JEE Main2013ChemistryGeneral Organic ChemistryActual
The order of stability of the following carbocations:
Options
- AI > II > III
- BIII > I > II
- CIII > II > I
- DII > III > I
Correct answer
B. III > I > II
Step-by-step solution
CH 2 = CH - C ⊕ H 2 ↔ C ⊕ H 2 - CH = CH 2 (I) (Stabilised by delocalisation ( 2 eq. R.S.) ) CH 3 - CH 2 - C ⊕ H 2 (II) (Stabilised by only + I & hyperconjugation)(2 conjugated C-H) III is stabilised by maximum delocalisation ( 4 R.S.) The order of stability is III > I > II Order of stability is: