Consider the following reaction, and choose the correct option. [figure]
- Compound P is obtained by the hydrogenation of benzoyl chloride with Pd on BaSO4
- On treating compound P with saturated NaHCO3 solution, brisk effervescence is observed
- Compound P can be prepared by treating benzene with anhydrous AlCl3 and CH3COCl
- On treating with bromine water, compound P gives a white precipitate
Answer
(1) Compound P is obtained by the hydrogenation of benzoyl chloride with Pd on BaSO4
Solution
In the Étard reaction, oxidation of toluene with chromyl chloride (CrO2Cl2) in CS2 followed by hydrolysis yields benzaldehyde as compound P:
C6H5CH3 [ii. H3O+]i. CrO2Cl2, CS2 C6H5CHO (P)
Rosenmund reduction of benzoyl chloride with H2/Pd-BaSO4 also yields benzaldehyde:
C6H5COCl + H2 Pd/BaSO4 C6H5CHO + HCl
Therefore, compound P is obtained by the hydrogenation of benzoyl chloride with Pd on BaSO4.
Answer: (1)