \rightarrow \text{R}-\text{F} + \text{AgX}$
Step 3: Detailed Explanation:
Tert-butyl bromide has the structure $(\text{CH}_3)_3\text{C}-\text{Br}$.
When it reacts with $\text{AgF}$, the Bromine atom is replaced by a Fluorine atom through a halogen exchange process.
The resulting product is $(\text{CH}_3)_3\text{C}-\text{F}$.
Its IUPAC name is 2-Fluoro-2-methylpropane.
Step 4: Final Answer:
The major product is 2-Fluoro-2-methylpropane.