COMEDK2023Evening ShiftChemistryGeneral Organic ChemistryActual
Which one of the following statements is correct?
Options
- AIn CH ₃⁻ , Carbon carrying negative charge is sp ^2 hybridised.
- BThe order of stability of Carbanions is C ₆ H ₅ CH ₂⁻< ( C ₆ H ₅ )₂ CH ⁻< ( C ₆ H ₅ )₃ C ⁻
- CThe order of stability of Carbocations is ( C ₆ H ₅)₃ C ⁺<( C ₆ H ₅)₂ CH ⁺< C ₆ H ₅ CH ₂⁺
- DIn CH ₃ ⁺ , Carbon carrying positive charge is sp ^3 hybridised.
Correct answer
B. The order of stability of Carbanions is C ₆ H ₅ CH ₂⁻< ( C ₆ H ₅ )₂ CH ⁻< ( C ₆ H ₅ )₃ C ⁻
Step-by-step solution
In CH ₃⁻ , the carbon atom is bonded to three hydrogen atoms and has one lone pair. The steric number is 3 + 1 = 4 , which corresponds to sp ^3 hybridisation. Thus, option (1) is incorrect. In CH ₃⁺ , the carbon atom is bonded to three hydrogen atoms and has no lone pair. The steric number is 3 + 0 = 3 , which corresponds to sp ^2 hybridisation. Thus, option (4) is incorrect. For carbocations, the stability increases with the number of phenyl groups due to resonance stabilization. The order is C ₆ H ₅ CH ₂⁺ For car