Question

Resonance energy of benzene is much more higher than 1,3-butadiene. why?

Answer 1

Hey,
Thanks for asking this question.


Benzene is more stable than 1,3 butadiene due to more number of resonance contributing structure and shows the high resonance energy value because the difference of heat between benzene & it's contributing structure is higher than 1,3 butadiene.

Benzene has resonance energy = 151 kJmol-1 whereas 1,3-butadiene has an energy approximately 21 kJmol-1.

Answer 2

Hey dear,

● Explanation -
- The resonance energy of a compound is a measure of the extra stability of the conjugated system compared to the corresponding number of isolated double bonds.
- Benzene shows delocalization of electrons over ring structure.
- 1,3-Butadiene also shows delocalization of electrons over double bonds.
- But benzene shows more resonance structures than 1,3-butadiene.
- Therefore, benzene has high resonance energy as compared to that of 1,3-butadiene.

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