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प्रश्न
Describe Hinsberg method for the identification of primary, secondary and tertiary amines. Also write the chemical equations of the reactions involved.
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उत्तर
Hinsberg's method: Benzenesulphonyl chloride (C6H5SO2Cl) (known as Hinsberg’s reagent) reacts with primary and secondary amines to form sulphonamides. The method is used for the distinction of primary, secondary and tertiary amines.
Sulphonamide formed in case of a primary (1°) amine is soluble in an alkali.
Sulphonamide formed in case of a secondary (2°) amine remains insoluble in an alkali.
A tertiary (3°) amine does not give a positive Hinsberg test.
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संबंधित प्रश्न
What is the action of nitrous acid on primary nitroalkane?
Distinguish between the following pairs of compounds: Aniline and N-methylaniline
When primary amine reacts with CHCl3 in alcoholic KOH, the product is _______.
(A) aldehyde
(B) alcohol
(C) cyanide
(D) an isocyanide
What is the action of Benzene Sulphonyl Chloride on primary, secondary and tertiary
amines?
On heating an aliphatic primary amine with chloroform and ethanolic potassium hydroxide, the organic compound formed is ______.
Isocyanide reaction involves the intermediate formation of ______.
Match List I with List II.
| List I | List II | ||
| (A) | Benzenesulphonyl chloride | (I) | Test for primary amines |
| (B) | Hoffmann bromamide reaction | (II) | Anti Saytzeff |
| (C) | Carbylamine reaction | (III) | Hinsberg reagent |
| (D) | Hoffmann orientation | (IV) | Known reaction of Isocyanates |
Choose the correct answer from the options given below:
Give reasons:
(CH3)2NH is more basic than (CH3)3N in an aqueous solution.
In the reaction \[\ce{C6H5NH2 + CHCl3 + 3KOH -> A + 3B + 3C}\] the product A is:
Carbylamine test is the distinguishing test for ______.
