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SolutionsNomenclature

1. Name these amines

  1. CH3CH2CH2CH2NH2
  2. (CH3)2CHNH2
  3. CH3CH2NHCH3
  4. (CH3CH2)3N
  5. H2NCH2CH2CH2CH2NH2
  6. CH3CH(NH2)CH2CH2OH
  1. Butylamine (1-butanamine).
  2. Isopropylamine (2-propanamine).
  3. N-Methylethylamine (N-methylethanamine).
  4. Triethylamine.
  5. 1,4-Butanediamine (putrescine).
  6. 3-Amino-1-butanol: the alcohol has priority over the amine and the NH2 is named as an amino substituent.

2. Write the formula

  1. N,N-Dimethylcyclohexylamine
  2. 2-Methylpyrrolidine
  3. 3-Aminopropanoic acid
  4. Tetraethylammonium chloride
  1. C6H11N(CH3)2: a cyclohexane bearing a dimethylamino group.
  2. A five-membered ring with an NH and a methyl group on the carbon next to the nitrogen.
  3. H2NCH2CH2COOH (β-alanine).
  4. (CH3CH2)4N+ Cl−.

3. What does the N mean?

Why does the name N-ethyl-N-methylpropylamine contain the letters N? How many carbons does the compound have?

The N shows that the ethyl and methyl groups are bonded to the nitrogen and not to the propyl chain. It is a tertiary amine, CH3CH2CH2N(CH3)CH2CH3, with six carbons (C6H15N).

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