Question

What is the relative rate of \( \text{S}_\text{N}1 \) reaction for \( (\text{CH}_3)_2\text{CH–Br} \)?

• A. \(10^6\)
• B. Less than \(10^{-4}\)
• C. \(0.02\)
• D. \(1.0\)

Hint:

Relative rates of \( \text{S}_\text{N}1 \) reactions depend on carbocation stability.

Answer 1

The Correct Option is D

Step 1: Nature of the substrate.
\((\text{CH}_3)_2\text{CH–Br}\) is a secondary alkyl halide.
Step 2: Reference standard.
In relative rate studies of \( \text{S}_\text{N}1 \) reactions, secondary alkyl halides are taken as the standard with rate equal to 1.
Step 3: Conclusion.
Therefore, the relative rate of the \( \text{S}_\text{N}1 \) reaction is \(1.0\).