is 3 option is correct????
Answers
Question :
Find the products Formed in the final step of the following series reactions.
Aniline+ NaNO2 +HCl →A
A + HBF4 →B
B+ heat →Product
Theory :
Diazotization:
The process of converting of a primary aromatic amines into its diazonium salt by treatment with nitrous acid is called as diazotization.
C6H5NH2+NaNO2+→benzenediazonium chloride
⇒Benzenediazonium chloride is extremely useful synthetically.
⇒It is used in the preparation of many organic compounds.
Solution :
First step of reaction :
Aniline reacts with sodium NaNO2 and HCl at 0-5° C to form benzene diazonium chloride.
⇒Reaction as follows:
C6H5NH2+NaNO2+→benzenediazonium chloride
Second step of reaction, Benzenediazonium chloride reacts with hydrofluoroboric acid to produce fluoborate.
⇒Reaction as Follows:
C6H5-N2-Cl + HBF4 →C6H5-N2-BF4
Third step of reaction :
Fluoborate on thermal distortion results in the formation of fluorobenzene.
⇒Reaction as follows :
C6H5-N2-BF4 + heat → C6H5-F+ BF3+ N2
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Therefore : Final products are fluorobenzene ,BF3 and N2
