CH_(2)=CH^(-) is a better nucleophile than HC -= C^(-). Explain.

1.	CH_(2)=CH^(-) is a better nucleophile than HC -= C^(-). Explain.
Answer» Solution :In `H_(2)C = CH^(-)`, the carbon atom carrying the -ve CHARGE is `SP^(2)` HYBRIDIZED while in `HC -= C^(-)`, the carbon atom carrying the -ve charge is sp-hybridized. Since a `sp^(2)`-hybridized carbon is less electronegative than a sp-hybridized carbon, THEREFORE, `H_(2)C = CH^(-)` is a better nucleophile than `HC -= C^(-)`.

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