JEE Main202430 Jan 2024Evening ShiftChemistryGeneral Organic ChemistryActual
The correct stability order of carbocations is
Options
- ACH 3 3 C + > CH 3 - C + H 2 > CH 3 2 C + H > C + H 3
- BC + H 3 > CH 3 2 C + H > CH 3 - C + H 2 > CH 3 3 C +
- CCH 3 3 C + > CH 3 2 C + H > CH 3 - C + H 2 > C + H 3
- D+ C H ₃ > CH ₃- + C H ₂ > CH ₃- | CH ₃ + C H > ( CH ₃ ) C ⁺
Correct answer
C. CH 3 3 C + > CH 3 2 C + H > CH 3 - C + H 2 > C + H 3
Step-by-step solution
CH 3 3 C + - Tertiary carbocation CH 3 2 C + H - Secondary carbocation CH 3 - C + H 2 - Primary carbocation C + H 3 - Methyl carbocation Stability of carbocations depends upon the electron releasing groups. The given carbocations stability can be explained by hyperconjugation effect. More the number of alpha hydrogen, more are number of hyperconjugation structures, hence, more is the stability of carbocation. Thus, the observed order of stability for carbocations is as follows: tertiary > secondary > primary > meth