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What is the IUPAC name of the following compound? (a)N-Ethylpentan-1-amine

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What is the IUPAC name of the following compound?

(a) N-Ethylpentan-1-amine

(b) N-Ethylpentan-2-amine

(c) N,N-Diethylbutan-1-amine

(d) N-Ethyl-N-Butylethanamine

This question was posed to me in an internship interview.

The query is from Amines Nomenclature topic in portion Amines of Chemistry – Class 12

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Right choice is (c) N,N-Diethylbutan-1-amine

For explanation: This is a tertiary amine with two identical alkyl substituents (ethyl group) and one butyl group which acts as the major chain. The prefix N,N-Di is used for the ethyl groups and this collective group is attached at the first carbon of the butyl group.

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