NTA Abhyas JEE Main2020ChemistryGeneral Organic ChemistryPractice
Consider the following substances The decreasing order of basicity is
Options
- A2 > 1 > 3 > 4
- B1 > 2 > 3 > 4
- C1 > 3 > 2 > 4
- D3 > 1 > 2 > 4
Correct answer
D. 3 > 1 > 2 > 4
Step-by-step solution
The decreasing order of basicity is 3 > 1 > 2 > 4. The β -carbon in uses s p 3 -hybrid orbitals; while the β -carbon in benzylamine uses s p 2 -hybrid orbitals. The electron-withdrawing p - C N makes the phenyl ring even more electron-withdrawing and base-weakening.