Question

The reactivity order of the following molecules towards SN1 reaction is:
Allyl chloride (I), Chlorobenzene (II), Ethyl chloride (III)

• A. I>II>III
• B. I>III>II
• C. II>I>III
• D. III>I>II

Answer 1

The Correct Option is D

The rate of an \(S_N1\) reaction depends on the stability of the carbocation formed.

Allyl chloride produces a resonance-stabilized allyl carbocation, increasing its stability.

Ethyl chloride generates a primary carbocation, which is less stable than the allyl carbocation.

Chlorobenzene typically does not undergo \(S_N1\) reactions because the carbocation would be destabilized by the aromatic ring.

Therefore, the reactivity order is III>I>II.