Which of the following is the least stable carbocation?
Correct answer: B. CH3+
- A. R3C+
- B. CH3+
- C. R2CH+
- D. RCH2+
Explanation
The stability of carbocations is increased by electron-donating groups, such as alkyl groups, through inductive effects and hyperconjugation. The methyl carbocation (CH₃+) has no alkyl groups attached and is therefore the least stable. The order of stability is tertiary > secondary > primary > methyl.
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Organic chemistry begins with carbon compounds classified by carbon skeleton, saturation and functional group. Work includes identifying groups such as hydroxyl, carbonyl, carboxyl and amino, applying basic nomenclature, and distinguishing structural, geometric and optical isomers, where the same molecular formula does not necessarily mean the same structure or properties.
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