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Inductive Effect

What is corre...

Question

What is correct order of stability of the following carbocations:
A. $+ C H_{2} - C H_{3}$
B. $+ C H_{2} - C H_{2} C l$
C. $+ C H_{2} - C H C l_{2}$
D. $+ C H_{2} - C C l_{3}$

A > B > C > D

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A > C > B > D

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D > C > B > A

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D > B > C > A

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Solution

The correct option is A $A > B > C > D$
Since $C l$ is an electron withdrawing group, it shows $- I$ effect.
Higher the number of $C l$ atoms attached, higher the stability of carbocation, because it neutralizes the positive charge more.
In option D, there are maximum number of $C l$ atoms attached to carbon.
So it will be the most stable, followed by C then B and A which is least stable.

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