Chemistry - GOC Question with Solution | TestHub
ChemistryGOCRESONANCE AND MESOMERIC EFFECTEasy2 minQB
ChemistryEasysingle choice
Which of the following compounds is not resonance stabilized ?
(A) 
(B) 
(C) 
(D) 
Options:
Answer:
C
Solution:
(B) is an enolate and (D) is an allyl anion, both stabilized by resonance.
In (C) the carbanion is at a bridgehead. A bridgehead carbon cannot become sp² and planar (Bredt's rule), so its lone pair cannot overlap with C=O. No resonance.
(A) is a conjugated enone and is stabilised by resonance.
Stream:JEESubject:ChemistryTopic:GOCSubtopic:RESONANCE AND MESOMERIC EFFECT
⏱ 2mℹ️ Source: QB
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