Chemistry - GOC Question with Solution | TestHub
ChemistryGOCAromaticityMedium2 minQB
ChemistryMediumsingle choice
Why is [18]annulene more stable than [14]annulene ?
(a) 
(b) 
Options:
Answer:
A
Solution:
Both rings have 4n + 2 π electrons (14 and 18). [14]Annulene has four inner H atoms that clash and force the ring out of plane. [18]Annulene has six inner H atoms spread around a much larger ring, so they do not clash and the ring is nearly planar and fully aromatic.
Stream:JEESubject:ChemistryTopic:GOCSubtopic:Aromaticity
⏱ 2mℹ️ Source: QB
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