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Carbon–carbon bond formation: OCR A‑Level Chemistry A questions

Every OCR A-Level Chemistry A exam question on 6.2.4 Carbon–carbon bond formation, 2016–2025, with its mark scheme and examiner’s report.

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1,820 questions

  1. Q19(a)(i)

    June 2025 · Paper 2

    3 marks6.2.4 Carbon–carbon bond formation
    The whole paper ↗
    June 2025 Paper 2, question 19(a)(i): Outline the mechanism for the reaction of 2-bromopropane with cyanide ions. Show curly arrows, relevant dipoles and products. Br [3]

  2. Q19(a)(ii)

    June 2025 · Paper 2

    1 mark6.2.4 Carbon–carbon bond formation
    The whole paper ↗
    June 2025 Paper 2, question 19(a)(ii): Name this type of mechanism. [1]

  3. Q18(b)

    June 2024 · Paper 2

    9 marks6.2.4 Carbon–carbon bond formation6.2.1 Amines
    The whole paper ↗
    June 2024 Paper 2, question 18(b): Complete the flowchart by filling in each box. amine reagent(s) reagent(s) H H3C C Br H bromoethane alcohol reagent(s) H H3C C C N H nitrile reagent(s) reagent(

  4. Q21

    June 2022 · Paper 2

    6 marks6.2.4 Carbon–carbon bond formation
    The whole paper ↗
    June 2022 Paper 2, question 21: 21* Carbon-carbon bond formation is used in synthesis to increase the length of a carbon chain. Describe the formation of carbon–carbon bonds in aliphatic compo

  5. Q19(b)

    November 2021 · Paper 2

    6 marks6.2.4 Carbon–carbon bond formation6.2.5 Organic synthesis
    The whole paper ↗
    November 2021 Paper 2, question 19(b): This question is about organic synthesis. (b)* A student intends to synthesise compound A using the two-stage route below. O Stage 1 Stage 2 CH2 Cl Intermediate

  6. Q15

    June 2018 · Paper 2

    1 mark6.2.4 Carbon–carbon bond formation
    The whole paper ↗
    June 2018 Paper 2, question 15: Which of the following could react with the compound below to form a carbon–carbon bond? H O C C OH Br 1 CH3Cl and Al Cl3 2 KCN in ethanol 3 CH3OH and H2SO4 A 1

  7. Q18(a)(i)

    June 2017 · Paper 2

    3 marks6.2.4 Carbon–carbon bond formation
    The whole paper ↗
    June 2017 Paper 2, question 18(a)(i): 1-Chloropropane, CH3CH2CH2Cl, reacts with ethanolic sodium cyanide by nucleophilic substitution. Outline the mechanism for this reaction. Include curly arrows,

  8. Q18(a)(ii)

    June 2017 · Paper 2

    3 marks6.2.4 Carbon–carbon bond formation
    The whole paper ↗
    June 2017 Paper 2, question 18(a)(ii): Compound G is used to synthesise compounds H and I as shown in the flowchart below. Complete the flowchart showing the structure of compound G and the formulae
All 8 questions on Carbon–carbon bond formation, as a list
  1. June 2025, Paper 2, Q19(a)(i) (3 marks): Outline the mechanism for the reaction of 2-bromopropane with cyanide ions. Show curly arrows, relevant dipoles and products. Br [3]
  2. June 2025, Paper 2, Q19(a)(ii) (1 mark): Name this type of mechanism. [1]
  3. June 2024, Paper 2, Q18(b) (9 marks): Complete the flowchart by filling in each box. amine reagent(s) reagent(s) H H3C C Br H bromoethane alcohol reagent(s) H H3C C C N H nitrile reagent(s) reagent(
  4. June 2022, Paper 2, Q21 (6 marks): 21* Carbon-carbon bond formation is used in synthesis to increase the length of a carbon chain. Describe the formation of carbon–carbon bonds in aliphatic compo
  5. November 2021, Paper 2, Q19(b) (6 marks): This question is about organic synthesis. (b)* A student intends to synthesise compound A using the two-stage route below. O Stage 1 Stage 2 CH2 Cl Intermediate
  6. June 2018, Paper 2, Q15 (1 mark): Which of the following could react with the compound below to form a carbon–carbon bond? H O C C OH Br 1 CH3Cl and Al Cl3 2 KCN in ethanol 3 CH3OH and H2SO4 A 1
  7. June 2017, Paper 2, Q18(a)(i) (3 marks): 1-Chloropropane, CH3CH2CH2Cl, reacts with ethanolic sodium cyanide by nucleophilic substitution. Outline the mechanism for this reaction. Include curly arrows,
  8. June 2017, Paper 2, Q18(a)(ii) (3 marks): Compound G is used to synthesise compounds H and I as shown in the flowchart below. Complete the flowchart showing the structure of compound G and the formulae

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