NTA Abhyas JEE Main2020ChemistryGeneral Organic ChemistryPractice
Among the pair of ions given below, for which pair, first ion is more stable than second?
Options
- AC H 3 - C H ⊕ - C H 3 and C H 3 - C H ⊕ - O C H 3
- BC H 3 - C H 2 - C H ⊕ - C H 3 and C H 2 = C H - C H 2 - C H 2 ⊕
- Cand
- Dand
Correct answer
B. C H 3 - C H 2 - C H ⊕ - C H 3 and C H 2 = C H - C H 2 - C H 2 ⊕
Step-by-step solution
(i) II > I CH 3 − CH ⊕ − O − CH 3 ↔ CH 3 − CH = O ⊕ − CH 3 After resonance octet will complete in that compound (ii) I > II I → α H = 5 I I → α H = 2 I is more the stability of the compound (iii) II > I II is more stable due to resonance (iv) II > I Due to octet complete after resonance in the compound.