Question:
The correct order of rate of solvolysis for the following compounds is
The correct order of rate of solvolysis for the following compounds is
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Carbocation stability directly controls solvolysis rates. Benzylic>allylic>vinyl.
Updated On: Dec 14, 2025
- III>II>I
- II>I>III
- III>I>II
- II>III>I
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The Correct Option is D
Solution and Explanation
Step 1: Understanding solvolysis.
Solvolysis of alkyl halides proceeds via formation of a carbocation intermediate. The more stable the carbocation, the faster the solvolysis rate. Aromatic and benzylic systems show enhanced carbocation stability due to resonance.
Step 2: Comparing structures.
Structure III forms the most stable carbocation because the benzylic position allows extensive resonance stabilization. Structure II forms an allylic carbocation, which is moderately stabilized. Structure I forms the least stable carbocation because the vinyl halide does not form a stable carbocation and no resonance stabilization is possible.
Step 3: Conclusion.
Thus the rate of solvolysis follows: III>II>I.
Solvolysis of alkyl halides proceeds via formation of a carbocation intermediate. The more stable the carbocation, the faster the solvolysis rate. Aromatic and benzylic systems show enhanced carbocation stability due to resonance.
Step 2: Comparing structures.
Structure III forms the most stable carbocation because the benzylic position allows extensive resonance stabilization. Structure II forms an allylic carbocation, which is moderately stabilized. Structure I forms the least stable carbocation because the vinyl halide does not form a stable carbocation and no resonance stabilization is possible.
Step 3: Conclusion.
Thus the rate of solvolysis follows: III>II>I.
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