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Question

Which of the following is the correct order of stability of the following carbocations?

  1. I>IV>III>II
  2. IV>I>III>II
  3. III>II>I>IV
  4. II>I>IV>III


Solution

The correct option is B IV>I>III>II
Stability of carbocationNumber of α-H

Structure I has 5 α-H.


Structure II has 2 α-H.


Structure III has 3 α-H.

Structure IV has 8 α-H.


Therefore, the correct order of stability of carbocations is:
IV>I>III>II

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