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Hydrocarbons — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryHydrocarbons5 Marks
Question
What are the necessary conditions for any system to be aromatic?
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Answer

The necessary and sufficient condition for any system to be aromatic is given by Huckel's rule. As per Huckel's rule, any system is said to be aromatic if it satisfies the following 3 conditions:
  1. Contains (4n + 2)71 electrons, where n is any positive integer or 0,
  2. Shows complete delocalisation of $\pi$ electrons and
  3. The molecule must be planar.

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