If a aryl diazonium salt is treated with sulfur dioxide, what product forms?(a) Benzene sulfonic acid(b) Aryl Sulfonyl Chloride(c) Thiophenol(d) ThiopheneI had been asked this question in final exam.This interesting question is from P-Block Elements topic in chapter P-Block Elements of Chemistry – Class 12

If a aryl diazonium salt is treated with sulfur dioxide, what product

1.	If a aryl diazonium salt is treated with sulfur dioxide, what product forms?(a) Benzene sulfonic acid(b) Aryl Sulfonyl Chloride(c) Thiophenol(d) ThiopheneI had been asked this question in final exam.This interesting question is from P-Block Elements topic in chapter P-Block Elements of Chemistry – Class 12
Answer» Correct option is (b) Aryl SULFONYL Chloride The best explanation: When aryl DIAZONIUM SALTS are treated with SULFUR dioxide in presence of CuCl and acetic acid, it forms aryl sulfonyl chloride Diazonium salts are highly UNSTABLE intermediates due to the N≡N^+ bond.

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