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Question:

(a) Write the structures of A and B in the following reactions:
(i) CH3COCl + H2, Pd-BaSO4 → A + H2N-OH → B
(ii) CH3MgBr + 1. CO2 → 2. H2O + A + PCl5 → B
(B) Distinguish between:
(i) C6H5-COCH3 and C6H5-CHO
(ii) CH3COOH and HCOOH
(c) Arrange the following in the increasing order of their boiling points: CH3CHO, CH3COOH, CH3CH2OH

Solution:

(a) (i) CH3COCl + H2, Pd-BaSO4 → CH3CHO + H2N-OH → CH3C=(N-OH)H
(ii) CH3MgBr + 1. CO2 → 2. H2O + CH3COOH + PCl5 → CH3COCl
(B) (i) Acetophenone, C6H5-COCH3 and Benzaldehyde C6H5-CHO
(ii) CH3COOH, acetic acid and HCOOH, propanoic acid
(c) CH3CHO < CH3CH2OH < CH3COOH