Reaction 1 proceeds by nucleophilic addition. Complete Fig. 4.2 to display the mechanism for making A from propanone, adding charges, dipoles, lone pairs of electrons and curly arrows where needed.
Explain why A cannot show optical isomerism.
Suggest the reagents and conditions required for reaction 2.
Reaction 3 is a reduction reaction. Construct an equation to represent reaction 3. Use $[\text{H}]$ to represent one atom of hydrogen from the reducing agent.
Name compound C.
State the observation in reaction 4.
Explain why propanone does not react with Fehling’s reagent.
Explain why the absorptions at $2850$-$2950\ \text{cm}^{-1}$ are not useful in deciding which of compounds A, B or C gives the infrared spectrum in Fig. 4.3. Use Table 4.1 to answer this question.
Identify which of compounds A, B or C gives the infrared spectrum in Fig. 4.3. Explain your answer.