Which one of the following carbanions is the least stable?

C H_{3} C H_{2}^{-}

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H C \equiv C^{-}

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(C_{6} H_{5}) C^{-}

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C H_{3}^{-}

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Solution

The correct option is A $C H_{3} C H_{2}^{-}$
$C H_{3} {C H_{2}}^{-}$ is least stable of the given compounds because of no resonance structure but with a electron donating group
( $C H_{3} -$ ).

Hence, Option "A" is the correct answer.

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Similar questions

Which of the following is least stable carbanion

C H_{3} O \oplus C H_{2}

C H_{3} \oplus C H_{2}

{M e}_{2} \oplus C H

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C H_{3} C H_{2} \oplus C H_{2}

C H_{2} = \oplus C H

C H_{3} \oplus C H_{2}

C H_{3} - C H_{3} | C | C H_{3} - C H_{2} - B r + N a O H \to C H_{3} - C H_{3} | C | C H_{3} - C H_{2} - O H

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