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Organic Chemistry: Some Basic Principles and Techniques — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryOrganic Chemistry: Some Basic Principles and Techniques1 Mark
MCQ
Which of the following carbocation is most stable?
  • A
    $\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ + \\ (\text{CH}_3)_3\text{C}.\text{CH}_2$
  • ✓
    $\ \ \ \ \ \ \ \ \ \ \ + \\ (\text{CH}_3)_3\text{C}$
  • C
    $\ \ \ \ \ \ \ \ \ \ \ \ \ \ + \\ \text{CH}_3\text{CH}_2\text{CH}_2$
  • D
    $\ \ \ \ \ \ \ + \\ \text{CH}_3 \text{CH CH}_2\text{CH}3$
✓

Answer

Correct option: B.
$\ \ \ \ \ \ \ \ \ \ \ + \\ (\text{CH}_3)_3\text{C}$
$\ \ \ \ \ \ \ \ \ \ \ + \\ (\text{CH}_3)_3\text{C}$ is a tertiary carbocation. A tertiary carbocation is the most stable carbocation due to the electron releasing effect of three methyl groups. An increased $+\ I$ effect by three methyl groups stabilizes the positive charge on the carbocation.

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