HardJEE PYQs
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'x' is the product which is obtained from benzene by reacting it with carbon monoxide and hydrogen chloride in the presence of cuprous chloride. 'y' is the major product obtained from benzene by reacting it with ethanoyl chloride in the presence of anhydrous AlCl₃. Product (major) obtained by heating x and y in the presence of alkali is z. Total number of π (pi) electrons in z is ________.
Explanation
x is benzaldehyde (Gattermann–Koch reaction). y is acetophenone (Friedel–Crafts acylation). On treatment with aqueous NaOH, benzaldehyde and acetophenone undergo crossed aldol condensation to give chalcone. Total number of π electrons in z = 16.
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