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  4. With a change in hybridisation of the carbon bearing the charge, the stability of a carbanion increase in the order

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Q. With a change in hybridisation of the carbon bearing the charge, the stability of a carbanion increase in the order

Organic Chemistry – Some Basic Principles and Techniques

Solution:

Carbanion is electron rich species. Stability of carbanion increases with increase in $s$-character of hybrid orbitals of carbon bearing the charge.
$\therefore s p^3< s p^2< s p$
($25\%$ s-character) ($33\%$ s-character) ($50\%$ s-character)