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MHT CET202613 April 2026Evening ShiftChemistryGeneral Organic ChemistryActual

Among the following, the most stable carbocation is

Options

  1. ACH ₃^+
  2. B( CH ₃)₂ CH ^+
  3. CCH ₃ -CH ₂^+
  4. D( CH ₃)₃ C ^+

Correct answer

D. ( CH ₃)₃ C ^+

Step-by-step solution

The stability of carbocations increases with the increase in the number of alkyl groups attached to the positively charged carbon atom. This is due to the +I (inductive) effect and hyperconjugation. The order of stability of alkyl carbocations is 3^ > 2^ > 1^ > methyl . Among the given options, ( CH ₃)₃ C ^+ is a tertiary ( 3^ ) carbocation, which has nine -hydrogen atoms, leading to maximum hyperconjugation structures. Hence, it is the most stable carbocation. Answer: ( CH ₃)₃ C ^+

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