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Which amine is most basic in gas phase? (3° 2° Or 1°)

Tertiary amines are more basic than secondary amines, which are more basic than primary because in the gas phase, their is less stearic effect as well as no solvation effect so amines exhibit their  basicities  due to the electron-releasing effects of the organic substituents only , Thus  3° amines,  has three ERG groups so it becomes more basic and ammonia is least basic than amines because their is no ERG .

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