Which of the following carbanion expected to be most stable?

1.	Which of the following carbanion expected to be most stable?
Answer» `p-NO_(2)C_(^)H_(4)overset(-)(C)H_(2)` `o-NO_(2)C_(6)H_(4)overset(-)(C)H_(2)` `o-CHOC_(6)H_(4)CH_(2)` `p-CHOC_(6)H_(4)CH_(2)` Solution :Carbanions are stabilised by electron withdrawing groups. `-NO_(2)` is stronger electron withdrawing group as compared to `-CHO`. At ortho-position, the EFFECT is more pronounced.

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