Which of the following statements is INCORRECT in case of Hofmann bromamide degradation ?
- Reaction is useful for decreasing length of carbon chain by one carbon atom
- It gives tertiary amine
- It gives primary amine
- Aqueous or alcoholic $KOH$ is used with bromine
The Correct Option is B
Solution and Explanation
The correct option is(B): It gives tertiary amine.
The statement (B), 'It gives tertiary amine' is an incorrect statement.
The correct statement is, 'It gives primary amine'.
\(R - CONH _{2}+ Br _{2}+4 NaOH \rightarrow R - NH _{2}+ Na _{2} CO _{3}+2 NaBr +2 H _{2} O\)
Top Questions on Amines
- Number of compounds which give reaction with Hinsberg's reagent is_______.
- An amine $(\text{X})$ is prepared by ammonolysis of benzyl chloride. On adding $p$-toluenesulphonyl chloride to it, the solution remains clear.Molar mass of the amine $(\text{X})$ formed is _____ $\text{g mol}^{-1}$.(Given molar mass in $\text{g mol}^{-1}$: $\text{C} = 12, \, \text{H} = 1, \, \text{O} = 16, \, \text{N} = 14$)
- X of enthanamine was subjected to reaction with \(NaNO_2/HCl\) followed by hydrolysis to liberate \(N_2\) and HCl. The HCl generated was completely neutralised by 0.2 moles of NaOH. X is ____ g.
- Number of amine compounds from the following giving solids which are soluble in NaOH upon reaction with Hinsberg's reagent is _____.
- Given below are two statements:
Statement (I) : All the following compounds react with p-toluenesulfonyl chloride.
$C_6H_5NH_2 \quad (C_6H_5)_2NH \quad (C_6H_5)_3N$
Statement (II) : Their products in the above reaction are soluble in aqueous NaOH.
In the light of the above statements, choose the correct answer from the options given below.
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Concepts Used:
Amines
Amine is a type of compound which is derived from ammonia (NH3). According to Organic chemistry, they are basically classified as the functional groups of the organic nitrogen compounds that contain nitrogen atoms with a lone pair.
Amine - Types
Primary Amines:
It is formed when one hydrogen atom in ammonia is substituted by an alkyl or aromatic group. Amino acids and methyl amine are the best examples that why aromatic amines include aniline.
Secondary Amines:
Amines that have two organic substitutes either alkyl or aryl ones or both and are bound to the nitrogen together with one hydrogen are termed as secondary amines. For Example, Dimethylamine.
Tertiary Amines:
Tertiary Amines are the amines where the nitrogen consists of three organic substitutes. For example, Trimethylamine and EDTA.