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CAIE A-Level Chemistry 32.2.1 Preparing Phenol from Phenylamine

Practise the two-step phenylamine-to-phenol route with correct diazotisation reagents and temperature control.

Syllabus
2028–2030
Course
Chemistry 9701
Level
A2

Exam points

  • react phenylamine with HNO2, or NaNO2 and dilute acid, while keeping the temperature below 10°C
  • identify the benzenediazonium salt as the intermediate formed in the cold first step
  • warm the diazonium salt with water to replace the diazonium group by OH and form phenol

32.2.1—Preparation of phenol question 1

[Maximum number: 2]

Compound T,C5H9O2Cl\mathbf{T}, \mathrm{C}_{5} \mathrm{H}_{9} \mathrm{O}_{2} \mathrm{Cl}, is a useful synthetic intermediate.

Fig. 8.1 shows some reactions of T.

Fig. 8.1

Fig. 8.1

State the reagents and conditions for steps 1 and 2 in Fig. 8.1.
step 1
step 2

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