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How will you distinguish between : (b) CH_(3)-underset(underset(CH_(3))(|))(N)-H" and "(CH_(3))_(3)N |
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Answer» Solution :(a) Orange dye test can be used to distinguish between aniline and methyl amine. Dissolve aniline in dil. HCl in a test tube. Prepare a solution of `NaNO_(2)` in WATER in another test tube. Cool both the test TUBES in ice cold water. Add `NaNO_(2)` solution tothe solution of aniline. Then add 1 mL of solution of `beta-`napthol in sodium hydroxide. An orange dye is obtained. Methylamine does not give this test. (B) Dimethyl amine (secondary amine) and trimethyl amine (tertiary amine) cane be differentiated by Hinsberg test. Dimethyl amine reacts with benzene sulphonamide to give N, N-dimethyl benzene sulphonamide which is insoluble in aq. NaOH, so a ppt. is FORMED.  Trimethyl amine does not react with benzene SULPHONYL chloride. |
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