An organic compound (A) reacts with PCl to produce another compound (B).(B) reacts withmagnesium metal in presence of ether to produce a Grignard reagent (C).(C) reacts with ethanal and theproduct is hydrolysed to produce propan-2-ol.Identify (A),(B) and (C) and explain the reactions

(A) is an alcohol, specifically ethanol. (B) is ethyl chloride, and (C) is an ethylmagnesium chloride Grignard reagent.

Here are the reactions:

1. Ethanol (A) reacts with PCl5 to produce ethyl chloride (B) and HCl. This is a substitution reaction where the -OH group in ethanol is replaced by a Cl atom.

   CH3CH2OH + PCl5 → CH3CH2Cl + HCl

2. Ethyl chloride (B) reacts with magnesium metal in the presence of ether to produce an ethylmagnesium chloride Grignard reagent (C). This is a Grignard reaction, where the magnesium atom inserts itself between the carbon and the halogen in the alkyl halide.

   CH3CH2Cl + Mg → CH3CH2MgCl

3. The Grignard reagent (C) reacts with ethanal to produce a tertiary alcohol. This is a nucleophilic addition reaction, where the Grignard reagent attacks the carbonyl carbon of the aldehyde.

   CH3CH2MgCl + CH3CHO → CH3CH(OH)CH3

4. The product is then hydrolysed to produce propan-2-ol. This is a simple acid-base reaction, where the alkoxide ion (the conjugate base of the alcohol) is protonated by a water molecule to form the alcohol.

   CH3CH(OH)CH3 + H2O → CH3CH(OH)CH3 + OH-