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Alkynes

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Alkynes

Reaction

Acidity

Synthesis

p-Bonds

Compound A, C9H12, absorbs 3 equivalents of H2 on catalytic reduction over palladium to give B, C9H18. On reaction with acidic KMnO4, compound A gives, among other things, a ketone that was identified as cyclohexanone. On treatment with NaNH2 in NH3, followed by addition of iodomethane, compound A gives a new hydrocarbon C, C10H14. What are the structures of A, B and C?