SELECT * FROM question_mgmt as q WHERE id=3102 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=2 AND subId=9 AND chapterId=53 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED)

Question:

Which of the two: OO2NCH2CH2O-   or   CH3CH2O- is expected to be more stable and why?

Answer:

NO2 group is an electron-withdrawing group. Hence, it shows -I effect. NO2 group decreases the negative charge on the compound by withdrawing electrons towards it and stabilising it. On the other hand, ethyl group is an electron-releasing group. Hence, the ethyl group shows +I effect. This increases the negative charge on the compound, thereby destabilising it. Hence, O2NCH2CH2O- is expected to be more stable than CH3CH2O-.


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