Explanation
The boiling points of compounds depend on the extent of H-bonding present in that compound . The more extensive the H-bonding in the compound , the higher is the boiling point.
Therefore, the order of the boiling points of amines is
1o > 2o > 3o
The order of the boiling point of given compounds is
N,N-dimethylamine < diethylamine < n-butylamine III II I
The gabriel synthesis is a chemical reaction that transforms primary alkyl halides into primary amines. Traditionally the reaction uses potassium phthalimide.
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