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If the boiling point of diethylamine is 329 K, predict the boiling point of ethyldimethylamine.

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in Chemistry – Class 12 by (188k points)
If the boiling point of diethylamine is 329 K, predict the boiling point of ethyldimethylamine.

(a) 310 K

(b) 329 K

(c) 340 K

(d) 351 K

This question was addressed to me in examination.

The above asked question is from Amines Physical Properties in section Amines of Chemistry – Class 12

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The correct answer is (a) 310 K

Explanation: Diethylamine is a 2° amine whereas, ethyldimethylamine is a 3° amine. In 3° amines, there are no hydrogen atoms available for intermolecular hydrogen bonding. Therefore, the tertiary amines have lowest boiling point among the primary and secondary counterparts.

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