When ethanol is treated with benzene diazoniumchloride it forms:a)Arenesb)Ethyl alcoholc)Aminesd)MethaneCorrect answer is option 'A'. Can you explain this answer?

Question

Answer

The correct answer is option A
When C₂H₅OH (ethanol) is treated with C₆H₅N₂Cl it forms benzene.
Some mild reducing agents like C₂H₅OH themselves get oxidized to ethanol after reducing C₆H₅N₂Cl to benzene.

Answer

Because ethanol is a mild reducing agent and they themselves get oxidised to ethanal . hence the reaction is as follows ArN2Cl + CH3CH2OH________ ArH +N2 +CH2CHO + HCl(where Ar is an aromatic group)So the answer is arenes only

Answer

When ethanol is treated with benzene diazonium chloride, it forms arenes. Let's break down the reaction and understand why this is the correct answer.

Relevant Concepts:
1. Diazonium salts: These are compounds that contain the diazonium group (-N2+X-), where X can be a halide or any other anion. Diazonium salts are highly reactive and are commonly used in various organic reactions.
2. Sandmeyer reaction: This is a class of reactions that involve the conversion of a diazonium salt into an aryl halide or an aryl cyanide by the substitution of the diazonium group with another functional group.

Reaction Mechanism:
1. Formation of the diazonium salt: Benzene diazonium chloride (C6H5N2Cl) is prepared by the reaction of aniline (C6H5NH2) with sodium nitrite (NaNO2) and hydrochloric acid (HCl) under controlled conditions.
C6H5NH2 + NaNO2 + HCl → C6H5N2Cl + NaCl + H2O

2. Reaction with ethanol: The diazonium salt is then reacted with ethanol (C2H5OH) to form an aryl ethyl ether and an inorganic salt.
C6H5N2Cl + C2H5OH → C6H5OC2H5 + HCl + N2

Explanation:
1. Formation of diazonium salt: The aniline reacts with sodium nitrite and hydrochloric acid to form benzene diazonium chloride. This reaction is known as diazotization and involves the replacement of the amino group (-NH2) by the diazonium group (-N2+X-).
2. Reaction with ethanol: The diazonium salt reacts with ethanol to form an aryl ethyl ether (also known as an aryl alkyl ether or an aryl ether) along with the liberation of hydrochloric acid gas and nitrogen gas. The aryl ethyl ether is an example of an arene, which is a general term for aromatic compounds.

In this reaction, the diazonium group (-N2+) substitutes one of the hydrogen atoms of the ethanol molecule, resulting in the formation of an aryl ethyl ether. The diazonium group is highly reactive and readily undergoes substitution reactions with various nucleophiles, including alcohols.

Hence, when ethanol is treated with benzene diazonium chloride, it forms arenes.

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