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The IUPAC name of the tertiary amine (CH3CH2)2-N-CH3 (N-methyl diethylamine) is:

1. N-Methyl-N-ethyl ethanamine
2. Diethyl methanamine
3. N-Ethyl-N-methyl ethanamine
4. Methyl diethyl ethanamine

Correct answer: N-Ethyl-N-methyl ethanamine

Solution

The compound has two ethyl groups and one methyl group on nitrogen. The longest chain on N defines the parent amine (ethanamine). The substituents N-ethyl and N-methyl are listed alphabetically, giving N-ethyl-N-methyl ethanamine.

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