Q.
The carbocation below undergo favourable rearrangement. How many hyperconjugation structure exist in the most stable carbocation obtained after rearrangement?
Organic Chemistry – Some Basic Principles and Techniques
Solution:
Ethyl shift would be preferred over methyl shift as former would leave $7 \alpha-H$ to positively charged carbon while later would leave only $6 \alpha-H$ to positively charged carbon as:
