Which of the following carbanions is the most | vedclass

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(A) The stability of a carbanion is determined by the hybridization of the carbon atom bearing the negative charge. $1$. $HC \equiv C^{\ominus}$ has $

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$HC \equiv C^{\ominus}$

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(A) The stability of a carbanion is determined by the hybridization of the carbon atom bearing the negative charge. $1$. $HC \equiv C^{\ominus}$ has $sp$ hybridization ($50\% \ s$-character). $2$. $(CH_3)_2C = CH^{\ominus}$ has $sp^2$ hybridization ($33.3\% \ s$-character). $3$. $C_6H_5^{\ominus}$ has $sp^2$ hybridization ($33.3\% \ s$-character). $4$. $(CH_3)_3C - CH_2^{\ominus}$ has $sp^3$ hybridization ($25\% \ s$-character). Greater $s$-character increases the electronegativity of the carbon atom,making it better at holding the negative charge. Therefore,the $sp$ hybridized carbanion $HC \equiv C^{\ominus}$ is the most stable.

Which of the following carbanions is the most stable?

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