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CAIE A-Level Chemistry AS 19.2.1 Preparation of Nitriles Questions

Practise CAIE 9701 preparing nitriles by heating a halogenoalkane with potassium cyanide in ethanol, including the extra carbon from CN−.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • select KCN in ethanol with heat for nucleophilic substitution of the halogen by CN
  • draw the nitrile with one additional carbon because the carbon atom of CN− joins the chain
  • distinguish the –C≡N connectivity of a nitrile from an isocyanide arrangement

CAIE A-Level Chemistry AS 19.2.1 Preparation of Nitriles Questions question 1

[Maximum number: 1]

Compounds P and Q are structural isomers.

Fig. 4.1

Fig. 4.1

Fig. 4.3 shows a synthesis starting from T, a different isomer of R and S.

Fig. 4.3

Fig. 4.3

Identify the reagent and conditions for reaction 1.

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