Question

Question 13.11 What are the necessary conditions for any system to be aromatic?

Class XI Hydrocarbons Page 397

Answer 1

The necessary conditions for any system to be aromatic :
1. compound should be planar. This is because of complete delocalization of π - electrons is possible only if the ring is planar to allow cyclic overlap of p - orbitals .

2. it should have a single cyclic cloud of delocalized π - electrons above and below the plane of the molecule.

3. it should contains 'Huckel numbers of electrons ' e.g., (4n + 2) π electrons where n is integers .

if A molecule which doesn't satisfy any one of the above conditions is said to be non - aromatic .