Answer to Question #142371 in Organic Chemistry for Frederick Martinez

Question

Why is 1,3-hexadeine aromatic?

Answer 1

The increase in stability of 2,4-hexadiene over 1,3-hexadiene (both are conjugated) is due to the increased double bond substitution of the former, a factor noted earlier for simple alkenes. The stabilization of dienes by conjugation is less dramatic than the aromatic stabilization of benzene