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What is the correct order of boiling points of the isomeric amines where A=ethylmethylamine, B=propylamine and C=trimethylamine?

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What is the correct order of boiling points of the isomeric amines where A=ethylmethylamine, B=propylamine and C=trimethylamine?

(a) A > B > C

(b) C > B > A

(c) B > C > A

(d) B > A > C

I have been asked this question in semester exam.

The doubt is from Amines Physical Properties in division Amines of Chemistry – Class 12

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The correct option is (d) B > A > C

Explanation: A, B and C are respectively the 2°, 1° and 3° isomers of the compound C3H9N. Primary and secondary amines have two and one hydrogen atoms respectively for hydrogen bonding. Whereas, tertiary amines do not have intermolecular association due to absence of H for hydrogen bonding.

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