Asked in Premeth Test 15 — Organic Chemistry Concepts and Hydrocarbons (17 March 2025) 2025Moderate

Which of the following groups are most likely to be o, p directing

Correct answer: C. Activating

  • A. Deactivating
  • B. Neutral
  • C. Activating
  • D. All of these

Explanation

Activating groups are most likely to be ortho, para directing as they donate electrons to the benzene ring, increasing its reactivity. Deactivating and neutral groups do not have this effect, making them less likely to be o, p directing.

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About Benzene and Aromatic Compounds

Benzene has a planar ring of delocalised π electrons, giving aromatic stability and equal carbon-carbon bond lengths. The topic covers resonance, electrophilic substitution reactions such as nitration, halogenation, sulphonation and Friedel-Crafts reactions, along with substituent effects and the distinction between substitution in benzene and addition in ordinary alkenes.

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