Question

The compound which undergoes SN1 reaction most rapidly is:

• A.
• B.
• C.
• D.

Hint:

Aromatic carbocations are stabilized through resonance, which makes the SN1} reaction faster for compounds where such stabilization can occur.

Answer 1

The Correct Option is A

In SN₁ reactions, the rate-determining step is the departure of the leaving group. In the case of aromatic compounds, a resonance-stabilized carbocation can form if the leaving group is attached to the ring, which makes the reaction faster. Hence, the phenyl bromide (C₆H₅Br) undergoes the reaction most rapidly.