A-LevelChemistryHydrocarbons9701/12 · May/June 2012 · Q231 Mark

Isomers X and Y both react with HBr. [Figure 23.1] A mixture of X and Y is reacted with HBr. Which three structures represent three different possible products of this reaction?

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A(CH3)2CHCBr3 (CH3)2CBrCHBr2 CH3CHBrCHBrCH3

B(CH3)2CHCBr3 (CH3)2CBrCHBr2 CH3CBr2CHBrCH3

C(CH3)2CBrCBr3 (CH3)2CHCBr3 CH3CBr2CHBrCH3

D(CH3)2CBrCHBr2 CHBr2CBr(CH3)CH3 CH3CHBrCBr2CH3

✓ Correct answer

B: (CH3)2CHCBr3 (CH3)2CBrCHBr2 CH3CBr2CHBrCH3

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Topic: Hydrocarbons, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2012 Paper 1 Variant 2, question 23.

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