Chemistry - GOC Question with Solution | TestHub
ChemistryGOCRESONANCE AND MESOMERIC EFFECTMedium2 minQB
ChemistryMediumsingle choice
Arrange the ortho (I), meta (II) and para (III) nitrobenzyl carbocations in decreasing order of stability.
(I) 
(II) 
(III) 
Options:
Answer:
A
Solution:
NO₂ is a -I and -M group, so it destabilises a benzylic cation. The -M effect works only from the ortho and para positions, so the meta isomer (only -I) is the least destabilised.
Between ortho and para, the -I effect falls with distance, so it hurts the ortho cation more.
Order : II III I.
Stream:JEESubject:ChemistryTopic:GOCSubtopic:RESONANCE AND MESOMERIC EFFECT
⏱ 2mℹ️ Source: QB
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