Chemistry - GOC Question with Solution | TestHub
ChemistryGOCBond Length, Strength, Cleavage, Rotational Energy BarrierMedium2 minQB
ChemistryMediumsingle choice
Correct order of indicated bond-length
Options:
Answer:
B
Solution:
Bond length is inversely proportional to bond order.
ℓ₁ is in 1,3-cyclohexadiene; due to conjugation, the indicated single bond gets partial double-bond character, so it becomes shorter than a normal C–C bond.
ℓ₂ is the single bond adjacent to a double bond in methyl cyclohexene; hyperconjugation gives slight partial double-bond character, so its length decreases slightly.
ℓ₃ is a normal C=C bond in cyclohexene and is the shortest.
Therefore, ℓ₁ > ℓ₂ > ℓ₃.
Stream:JEESubject:ChemistryTopic:GOCSubtopic:Bond Length, Strength, Cleavage, Rotational Energy Barrier
⏱ 2mℹ️ Source: QB
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