Identify major product "X" formed in the following reaction : [figure]
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Answer
(1) [figure]
Solution
This is the Gattermann–Koch reaction: CO + HCl with anhydrous AlCl3/CuCl gives the formyl cation H +C=O, which formylates benzene.
C6H6 + CO [anhyd. AlCl3/CuCl]HCl C6H5CHO
Hence X is benzaldehyde.
Answer: (1)