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Karnataka Board PUCPUC Science 2nd PUC Class 12
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Nomenclature of Amines

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Estimated time: 5 minutes
CBSE: Class 12

Key Points: Nomenclature of Animes

Replace 'e' of alkane by amine'.

For example, \[ \underset{\text{Ethanamine}}{\mathrm{CH}_3\mathrm{CH}_2\mathrm{NH}_2} \quad , \quad \underset{\text{Propan-1-amine}}{\mathrm{CH}_3\mathrm{CH}_2\mathrm{CH}_2\mathrm{NH}_2} \]

Secondary amines are named as N-alkylaminoalkanes, and tertiary amines are named as N, N-dialkylaminoalkanes

For example,

\[ \underset{\text{N-methylethanamine}}{\mathrm{CH}_3 - \underset{\underset{\displaystyle \mathrm{H}}{|}}{\mathrm{N}} - \mathrm{CH}_2 - \mathrm{CH}_3} \quad , \quad \underset{\text{N-methylmethanamine}}{\mathrm{CH}_3 - \underset{\underset{\displaystyle \mathrm{H}}{|}}{\mathrm{N}} - \mathrm{CH}_3} \]

Aromatic amine,

It is named as aniline or benzenamine.

Maharashtra State Board: Class 12

Key Points: Nomenclature of Amines

  • Common system: Aliphatic amine is named by adding 'amine' to the alkyl group (e.g., CH₃NH₂ – methylamine).
  • Same groups in 2°/3° amines: Use prefix di or tri before the alkyl group name (e.g., trimethylamine).
  • IUPAC – Primary amines: Named as alkanamines, replacing 'e' of alkane with 'amine' (e.g., methanamine).
  • IUPAC – 2° & 3° amines: Named as N-alkylalkanamine or N,N-dialkylalkanamine (e.g., N,N-dimethylmethanamine).
  • Multiple —NH₂ groups: Positions are numbered, terminal 'e' retained (e.g., ethane-1,2-diamine); aromatic amines named as aniline derivatives (e.g., N, N-dimethylaniline).

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Related QuestionsVIEW ALL [49]

Write the IUPAC name of the following compound and classify it as primary, secondary and tertiary amine.

m−BrC6H4NH2

Predict the product 'A' in the following reaction.

\[\ce{\underset{(Acetyl chloride)}{CH3COCl}->[H2][Pd-BaSO4]A + HCl}\]

Complete the following reaction:

\[\ce{C6H5N2Cl ->[(i) HBF4][(ii) NaNO2/Cu, \Delta]}\]

Write the IUPAC name of the following compound and classify it as primary, secondary and tertiary amine.

(CH3)2CHNH2

An aromatic compound ‘A’ on treatment with aqueous ammonia and heating forms compound ‘B’ which on heating with Br2 and KOH forms a compound ‘C’ of molecular formula C6H7N. Write the structures and IUPAC names of compounds A, B and C.

Accomplish the following conversion:

Benzoic acid to aniline

How will you convert ethanoic acid into methanamine?

Write the IUPAC name of the following compound and classify it as primary, secondary and tertiary amine.

C6H5NHCH3

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