Question

convert benzene into flurobenzene​

Answer 1

In this reaction aniline is to be treated with nitrous acid to form benzene diazonium chloride,which is further reacted with HBF₄ to form benzene diazonium fluorobarate.This is when heated,undergoes decomposition to give fluorobenzene.

Answer 2

Benzene can be converted into fluorobenzene in two steps as shown below:

• At room temperature, the chemical benzene is a colorless or light-yellow liquid.
• It smells pleasant and is quite combustible.
• It is also called benzol with six carbon and hydrogen atoms.
• Benzene cannot be converted to fluorobenzene directly.
• In order to convert, firstly we need to make aniline from benzene.
• This aniline is then converted to fluorobenzene.
• This can be explained in two steps:

Step: 1

Conversion of benzene into aniline.

• In the presence of $H_{2}SO_{4}$, fuming nitric acid is applied to the benzene ring to produce nitrobenzene.
• In this instance, $NO^{2+}$, which replaces a proton from the benzene ring, is the active agent.
• The required aniline product is produced via catalytic hydrogenation of the nitrobenzene.
• 10% Pd on carbon with ethanol as the solvent is the reagent employed in this process, which reduces the nitro group into amino groups by acting as a hydrogen gas absorbent.

Step: 2

Conversion of aniline into fluorobenzene.

• In the presence of HCl, aniline is allowed to react with $NaNO_{2}$ to create "Benzene diazonium chloride," which is then reacted with fluoroboric acid ($HBF_{4}$) to create fluorobenzene and release hazardous $BF_{3}$.

• This is called diazotization reaction.

Hence, we can prepare fluorobenzene from benzene.

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