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Question

Arrange the following carbanions in order of stability.
874902_ce84f273f5064062b453492d2062982c.png

A
(I)>(III)>(II)
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B
(II)>(III)>(I)
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C
(I)>(II)>(III)
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D
(III)>(II)>(I)
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Solution

The correct option is B (I)>(III)>(II)
Carbocations are highly stable when there are electron-donating groups attached to it, that is, +R,+I groups.
So, in picture (1) the carbanion is stabilised by +R effect andin picture (2) the carbanion is stabilised by +I effect.
(3) PhCH2>CH3CHCH3>CH3CH2
Therefore, the correct order is shown in picture (3).

1117996_874902_ans_e86713b6ab454dcca36526ec24fa49e3.png

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