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A primary amine, RNH(2) can be reacted w...

A primary amine, `RNH_(2)` can be reacted with `CH_(3)-X` to get secondary amine, `R-NHCH(3)`, but the only disadvantage is that `3^(@)` amine and quaternary ammonium salts are also obtained as side products. Can your suggest a method where `RNH_(2)` forms only `2^(@)` amine?

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To convert a primary amine (RNH₂) to a secondary amine (RNHCH₃) without forming tertiary amines or quaternary ammonium salts, we can utilize the carbylamine reaction followed by reduction. Here’s a step-by-step solution: ### Step 1: Carbylamine Reaction 1. **Reagents**: Use chloroform (CHCl₃) and potassium hydroxide (KOH). 2. **Reaction**: The primary amine (RNH₂) reacts with chloroform in the presence of KOH to form an isocyanide (R-N≡C). \[ RNH_2 + CHCl_3 + 3KOH \rightarrow R-N \equiv C + 3KCl + 3H_2O \] ...
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