Engineering
Chemistry
Preparation of phenol
Benzyne
Other reactions of aromatic compounds
Question

In Dow's process for the manufacture of phenol, PhCl is fused with NaOH at elevated temperature under pressure.
PhCl623K,300atmNaOH[Intermediate]H2OPhenol(A)+(B)+(C) side product
Which of the following statements are correct?

Phenol is formed via the formation of benzyne intermediate
p-phenyl phenol is also formed as a by-product
Diphenylether is also formed as a by-product
Biphenylene is also formed as a by-product
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Solution
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PhCl + NaOH given phenol as the major product

After the formation of benzyne, OH nucleophilic attack takes place. the reaction mixture also contains some phenoxide ions. So Diphenyl ether is a possible side product. 

Third by product is shown in the figure.