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Hyperconjugation
Concepts tested here
- Alpha-hydrogens and hyperconjugation
All Questions
2015 AIPMT-I 1 question
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Consider the following compounds
Hyperconjugation occurs in:Hyperconjugation needs $\alpha$-H atoms on a carbon attached to the radical carbon.
In I the radical carbon is attached to a quaternary carbon and a phenyl group (no $\alpha$-H); in II it carries three phenyl groups (no $\alpha$-H).
Only III has $\alpha$-H, so hyperconjugation occurs in III only.