QuestionCarbocation rearrangements / ring contraction
The major product formed in the following reaction is
- (a) hydrindane with 1-isopropylcyclopentene unit (ring-contracted, endocyclic C=C)
- (b) hydrindane with exocyclic isopropylidene on the five-membered ring (ring-contracted)
- (c) octalin with tetrasubstituted ring C=C bearing two methyls (methyl shift)
- (d) octalin with trisubstituted ring C=C and gem-methyl migrated (methyl shift)
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