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Amines

Short Answer Type

291. Write the structure of the products of the following reactions:

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292.

Why does bromination of aniline, even under very mild conditions give 2, 4, 6- tribromo aniline instantaneously?

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293.

An organic compound (A) with IMF C₄H₁₁N, capable of being resolved into optical isomers gives a base soluble product with benzene sulphonyl chloride. What is the structure and IUPAC name of (A)? What happens when this compound (A) is treated with ethanoyl chloride?

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294.

How is benzene diazonium chloride obtained?

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295. Why are aryl diazonium ions more stable than alkyl diazonium ions?

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296.
Explain what is meant by the 'protection of the amino group'.?

Direct nitration of aniline (and other aryl amines) results in oxidized, tarry material. This is prevented by acetylation of the amino group before nitration. The hydrolysis of the o- and p- nitro acetanilide yields the corresponding nitro anilines. Acetylation of arylamines prior to substitution reactions is referred to as the “protection of the amino group.”

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297. How would you protect the amino group during the nitration of an aromatic amino compound? Give chemical equations.

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298.

Show by means of equations how an amide may be converted into an amine containing the same number of carbon atoms.

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299.

Show by means of equations how an amide may be converted into an amine containing one carbon atom less than the amide.

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Long Answer Type

300. Draw all possible isomers of a benzene containing compound with molecular formula C₇H₉N. Write their IUPAC names. Explain their reaction towards nitrous acid.

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