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Chemistry · PYQ NEET UG 2023

हिन्दी

Consider the following compounds/species:\ni. Naphthalene\nii. Cyclopentadienyl anion\niii. Cyclobutadiene\niv. Cyclopropenyl anion\nv. Cyclopropenyl cation\nvi. Cyclooctatetraene\nvii. Anthracene\nThe number of compounds/species which obey Huckel's rule is ____.

  1. 4
  2. 6
  3. 2
  4. 5

Correct answer · Option 1

4

Explanation

Huckel's rule requires (4n + 2) pi electrons and planarity. Naphthalene (10), Cyclopentadienyl anion (6), Cyclopropenyl cation (2), Anthracene (14) obey Huckel's rule (Total 4 species).
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