18.1.1 Structure and Nomenclature

• Primary, secondary, and tertiary amines differ based on the number of hydrogen atoms replaced by alkyl
• Naming simple aliphatic amines requires identifying the longest carbon chain and the position of the nitrogen atom
• Match the amine classification with its general formula:

  Primary ↔️ RNH2

  Secondary ↔️ R2NH

  Tertiary ↔️ R3N
• Steps to draw the structural formula of an amine based on its IUPAC name:

  1️⃣ Identify the parent chain length

  2️⃣ Determine the position of the nitrogen atom

  3️⃣ Add alkyl or aryl groups as substituents
• What is the key structural feature of amines?

  Nitrogen atom
• The general formula for amines is derived from ammonia by replacing hydrogen atoms with alkyl or aryl
• A primary amine has the general formula RNH2
• What is the general formula for a secondary amine?

  $R_{2}NH$
• A tertiary amine has the general formula R3N
• Tertiary amines have no hydrogen atoms bonded to the nitrogen atom
• Match the type of amine with its general formula:

  Primary ↔️ RNH2

  Secondary ↔️ R2NH

  Tertiary ↔️ R3N
• What is the general formula for a primary amine?

  $RNH_{2}$
• Primary amines have the general formula RNH2 where R is an alkyl or aryl
• Secondary amines have two alkyl or aryl groups bonded to the nitrogen atom
• What is the general formula for a tertiary amine?

  $R_{3}N$
• Amines are derived from ammonia (NH3) by replacing one or more hydrogen atoms with alkyl or aryl
• Primary amines have the general formula RNH2.
• Match the type of amine with its general formula:

  Primary amine ↔️ RNH2

  Secondary amine ↔️ R2NH

  Tertiary amine ↔️ R3N
• What is the key functional group in amines?

  Nitrogen atom
• Order the types of amines based on the number of groups bonded to nitrogen:

  1️⃣ Primary amines

  2️⃣ Secondary amines

  3️⃣ Tertiary amines
• In primary amines, the longest continuous chain containing the nitrogen atom is numbered to give the nitrogen the lowest possible number.
• The compound CH3NHCH2CH3 is named N-methyl ethylamine
• What is the IUPAC name for CH3CH2CH2NH2?

  Propan-1-amine
• What parent alkane name is used to replace "-e" when naming primary amines?

  Alkane
• $CH3CH2CH2NH2$ is named Propan-1-amine
• In secondary and tertiary amines, the "N-" prefix indicates substituents attached to the nitrogen atom.
• Match the amine type with its nomenclature rule:

  Primary ↔️ Replace "-e" with "-amine"

  Secondary/Tertiary ↔️ N-substituted primary amine
• What is the IUPAC name for $CH3CH2CH2NH2$?


  Propylamine
• Amines are organic compounds containing a nitrogen atom bonded to alkyl or aryl groups.
• The general formula for secondary amines is $RNH2$.


  False
• Order the amine types based on the number of alkyl/aryl groups bonded to the nitrogen atom:

  1️⃣ Primary

  2️⃣ Secondary

  3️⃣ Tertiary
• How many alkyl groups are bonded to the nitrogen in a secondary amine?

  Two
• Match the amine type with its example:

  Primary ↔️ $CH3CH2CH2NH2$

  Secondary ↔️ $CH3NHCH2CH3$
• What prefix is used to indicate the presence of nitrogen in cyclic amines?

  Aza-
• Common names for amines often indicate the alkyl groups bonded to the nitrogen atom followed by -amine.
• In primary amines, the "-e" of the parent alkane is replaced with "-amine."
• What organic group replaces hydrogen atoms in ammonia to form amines?

  Alkyl or aryl
• The IUPAC name for $CH3CH2CH2NH2$ is Propan-1-amine
• Secondary amines are named as N-substituted primary amines.
• The IUPAC name for $(CH3)3N$ is N,N-dimethyl methylamine