MCQ
Identify product $(P)$
- A
- ✓
- C
- D
✓
Answer
Correct option: B.
b
The decrease of ring strain can provide a driving force strong enough to overcompensete for the conversion of a more stable into less stable cationic centre, the carbooxonium ion $(A)$ rearranges into the carbonium ion $(B)$ because of the release of cyclo butene strain $(2 6 \,kcal/mol)$ in the formation of the cyclopentane (ring strain of about $5\, cal/mol$) cation $B$ stablizer itself by way of another $1,2$ rearrangement. The resulting action $(c)$ has comparebly little ring strain but is an electronically favourable carboxonium ion.
The decrease of ring strain can provide a driving force strong enough to overcompensete for the conversion of a more stable into less stable cationic centre, the carbooxonium ion $(A)$ rearranges into the carbonium ion $(B)$ because of the release of cyclo butene strain $(2 6 \,kcal/mol)$ in the formation of the cyclopentane (ring strain of about $5\, cal/mol$) cation $B$ stablizer itself by way of another $1,2$ rearrangement. The resulting action $(c)$ has comparebly little ring strain but is an electronically favourable carboxonium ion.
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