Which one of the following is the weakest base in gaseous phase?
A
Triethylamine
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B
Ethylamine
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C
Diethylamine
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D
Ammonia
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Solution
The correct option is D Ammonia As the number of alkyl group increases, due to +I effect the basicity of amine increases. Thus the correct order is a > c > b > d. Hence ammonia (NH3) is the weakest base among the given amines.