A-LevelChemistryHydrocarbons9701/12 · Feb/Mar 2023 · Q391 Mark
Cyclohexa-1,4-diene is treated with a solution of bromine in tetrachloromethane in the dark. [Figure 39.1: Structure of cyclohexa-1,4-diene.] Which product is formed?
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ACyclic six-membered ring with two Br on adjacent carbons and one double bond remaining. (1,2-dibromocyclohex-4-ene)
BCyclic six-membered ring with four Br atoms, all single bonds. (1,2,4,5-tetrabromocyclohexane)
CCyclic six-membered ring with two Br atoms on carbons separated by one carbon, and one double bond remaining. (1,4-dibromocyclohex-2-ene)
DCyclic six-membered ring with four Br atoms on adjacent carbons, all single bonds. (1,2,3,4-tetrabromocyclohexane)
✓ Correct answer
B: Cyclic six-membered ring with four Br atoms, all single bonds. (1,2,4,5-tetrabromocyclohexane)
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