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1 markFunctional Group Analysis, Reactions and Mechanisms

CAPE Chemistry Unit 2 · May/June 2023 · Paper 2 · Question 1(d)(iv)

A reaction scheme involving compounds A, B, C, D, E, and reagents I, II is provided.

Based on your response in (d) (ii), what colour is observed for the conversion of Compound B to Compound C?

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Other parts of this question

  1. 1(a)Give the IUPAC name for Compound A whose molecule is shown below.[1 mark]
  2. 1(b)(i)A hydrocarbon with molecular formula C₆H₁₄ is known to have five structural isomers. Draw the structures for EACH of these isomers in the space provided below.[5 marks]
  3. 1(b)(ii)State the IUPAC names of any TWO isomers in (b) (i).[2 marks]
  4. 1(c)(i)Write the IUPAC names of the geometrical isomers B and C shown below.[2 marks]
  5. 1(c)(ii)Compound B in (c) (i) reacts with HBr to yield Markovnikov product D as an equal mixture of two optical isomers. Define the term 'optical isomer'.[2 marks]
  6. 1(c)(iii)Draw the structures of the TWO optical isomers obtained in (c) (ii).[2 marks]
  7. 1(c)(iv)State the colour change observed when Compound C in (c) (i) reacts with Br₂.[2 marks]
  8. 1(d)(i)Name the functional groups highlighted in the compounds labelled A, B and C in the scheme above.[3 marks]
  9. 1(d)(ii)Identify the reagents I and II in the scheme above.[2 marks]
  10. 1(d)(iii)Identify the colour change observed when Compound A is converted to Compound B.[2 marks]
  11. 1(d)(v)Draw the structures of Compound D and Compound E in the space provided below.[2 marks]
  12. 1(d)(vi)Name the reaction used to form Compound E.[1 mark]
  13. 1(d)(vii)Give the reaction mechanism for EACH of the steps in going from Compound A to Compound E, using curved arrows to show the movement of electrons.[3 marks]

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