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In the presence of a strong electrophile, which position on a disubstituted benz

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Question: In the presence of a strong electrophile, which position on a disubstituted benzene ring will a third substituent most likely attach?

Options:

  1. Ortho
  2. Meta
  3. Para
  4. Random

Correct Answer: Ortho

Solution: 

The position of the third substituent depends on the nature of the existing substituents; however, ortho and para positions are generally favored for activating groups.

In the presence of a strong electrophile, which position on a disubstituted benz

Practice Questions

Q1
In the presence of a strong electrophile, which position on a disubstituted benzene ring will a third substituent most likely attach?
  1. Ortho
  2. Meta
  3. Para
  4. Random

Questions & Step-by-Step Solutions

In the presence of a strong electrophile, which position on a disubstituted benzene ring will a third substituent most likely attach?
  • Step 1: Identify the existing substituents on the disubstituted benzene ring.
  • Step 2: Determine if the existing substituents are activating or deactivating groups.
  • Step 3: If the existing substituents are activating groups (like -OH or -NH2), the third substituent will likely attach at the ortho or para positions.
  • Step 4: If the existing substituents are deactivating groups (like -NO2 or -CF3), the third substituent will likely attach at the meta position.
  • Step 5: Consider the strength of the electrophile; a strong electrophile will favor the positions that are more accessible.
  • Electrophilic Aromatic Substitution – The reaction of a benzene ring with an electrophile, where the position of substitution is influenced by existing substituents.
  • Activating and Deactivating Groups – Substituents that either increase (activating) or decrease (deactivating) the electron density of the benzene ring, affecting the position of new substituents.
  • Ortho/Para vs. Meta Directing – Understanding how different substituents direct new substituents to ortho, para, or meta positions based on their electronic effects.
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