12.9     Which of the two: O_{2}NCH_{2}CH_{2}O^{-} or CH_{2}CH_{2}O^{-}is expected to be more stable and why ?

Answers (1)
M manish

Since Nitro group is an electron withdrawing group. So, it shows -I effect, By reducing the electron negative charge of the compound, it stabilises the compound. On the other hand, the methyl group is an electron donor group so it shows +I effect. This increases the negative charge on the compound and destabilises the compound.

Hence  O_{2}NCH_{2}CH_{2}O^{-}  is more stable than the CH_{2}CH_{2}O^{-}.

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