Acetylene is passed through red hot iron tube at 873 K to produce P. P reacts with chlorine gas in the presence of anhydrous AlCl ₃ to produce Q. Q reacts with benzyl chloride and sodium to produce R as the major product. The structure of R

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Acetylene is passed through red hot iron tube at 873 K to produce P. P reacts with chlorine gas in the presence of anhydrous AlCl ₃ to produce Q. Q reacts with benzyl chloride and sodium to produce R as the major product. The structure of R is:

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Formation of P When acetylene ( HC CH ) is passed through a red hot iron tube at 873 K , it undergoes cyclic polymerization to form benzene ( C₆H₆ ). 3HC CH red hot Fe tube, 873 K C₆H₆ (Benzene, P) Formation of Q Benzene reacts with chlorine gas in the presence of anhydrous AlCl ₃ (a Lewis acid) to undergo electrophilic aromatic substitution, yielding chlorobenzene ( C₆H₅Cl ). C₆H₆ + Cl₂ anhydrous AlCl₃ C₆H₅Cl (Chlorobenzene, Q) + HCl Formation of R Chlorobenzene (Q) reacts with benzyl chloride ( C₆H₅CH₂Cl ) and so

Acetylene is passed through red hot iron tube at 873 K to produce P. P reacts with chlorine gas in the presence of anhydrous AlCl ₃ to produce Q. Q reacts with benzyl chloride and sodium to produce R as the major product. The structure of R is:

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