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

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryOrganic Chemistry: Some Basic Principles and Techniques1 Mark
MCQ
Electrophilic addition reactions proceed in two steps. The first step involves the addition of an electrophile. Name the type of intermediate formed in the first step of the following addition reaction.
$\text{H}_3\text{C}-\text{H}\text{C}=\text{CH}_2+\text{H}^+\rightarrow?$
  • A
    2° Carbanion
  • B
    1° Carbocation
  • C
    2° Carbocation
  • D
    1° Carbanion
✓

Answer

  1. 2° Carbocation

Explanation:

When the electrophile attacks CH3 – CH = CH2, delocalisation of electrons can take place in two possible ways

As 2° carbocation is more stable than 1° carbocation, the first addition is more feasible.

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