Question

Hyperconjugation is most useful for stabilising which of the following carbocations?

• A. Neo-pentyl
• B. Tert-butyl
• C. Iso-propyl
• D. Ethyl

Answer 1

Answer: (B)

Tert-butyl

Stability order of different carbocations is given as

$3^0>2^0>1^0>methyl$

In tertiary butyl carbocation, the carbon atom is surrounded by 3 methyl groups and thus it will have maximum hyper conjugative structures which gives max. stability when compared to other secondary and primary carbocations