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How will you distinguish between (CH_(3))_(2)NH and (CH_(3))_(3)N? |
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Answer» Solution :These can be distinguished by Liebermann nitrosoamine reaction. `(CH_(3))_(2)NH` (DIMETHYLAMINE) on streatment with `HNO_(2)` (generated in situ by the action of dil. CHl on `NaNO_(2)`) gives yellow coloured oily N-nitrosodimethylamine. `underset("Dimethylamine")((CH_(3))_(2)+NH)+HO-N=O to underset("N-Nitrosodimethylamine")((CH_(3))_(2)N-N=O)+H_(2)O` N-Nitrosodimethylamine on warming with a crystal of phenol and conc. `H_(2)SO_(4)` gives a green solution which when made alkaline with aqueous NaOH TURNS deep blue and then red on dilution `(CH_(3))_(3)N` (trimethylame), on the other HAND, being a `3^(@)` amine does not give this test. |
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