Concept Interpretation- To determine the stability of given structures.
Introduction −
Stability of the given structure can be explained on the basis resonance.
Resonance is delocalization of electrons occurs within the molecule which makes the molecules less reactive and more stable.
Resonance can be seen in molecules having alternate double and single bonds.
Explanation of Solution
First structure has one double bond in the ring; hence it cannot show resonance.
The second structure has three double bonds at alternate position in a ring, it will show resonance and becomes stable.
The third structure has two double bonds but not alternate, hence it will not show resonance.
On this basis, second molecule is expected to be most stable.
Chapter 22 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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