If canonical structures are hypothetical, how do they contribute to the stability of the resonance hybrid?
Asked by aayush
22nd December 2017,
12:54 PM
Answered by Expert
Answer:
According to Robinson and Ingold when for a molecule like benzene, two or more structures are required to explain all the properties of a molecule, then the actual structure of the compound is not represented by any of them; but it is a hypothetical structure which lies between them.
This phenomenon is known as resonance and the hypothetical structure is called a resonance hybrid.
These different structures are known as canonical forms or limiting structure or contributing structures.
Resonance structures only exist on paper.
No. of Π bonds 
No. of contributing structures Resonance energy Stability.
No. of contributing structures Resonance energy Stability.
Answered by Expert
22nd December 2017,
2:28 PM
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