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CAIE A-Level Chemistry AS 19.1.1 Preparation of Amines Questions

Practise CAIE 9701 preparation of primary amines by heating a halogenoalkane with excess ammonia in ethanolic solution under pressure.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • choose NH3 in ethanol with heat under pressure for nucleophilic substitution of a halogenoalkane
  • write the equation using two NH3 molecules to form the amine and an ammonium halide
  • use excess ammonia to favour the primary amine while recognising further substitution can occur

CAIE A-Level Chemistry AS 19.1.1 Preparation of Amines Questions question 1

[Maximum number: 1]

The structure of coniine is shown.

Figure for Question CAIE A-Level Chemistry AS 19.1.1 Preparation of Amines Questions question 1 — CAIE A-Level Chemistry AS

Coniine can be synthesised by reacting ammonia with a dibromo compound, X .

XNH3+C8H16Br2→ coniine +2HBr\begin{gathered} \mathrm{X} \\ \mathrm{NH}_{3}+\mathrm{C}_{8} \mathrm{H}_{16} \mathrm{Br}_{2} \rightarrow \text { coniine }+2 \mathrm{HBr} \end{gathered}

What is compound X ?

A

1,1-dibromo-2-propylcyclopentane

B

1,2-dibromo-2-propylcyclopentane

C

Br(CH2)3CHBr(CH2)3CH3\mathrm{Br}\left(\mathrm{CH}_{2}\right)_{3} \mathrm{CHBr}\left(\mathrm{CH}_{2}\right)_{3} \mathrm{CH}_{3}

D

Br(CH2)4CHBr(CH2)2CH3\mathrm{Br}\left(\mathrm{CH}_{2}\right)_{4} \mathrm{CHBr}\left(\mathrm{CH}_{2}\right)_{2} \mathrm{CH}_{3}

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