(a)
Interpretation:
The mechanism for the given reaction is to be proposed.
Concept introduction:
The 1H NMR signal exhibits one signal at 7.3 ppm. This indicates the structure to be highly symmetric and the protons to be
(b)
Interpretation:
Mechanism including transition state for the given reaction is to be proposed.
Concept introduction:
The 1H NMR signal exhibits one signal at 7.3 ppm. This indicates the structure to be highly symmetric and the protons to be aromatic.
(c)
Interpretation:
Explain why the reaction proceeds through mild temperature.
Concept introduction:
This reaction goes via cyclic transition state, with 4 π electrons cyclically delocalized, making it antiaromatic transition state.
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