The compound with molecular formula C₆H₆, which gives only one monobromo derivative and takes up four moles of hydrogen per mole for complete hydrogenation has ________ π electrons.

Question

Dr. Abubacker · Accepted Answer

[Solution by Dr. Abubacker] Benzene would take only three moles of H₂. A compound C₆H₆ taking up four moles must have two triple bonds, and giving only one monobromo derivative needs a single type of hydrogen: CH₃–C≡C–C≡C–CH₃ (hexa-2,4-diyne). Two triple bonds contain four π bonds, i.e. 8 π electrons. Answer: 8.

Q. The compound with molecular formula C₆H₆, which gives only one monobromo derivative and takes up four moles of hydrogen per mole for complete hydrogenation has ________ π electrons.

Explanation

Reviewed by Dr. Abubacker

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